Prof. Andrei A. Fotiadi Profile

Prof. Andrei A. Fotiadi

Senior Researcher at University of Oulu, OPEM Unit

SPIE Involvement:

Author

Publications (77)

Proceedings Article | 6 June 2024 Poster

Brillouin interaction between individual optical modes excited in multimode fibers

Andrei Fotiadi, Edik Rafailov, Dmitry Korobko, Aleksey Tregubov, Patrice Mégret, Alexander Bykov, Igor Meglinski

Proceedings Volume 13004, (2024) https://doi.org/10.1117/12.3022339

KEYWORDS: Multimode fibers, Optical fibers, Scattering, Signal processing, Sensing systems, Miniaturization, Laser scattering, Biomedical optics, Waveguides, Wave propagation

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Proceedings Article | 6 June 2024 Poster

Supermode noise suppression of the harmonically mode-locked fiber laser through continuous wave injection: experiment and numerical simulations

D. Korobko, V. Ribenek, P. Itrin, I. Panyaev, P. Mironov, A. Fotiadi

Proceedings Volume 13004, (2024) https://doi.org/10.1117/12.3022122

KEYWORDS: Continuous wave operation, Mode locking, Numerical simulations, Fiber lasers, Solitons, Laser resonators, Laser development, Harmonic generation

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Proceedings Article | 6 June 2024 Poster

The total suppression of light reflection from a one-dimensional photonic crystal by a two-dimensional array of nanoparticles

Sergey Moiseev, Igor Glukhov, Andrei Fotiadi

Proceedings Volume 12991, (2024) https://doi.org/10.1117/12.3021860

KEYWORDS: Nanoparticles, Reflection, Photonic crystals, Metals, Localized surface plasmon resonances, Scattered light, Optical microcavities, Electromagnetic radiation, Dielectrics, Visible radiation

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Proceedings Article | 6 June 2024 Poster

The concept of the terahertz generator based on an array of double-walled carbon nanotubes with a direct current pump

Sergey Afanas’ev, Aleksei Kadochkin, Dmitry Sannikov, Andrei Fotiadi

Proceedings Volume 12994, (2024) https://doi.org/10.1117/12.3017240

KEYWORDS: Terahertz radiation, Carbon nanotubes, Optical coherence, Laser radiation, Physical coherence, Design, Standing waves, Pulse generators, Plasmonics, Phase velocity

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Proceedings Article | 6 June 2024 Poster

Control of the number of solitons in the fiber laser cavity due to continuous wave injection

D. Korobko, V. Ribenek, P. Itrin, I. Panyaev, M. Pribylov, A. Fotiadi

Proceedings Volume 13004, (2024) https://doi.org/10.1117/12.3022139

KEYWORDS: Solitons, Continuous wave operation, Fiber lasers, Ring lasers, Mode locking, Laser resonators

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Proceedings Article | 6 June 2024 Poster

Polarization maintaining fiber laser harmonically mode-locked due to SESAM with supermode noise suppression through continuous wave injection

D. Korobko, V. Ribenek, P. Itrin, I Panyaev, M. Pribylov, A. Fotiadi

Proceedings Volume 13003, (2024) https://doi.org/10.1117/12.3022147

KEYWORDS: Continuous wave operation, Mode locking, Fiber lasers, Polarization maintaining fibers, Solid state lighting, Pulsed laser operation, Polarization, Numerical simulations, Laser resonators

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Proceedings Article | 6 June 2024 Poster

1265 nm laser irradiation activates antioxidant system in B16-F10 and CHO-K1 cells

Anna Khokhlova, Dinara Dolgova, Aigul Gilmutdinova, Igor Zolotovskii, Valeria Ribenek, Yury Saenko, Dmitrii Stoliarov, Sergei Sokolovski, Edik Rafailov, Dmitriy Korobko, Igor Meglinski, Alexander Bykov, Andrei Fotiadi

Proceedings Volume 13010, (2024) https://doi.org/10.1117/12.3022484

KEYWORDS: Melanoma, Laser radiation, Laser irradiation, Defense systems, Cancer, Photodynamic therapy, Oxygen, Genetics, Defense and security, Continuous wave operation

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Proceedings Article | 6 June 2024 Poster

Generation of optical pulses due to phase modulation of surface electromagnetic wave in a cylindrical semiconductor waveguide with a space charge wave

Aleksei Abramov, Aleksei Kadochkin, Sergey Moiseev, D. Sannikov, A. Fotiadi

Proceedings Volume 12991, (2024) https://doi.org/10.1117/12.3017662

KEYWORDS: Semiconductors, Waveguides, Electromagnetic radiation, Phase modulation, Modulation, Ultrafast phenomena, Optical surfaces, Repetition frequency, Radio propagation, Pulse signals

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Proceedings Article | 6 June 2024 Poster

DFB laser injection-locked to PM fiber ring cavity with 75-Hz Lorentzian linewidth

Ivan Panyaev, Pavel Itrin, Dmitry Korobko, Igor Yavtushenko, Patrice Mégret, Andrei Fotiadi

Proceedings Volume 13002, (2024) https://doi.org/10.1117/12.3022414

KEYWORDS: Fiber lasers, Laser stabilization, Semiconductor lasers, Optoelectronics, Interference (communication), Continuous wave operation, Standards development, Signal intensity, Resistance, Red lasers

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Proceedings Article | 5 June 2023 Poster + Paper

Brillouin-like effects in rare-earth-doped bi-directional optical fiber amplifiers

Andrei Fotiadi, Dmitry Korobko, Ivan Chapalo, Patrice Megret, Igor Zolotovskii

Proceedings Volume 12569, 125690I (2023) https://doi.org/10.1117/12.2665902

KEYWORDS: Optical gratings, Optical fibers, Acoustic waves, Wave propagation, Refractive index, Hole burning spectroscopy, Fiber amplifiers, Polarizability, Picosecond phenomena, Fiber lasers

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Proceedings Article | 5 June 2023 Poster + Paper

Modulation instability of surface plasmon polaritons in graphene double-layer structure

Sergey Moiseev, Dmitry Korobko, Igor Zolotovskii, P. Mégret, I. Chapalo, A. Fotiadi

Proceedings Volume 12569, 125690G (2023) https://doi.org/10.1117/12.2665855

KEYWORDS: Graphene, Modulation, Surface plasmon polaritons, Gallium arsenide, Wave propagation, Pulse generators, Numerical simulations

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Proceedings Article | 5 June 2023 Poster + Paper

Fine tuning of the repetition rate and stabilization of harmonically mode-locked fiber laser with CW component in the spectrum

Dmitry Korobko, Valeria Ribenek, Pavel Itrin, Dmitrii Sementsov, Patrice Mégret, Ivan Chapalo, Andrei Fotiadi

Proceedings Volume 12569, 125690H (2023) https://doi.org/10.1117/12.2665857

KEYWORDS: Continuous wave operation, Solitons, Fiber lasers, Mode locking, Laser resonators, Pulsed laser operation, Laser optics, Education and training, Polarization, Laser radiation

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Proceedings Article | 31 May 2023 Poster + Paper

Brillouin interaction between single optical modes excited in multimode fibers

Andrei Fotiadi, Edik Rafailov, Dmitry Korobko, Ivan Chapalo, Patrice Mégret, Alexander Bykov, Igor Meglinski

Proceedings Volume 12572, 125721L (2023) https://doi.org/10.1117/12.2665904

KEYWORDS: Optical fibers, Multimode fibers, Acoustic waves, Wave propagation, Planar waveguides, Laser scattering, Diffraction, Singular optics, Single mode fibers, Fiber lasers

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Proceedings Article | 31 May 2023 Poster + Paper

Stabilizing DFB laser injection-locked to an external polarization maintaining optical fiber ring cavity

Ivan Panyaev, Pavel Itrin, Dmitry Korobko, Dmitrij Sementsov, Ivan Chapalo, Patrice Mégret, Andrei Fotiadi

Proceedings Volume 12572, 125721K (2023) https://doi.org/10.1117/12.2665903

KEYWORDS: Laser stabilization, Fiber lasers, Laser frequency, Laser resonators, Feedback loops, Photodetectors, Semiconductor lasers, Optoelectronics, Cavity resonators, Laser optics

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Proceedings Article | 30 May 2023 Poster + Paper

Soliton Raman shift wavelength tuning through the pump pulse polarization control

Dmitry Korobko, Ivan Panyaev, Pavel Itrin, Dmitrii Sementsov, Patrice Mégret, Ivan Chapalo, Andrei Fotiadi

Proceedings Volume 12573, 125730Z (2023) https://doi.org/10.1117/12.2665863

KEYWORDS: Polarization, Raman spectroscopy, Solitons, Tunable filters, Optical filters, Fiber lasers, Picosecond phenomena, Autocorrelation, Wavelength tuning, Polarization control

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Proceedings Article | 26 May 2022 Poster + Paper

Modeling of Brillouin-like amplification in rare-earth-doped optical fibers

A. Fotiadi, D. Korobko, I. Zolotovskii

Proceedings Volume 12143, 121430I (2022) https://doi.org/10.1117/12.2621138

KEYWORDS: Optical fibers, Fiber amplifiers, Wave propagation, Optical amplifiers, Hole burning spectroscopy, Refractive index, Polarizability, Scattering, Modulation

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Proceedings Article | 25 May 2022 Poster + Paper

Harmonically mode-locked fiber laser with fine repetition rate tuning through continuous wave injection

Dmitry Korobko, Valeria Ribenek, Dmitrii Stoliarov, Andrei Fotiadi

Proceedings Volume 12142, 1214215 (2022) https://doi.org/10.1117/12.2621029

KEYWORDS: Solitons, Fiber lasers, Laser resonators, Polarization, Mode locking, Optical filters, Pulsed laser operation, Laser optics, Switching

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Proceedings Article | 25 May 2022 Presentation + Paper

Generation of modulation instability-induced high-repetition-rate pulse train with high-phase modulation depth

Aleksei Abramov, Igor Zolotovskii, Vladimir Kamynin, Andrei Domanov, Aleksandr Alekseev, Dmitriy Korobko, Marina Yavtushenko, Andrei Fotiadi

Proceedings Volume 12142, 1214211 (2022) https://doi.org/10.1117/12.2622312

KEYWORDS: Waveguides, Modulation, Dispersion, Light wave propagation, Frequency modulation, Optical fibers, Geometrical optics, Wave propagation, Refractive index, Ultrafast phenomena

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Proceedings Article | 25 May 2022 Presentation + Paper

Giant pulse generation in the fibers with inscribed Bragg gratings

Aleksei Abramov, Igor Zolotovskii, Vladimir Kamynin, Victor Prikhodko, Aleksei Tregubov, Dmitriy Stolyarov, Marina Yavtushenko, Andrei Fotiadi

Proceedings Volume 12142, 1214212 (2022) https://doi.org/10.1117/12.2622291

KEYWORDS: Optical fibers, Fiber Bragg gratings, Dispersion, Frequency modulation, Fermium, Refractive index, Modulation, Bragg gratings, Ultrafast phenomena, Reflectivity

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Proceedings Article | 25 May 2022 Poster + Paper

Supermode noise suppression in harmonically mode-locked fiber laser by continuous wave injection

Dmitry Korobko, Pavel Itrin, Valeria Ribenek, Dmitrii Stoliarov, Andrei Fotiadi

Proceedings Volume 12142, 1214214 (2022) https://doi.org/10.1117/12.2621025

KEYWORDS: Solitons, Fiber lasers, Mode locking, Solid state lighting, Pulsed laser operation, Polarization, Optical filters, Laser applications, Semiconductor lasers

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Proceedings Article | 24 May 2022 Poster + Paper

Plasmon excitation in array of double-walled carbon nanotubes by free-electron beam

Aleksei Kadochkin, Igor Zolotovskii, Sergey Moiseev, Andrei Fotiadi

Proceedings Volume 12131, 121310X (2022) https://doi.org/10.1117/12.2621584

KEYWORDS: Nanoplasmonics, Surface plasmon polaritons, Electron beams, Carbon nanotubes, Terahertz radiation

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Proceedings Article | 20 May 2022 Poster + Paper

Stabilizing Brillouin lasing in high-Q optical fiber cavity pumped from self-injection locked DFB laser

J. L. Bueno-Escobedo, S. V. Miridonov, Ma. Carmen Maya-Sánchez, D. A. Korobko, I. O. Zolotovskii, A. Fotiadi

Proceedings Volume 12141, 121410J (2022) https://doi.org/10.1117/12.2621113

KEYWORDS: Fiber lasers, Laser stabilization, Feedback loops, Semiconductor lasers, Polarization, Laser resonators, Optical fibers, Fiber optics, Electronic circuits

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Proceedings Article | 17 May 2022 Poster + Paper

Brillouin optical time domain analysis with dual-frequency self-injection locked DFB laser

Cesar Lopez-Mercado, Pavel Itrin, Dmitry Korobko, Igor Zolotovskii, Andrei Fotiadi

Proceedings Volume 12139, 121391D (2022) https://doi.org/10.1117/12.2621130

KEYWORDS: Fiber lasers, Laser sources, Spatial resolution, Laser optics, Laser stabilization, Electrooptic modulators, Fiber optics sensors

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Proceedings Article | 18 April 2021 Poster + Presentation + Paper

Peculiar features of surface plasmon-polariton modulation instability in a metal film with varying thickness

Dmitry Korobko, Igor Zolotovskii, Sergey Moiseev, Andrei Fotiadi

Proceedings Volume 11770, 117701L (2021) https://doi.org/10.1117/12.2589109

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Proceedings Article | 18 April 2021 Poster + Presentation + Paper

Saturable absorber for ring fiber lasers on the base of coupler coated by CNTs

Dmitry Korobko, Dmitry Stoliarov, Pavel Itrin, Valeria Ribenek, Artem Sysa, Yury Shaman, Andrei Fotiadi

Proceedings Volume 11775, 117750X (2021) https://doi.org/10.1117/12.2589130

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Proceedings Article | 18 April 2021 Poster + Presentation + Paper

Stable harmonic mode locking in soliton fiber laser with frequency shift: theory and experiment

Dmitry Korobko, Dmitry Stoliarov, Pavel Itrin, Valeria Ribenek, Andrei Fotiadi, Regina Gumenyuk

Proceedings Volume 11770, 117701N (2021) https://doi.org/10.1117/12.2589124

KEYWORDS: Solitons, Mode locking, Fiber lasers, Pulsed laser operation, Telecommunications, Spectroscopy, Scientific classification systems, Reliability, Optical filters, Numerical simulations

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Soliton fiber lasers with passive harmonic mode-locking (HML) have been known for several decades as reliable sources of pulse trains with a high repetition rate. They are commonly employed as frequency comb generators in a wide list of applications in spectroscopy, telecommunications, microwave photonics. Besides that exhibiting advantageous consumer properties, such as compactness, reliability, low cost and convenience of beam delivery approach these sources are among the most attractive alternatives for material processing, medicine lasers and other areas. In the first group of these lasers the HML occurs due to special intra-cavity periodic filter with a free spectral range (FSR) which is a multiple of the main cavity FSR and equals to the pulse repetition rate. The second group of HML lasers in this classification is attractive for the scientific community due to the automatic arrangement of strongly periodic pulse pattern in the laser cavity through pulse repulsion. However, it is difficult to specify the mechanism of pulse repulsion for each case. It can be based on interaction through saturating and relaxing dissipative parameters, continuous-wave (CW) radiation component, dispersion waves, or acoustic waves induced by electrostriction, etc. A common feature of all interaction induced effects is low intensity, in many cases only slightly exceeding the noise level. The noise-induced fluctuations in the time interval of the HML pulse train are known as HML timing jitter, and its value is significantly higher than the timing jitter in lasers operating at fundamental frequency. It is a major drawback of the HML laser technology. We report the stabilizing frequency shift effect in harmonic mode-locking ring soliton fiber laser that is studied theoretically and numerically. We demonstrate that the frequency shift contributes to an increase in the hardness of interpulse interactions and can led to stabilization of the periodic arrangement of pulses. The experiment carried out confirms the theoretical predictions and the results of numerical simulation.

Proceedings Article | 18 April 2021 Presentation + Paper

Stabilizing Brillouin fiber laser for applications in distributed BOTDA sensing

V. Spirin, C. A. Lopez-Mercado, P. Mégret, D. Korobko, I. Zolotovskii, A. Fotiadi

Proceedings Volume 11772, 1177207 (2021) https://doi.org/10.1117/12.2589112

KEYWORDS: Fiber lasers, Semiconductor lasers, Laser scattering, Spatial resolution, Semiconductors, Scattering, Optoelectronics, Light scattering, Laser systems engineering, Laser sources

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Proceedings Article | 18 April 2021 Poster + Presentation + Paper

Microwave signal generation with a dual-frequency self-injection-locked DFB laser

C. Lopez-Mercado, J. Bueno-Escopedo, M. C. Maya-Sanchez, S. Miridovov, D. Korobko, I. Zolotovskii, V. Spirin, A. Fotiadi

Proceedings Volume 11770, 117701M (2021) https://doi.org/10.1117/12.2589111

KEYWORDS: Fiber lasers, Signal generators, Microwave radiation, Tunable lasers, Semiconductor lasers, Spectroscopy, Sensors, Semiconductors, Precision measurement, Optoelectronics

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Proceedings Article | 18 April 2021 Poster + Presentation + Paper

Dual-frequency narrowband CW fiber laser implementing self-injection locking of DFB laser diode and Brillouin lasing in a single ring cavity

V. Spirin, J. Bueno-Escopedo, C. Lopez-Mercado, P. Mégret, D. Korobko, I. Zolotovskii, A. Fotiadi

Proceedings Volume 11770, 117701K (2021) https://doi.org/10.1117/12.2589106

KEYWORDS: Fiber lasers, Semiconductor lasers, Continuous wave operation, Laser scattering, Telecommunications, Standards development, Scattering media, Scattering, Optoelectronics, Light scattering

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Linewidth narrowing and stabilization of semiconductor laser light generation is of great research interest governed by the huge demand of compact cost-effective narrow-band laser sources for many potential applications. In 2012 we have demonstrated a simple kHz-linewidth laser just splicing a standard distributed feedback (DFB) laser diode and a few passive telecommunication components. The principle of operation employs the mechanism of self-injection locking that significantly improves DFB laser performance. While a typical linewidth of free-running DFB semiconductor lasers ranges from a few to tens MHz, self-injection locking of a DFB laser through an external fiber ring cavity causes a drastic reduction of its laser linewidth down to a few kHz. The advantage of the proposed configuration is that the same external fiber ring cavity could be used for self-injection locking of a DFB laser and as Brillouin scattering media to generate Stokes shifted optical wave. However, a continuous laser operation at two frequencies has not been reported yet preventing it from many prosperous photonic applications. Here, we introduce a simple dual-frequency laser configuration. In our approach, the implementation of self-injection locking into the Brillouin ring fiber laser helps to maintain coupling between the DFB laser and an external high-Q fiber cavity enabling dual-frequency laser operation. Specifically, the same ring fiber cavity is used to generate narrow-band light at the pump frequency (through self-injection locking mechanism) and narrow-band laser light at Stokes frequency (through stimulated Brillouin scattering). The system is supplied by a low-bandwidth active optoelectronic feedback circuit controlled by a low-cost USB-DAQ card that helps the laser to maintain the desired operation mode. The fiber configuration reduces the natural Lorentzian linewidth of light emitted by the laser at pump and Stokes frequencies down to 270 Hz and 220 Hz, respectively, and features a stable 300-Hz-width RF spectrum recorded with the beating of two laser outputs. We have explored key features of the laser performance, revealing its stability and applicability to RF harmonic generation of high spectral purity as an additional benefit of the proposed technique.

Proceedings Article | 1 April 2020 Presentation + Paper

Spatial-temporal averaging algorithm for improving vibration detection with low-cost phase-sensitive OTDR

C. López-Mercadoa, V. Spirin, J. L. Bueno Escobedo, P. Megret, D. Korobko, I. Zolotovskii, A. Fotiadi

Proceedings Volume 11354, 113542V (2020) https://doi.org/10.1117/12.2557767

KEYWORDS: Signal to noise ratio, Fiber lasers, Optical fibers, Laser stabilization, Detection and tracking algorithms, Sensors, Spatial resolution, Polarization, Interference (communication), Signal detection

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Proceedings Article | 1 April 2020 Presentation + Paper

Narrow linewidth random laser based on short Er-doped artifice Rayleigh fiber

Sergei Popov, Oleg Butov, Alexey Bazakutsa, Mikhail Yu. Vyatkin, Yuri Chamorovskiy, Krassimir Panajotov, Andrei Fotiadi

Proceedings Volume 11357, 113571Q (2020) https://doi.org/10.1117/12.2557818

KEYWORDS: Fiber lasers, Random lasers, Fiber Bragg gratings, Physics, Optical fibers, Laser stabilization, Reflectivity, Photonics, Laser scattering, Refractive index

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Proceedings Article | 1 April 2020 Presentation + Paper

Active stabilization of the DFB laser injection-locked to an external fiber-optic ring resonator

V. Spirin, J. Bueno Escobedo, K. Panajotov, P. Mégret, D. Korobko, I. Zolotovskii, A. Fotiadi

Proceedings Volume 11356, 113561A (2020) https://doi.org/10.1117/12.2557672

KEYWORDS: Resonators, Laser resonators, Laser stabilization, Semiconductor lasers, Fiber lasers, Fiber optics, Optoelectronics, Feedback loops, Laser optics, Laser applications

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Proceedings Article | 1 April 2020 Presentation + Paper

Modeling mode-locked Bismuth laser for soliton generation in the normal and anomalous dispersion regime

M. Zajnulina, D. Korobko, Igor Shchukarev, A. Fotiadi

Proceedings Volume 11357, 113570J (2020) https://doi.org/10.1117/12.2557687

KEYWORDS: Dispersion, Solitons, Fiber lasers, Bismuth, Picosecond phenomena, Mode locking, Diffraction gratings, Polarization, Optical solitons, Pulsed laser operation

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Proceedings Article | 1 April 2020 Presentation + Paper

Jitter suppression in passive harmonic mode-locking fiber ring laser

D. Korobko, I. Zolotovskii, R. Gumenyuk, M. Zajnulina, A. Fotiadi

Proceedings Volume 11358, 1135822 (2020) https://doi.org/10.1117/12.2556072

KEYWORDS: Fiber lasers, Mode locking, Solitons, Optical filters, Single mode fibers, Laser stabilization, Picosecond phenomena, Polarization, Numerical simulations, Pulsed laser operation

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Proceedings Article | 1 April 2020 Presentation + Paper

Control of a Brillouin microresonator laser through detuning effects

D. Korobko, I. Zolotovskii, A. Fotiadi

Proceedings Volume 11358, 1135824 (2020) https://doi.org/10.1117/12.2557214

KEYWORDS: Microresonators, Optical microcavities, Silicon, Waveguides, Numerical simulations, Laser scattering, Scattering, Silica, Laser development, Laser applications

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Proceedings Article | 30 April 2019 Paper

Generation of Raman solitons with minimal losses for dispersion radiation due to longitudinally nonuniform fiber

Dmitry Korobko, Andrei Fotiadi, Tigran Vartanyan, Igor Zolotovskii

Proceedings Volume 11026, 1102613 (2019) https://doi.org/10.1117/12.2520700

KEYWORDS: Solitons, Dispersion, Optical fibers, Picosecond phenomena, Wave propagation, Fiber lasers, Pulsed laser operation, Supercontinuum generation

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Proceedings Article | 26 April 2019 Paper

Selective polarization generation in an amplifying photonic crystal with 2D array of metal nanoparticles

Sergey Moiseev, Yuliya Dadoenkova, Igor Glukhov, Tigran Vartanyan, Andrei Fotiadi, Florian F. Bentivegna

Proceedings Volume 11031, 1103114 (2019) https://doi.org/10.1117/12.2520788

KEYWORDS: Nanoparticles, Polarization, Optical microcavities, Interfaces, Photonic crystals, Metals, Surface plasmons, Plasmons, Composites, Silver

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Proceedings Article | 21 March 2019 Paper

Non-resonant operation of microcavity Brillouin lasers

Dmitry Korobko, Igor Zolotovskii, S. Sokolovskii, Andrei Fotiadi

Proceedings Volume 10904, 109041U (2019) https://doi.org/10.1117/12.2508345

KEYWORDS: Optical microcavities, Numerical simulations, Laser scattering, Signal generators, Phase matching, Scattering, Transmittance, Fiber lasers, Photonics

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Proceedings Article | 7 March 2019 Presentation + Paper

Effects of high and low level 1265 nm laser irradiation on HCT116 cancer cells

Anna Khokhlova, Igor Zolotovskii , Evgenia Pogodina, Yury Saenko, Dmitrii Stoliarov, Svetlana Vorsina, Andrei Fotiadi, Daria Liamina, Sergei Sokolovski, Edik Rafailov

Proceedings Volume 10861, 108610L (2019) https://doi.org/10.1117/12.2509529

KEYWORDS: Laser irradiation, Cancer, Laser dentistry, Radiation effects, Cell death, High power lasers, Laser therapeutics, Oxygen, Statistical analysis, Microscopes, Low-intensity laser therapy, Semiconductor lasers, Fiber lasers, DNA photonics, Near infrared

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Proceedings Article | 4 March 2019 Paper

Cost-effective solution for phase-OTDR distributed acoustic/vibration sensing

V. Spirin, C. López-Mercado, J. Jason, J. Bueno-Escobedo, P. Mégret, M. Wuilpart, D. Korobko, I. Zolotovskii, S. Sokolovskii, A. Fotiadi

Proceedings Volume 10903, 109030Q (2019) https://doi.org/10.1117/12.2509767

KEYWORDS: Fiber lasers, Signal to noise ratio, Laser stabilization, Semiconductor lasers, Sensors, Polarization, Spatial resolution, Fiber optics

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Self-injection locking - an efficient method to improve the spectral performance of semiconductor lasers without active stabilization - has already demonstrated its high potential for operation with single-longitude-mode fiber lasers. Recently, we demonstrated that self-injection locking of a conventional DFB laser through an external fiber optic ring cavity causes a drastic decrease of the laser linewidth and makes possible its direct application in a phase-sensitive optical time domain reflectometry (φ-OTDR) acoustic sensor system. Detection and localization of dynamic perturbations in the optical fiber were successfully demonstrated at the distance of 9270 m. However, the ability of the system to restore the perturbating frequency spectrum was not quantified. Here, we have evaluated the performance of a φ-OTDR system for acoustic/vibration measurements utilizing a conventional telecom DFB laser self-stabilized through an external PM optical fiber ring resonator. The use of PM fiber components prevents the polarization mode-hopping that is proved to be a major source of the laser instability, resulting in single frequency laser operation with 6 kHz linewidth. The laser diode current and the laser fiber configuration temperature both have been stabilized with accuracies better than 0.3%. All laser components have been placed into a special insulating box to protect the laser from external perturbations. Under these conditions, the typical duration of laser operation in self-maintaining stabilization regime is ~30 minutes. The laser long-term frequency drift is estimated to be less than ~30 MHz/min. This low-cost solution is directly compared with the use of a commercial, ultra-narrow linewidth (~ 100 Hz) fiber laser implemented into the same setup. Both systems are tested for measurement of the frequency of vibration applied to a fiber at a distance of 3500 m. The obtained SNR value higher than 6 dB demonstrates the ability of the DFB laser to be used in distributed measurements of vibrations with frequencies up to 5600 Hz with a spatial resolution of 10 meters.

Proceedings Article | 14 May 2018 Paper

Generation of dark soliton trains with high repetiton rates through dissipative four wave mixing

Dmitry Korobko, Igor Zolotovskii, Krassimir Panajotov, Andrei Fotiadi

Proceedings Volume 10684, 106842H (2018) https://doi.org/10.1117/12.2311335

KEYWORDS: Mode locking, Solitons, Fiber lasers, Dispersion, Four wave mixing, Pulsed laser operation, Numerical simulations, Picosecond phenomena

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Proceedings Article | 9 May 2018 Paper

Modeling of a semiconductor laser coupled to an external fiberoptic ring resonator

Dmitry Korobko, Igor Zolotovsky, Krassimir Panajotov, Vasily Spirin, Andrei Fotiadi

Proceedings Volume 10682, 106821V (2018) https://doi.org/10.1117/12.2307217

KEYWORDS: Semiconductor lasers, Resonators, Laser resonators, Fiber lasers, Laser stabilization, Laser damage threshold, Fiber optics, Optical filters, Feedback loops, Semiconductors

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Proceedings Article | 9 May 2018 Presentation + Paper

Sensitivity of high Rayleigh scattering fiber in acoustic/vibration sensing using phase-OTDR

Johan Jason, Sergei Popov, Oleg Butov, Yuri Chamorovskiy, Konstantin Golant, Andrei Fotiadi, Marc Wuilpart

Proceedings Volume 10680, 106801B (2018) https://doi.org/10.1117/12.2307569

KEYWORDS: Single mode fibers, Acoustics, Signal detection, Rayleigh scattering, Backscatter, Scattering

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Proceedings Article | 9 May 2018 Paper

Cost-effective laser source for phase-OTDR vibration sensing

C. López-Mercado, J. Jason, V. Spirin, J. Bueno Escobedo, M. Wuilpart, P. Mégret, D. Korobko, I. Zolotovskiy, A. Fotiadi

Proceedings Volume 10680, 106802S (2018) https://doi.org/10.1117/12.2307683

KEYWORDS: Fiber lasers, Signal to noise ratio, Semiconductor lasers, Laser sources, Superposition, Laser resonators, Acoustics, Laser systems engineering, Fiber optics, Resonators

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Self-injection locking, an efficient method to improve the spectral performance of semiconductor lasers without active stabilization, has already demonstrated its high potential for operation with single-longitude-mode fiber lasers. Recently, we have demonstrated significant line-narrowing (more than 1000 times) of the conventional low-cost DFB laser locked to an external fiber optic ring resonator. However, dynamical behavior of such a laser exhibits mode-hopping making its applications for distributed acoustic sensing rather questionable. In order to explore capacity of the injection locked laser for a phase-OTDR, we have designed a simple configuration of the injection locking DFB laser and applied it for detection and localization of perturbations with a phase-OTDR based distributed vibration sensor. The conventional DFB laser locked at critical coupling regime through fiber optic ring resonator of 3.75 m length (Free Spectral Range is 54.5 MHz) delivers CW mode-hoping free radiation with a linewidth of about ~5.0 kHz, i.e. ~200 times narrower than the linewidth of free-running laser. In combination with the moving differential processing algorithm such a laser is capable to provide high SNR distributed measurements of vibrations and dynamic strain perturbations. The fiber under test comprises three sections of standard single mode fiber, with a total length of ~4.5 km. Perturbations have been locally implemented into the test fiber at two positions using a shaker and a piezoelectric stretcher, respectively. In the first case, perturbations of the fiber induced by the shaker at a frequency of 815 Hz have been recognized as a peak in the recorded and processed traces with a signalto- noise ratio (SNR) of 12 dB over a 10 m resolution cell. In the second case, dynamical strain induced by the fiber stretcher over 40 m at a frequency of 3 kHz is shown in a similar pronounced peak with a signal-to-noise ratio (SNR) of 11 dB. These signatures are similar to the results obtained with a commercial 1 kHz linewidth laser employed with the same phase- OTDR setup. We believe that proposed solution could be a basis for development of a cost-effective phase-sensitive OTDR for distributed sensing specified for the distance up to tens of kilometers.

Proceedings Article | 4 May 2018 Paper

Surface plasmon polariton generation in a single-walled carbon nanotube

Sergey Moiseev, Yuliya Dadoenkova, Aleksei Kadochkin, Krassimir Panajotov, Andrei Fotiadi, Igor Zolotovskii

Proceedings Volume 10672, 106724M (2018) https://doi.org/10.1117/12.2311453

KEYWORDS: Surface plasmon polaritons, Electrons, Single walled carbon nanotubes, Carbon nanotubes, Phase velocity, Dispersion

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Proceedings Article | 26 February 2018 Paper

Fiber laser for application in phase sensitive optical time domain reflectometry

V. Spirin, J. L. Bueno Escobedo, D. Korobko, I. Zolotovskiy, C. López-Mercado, P. Mégret, A. Fotiadi

Proceedings Volume 10512, 105122F (2018) https://doi.org/10.1117/12.2288632

KEYWORDS: Fiber lasers, Reflectometry, Signal to noise ratio, Superposition, Laser resonators, Backscatter, Optical fibers, Interference (communication), Laser stabilization, Resonators

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Proceedings Article | 16 May 2017 Paper

Generation of intensive surface plasmon polariton pulses due to the induced modulation instability effect

Sergey Moiseev, Dmitry Korobko, Igor Zolotovskii, Andrei Fotiadi

Proceedings Volume 10228, 1022818 (2017) https://doi.org/10.1117/12.2265621

KEYWORDS: Plasmonics, Modeling and simulation, Nonlinear dynamics, Modulation, Dispersion, Dielectrics, Absorption, Metals, Nonlinear optics, Wave propagation, Surface plasmon polaritons, Radio propagation, Silver, Ultrafast phenomena

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Proceedings Article | 16 May 2017 Paper

Generation of wide spectrum and pedestal-free pulse compression in highly nonlinear dispersion increasing fiber

Andrew Fotiadi, Dmitry Korobko, Dmitrii Stoliarov, Alexey Sysoliatin, Igor Zolotovskii

Proceedings Volume 10228, 1022819 (2017) https://doi.org/10.1117/12.2265628

KEYWORDS: Frequency modulation

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Proceedings Article | 16 May 2017 Paper

Modulation instability of wave packets propagating in inhomogeneous nonlinear fiber

V. Lapin, A. Fotiadi

Proceedings Volume 10228, 102281A (2017) https://doi.org/10.1117/12.2265648

KEYWORDS: Waveguides, Dispersion, Frequency modulation, Fermium, Refractive index, Phase shift keying, Modulation, Nonlinear optics, Wave propagation, Solitons, Optical fibers, Ultrafast phenomena

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Proceedings Article | 16 May 2017 Paper

New fiber laser design for application in phase sensitive optical time domain reflectometry

J. L. Bueno Escobedo, V. Spirin, C. López-Mercado, A. Marquez Lucero, P. Mégret, I. Zolotovskii, A. Fotiadi

Proceedings Volume 10231, 1023129 (2017) https://doi.org/10.1117/12.2265980

KEYWORDS: Fiber lasers, Laser development, Acoustics, Sensors, Laser sources, Reflectometry, Laser resonators, Optical fibers, Resonators, Laser stabilization, Fiber optics, Spatial resolution

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Proceedings Article | 27 April 2016 Paper

Temporal and spectral compression of pulses in fibers with a running refractive index wave

I. Zolotovskii, V. Lapin, D. Sementsov, A. Fotiadi

Proceedings Volume 9894, 98941M (2016) https://doi.org/10.1117/12.2227886

KEYWORDS: Optical fibers, Frequency modulation, Modulation, Refractive index, Fermium, Wave propagation, Dispersion, Waveguides, Modulators, Telecommunications

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Proceedings Article | 27 April 2016 Paper

Optical fiber amplifier with spectral compression elements for high-power laser pulse generation

Andrei Fotiadi, Dmitry Korobko, Oleg Okhotnikov, Igor Zolotovskii

Proceedings Volume 9894, 989411 (2016) https://doi.org/10.1117/12.2223637

KEYWORDS: Optical amplifiers, High power lasers, Fiber amplifiers, High power fiber amplifiers, Scanning probe microscopy, Dispersion, Pulsed laser operation, Picosecond phenomena, Frequency modulation, Optical filters, Amplifiers, Systems modeling, Gaussian filters

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Proceedings Article | 21 April 2016 Paper

Resonance splitting effect in one-dimensional photonic crystal with nanocomposite layer

Sergey Moiseev, Vladimir Ostatochnikov, Andrei Fotiadi

Proceedings Volume 9885, 98851L (2016) https://doi.org/10.1117/12.2228056

KEYWORDS: Photonic crystals, Nanoparticles, Metals, Composites, Nanocomposites, Plasmons, Refractive index, Particles, Optical properties, Mirrors, Dielectrics, Silver, Plasmonics

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Proceedings Article | 21 April 2016 Paper

Induced modulation instability of surface plasmon polaritons in a layer structure of subwavelength thickness

Sergey Moiseev, Dmitry Korobko, Igor Zolotovskii, Andrei Fotiadi

Proceedings Volume 9884, 98843I (2016) https://doi.org/10.1117/12.2228069

KEYWORDS: Modulation, Picosecond phenomena, Surface plasmon polaritons, Nonlinear optics, Plasmons, Silver, Nanostructures, Waveguides, Radio propagation, Nanoplasmonic structures, Surface plasmon polaritons, Dielectrics, Dispersion, Wave propagation, Electrons

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Proceedings Article | 4 March 2015 Paper

Impact of chromatic dispersion and spectral filtering in an all-fiber mode-locked ytterbium laser

S. Boivinet, J.-B. Lecourt, Y. Hernandez, A. Fotiadi, M. Wuilpart, P. Mégret

Proceedings Volume 9344, 934421 (2015) https://doi.org/10.1117/12.2078865

KEYWORDS: Fiber Bragg gratings, Dispersion, Picosecond phenomena, Mode locking, Optical filters, Phase modulation, Fiber lasers, Polarizers, Pulsed laser operation, Polarization

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Proceedings Article | 4 March 2015 Paper

Self-injection locking of the DFB laser through ring fiber optic resonator

Vasily Spirin, Cesar López-Mercado, José Luis Bueno Escobedo, Alfredo Márquez Lucero, Igor Zolotovskii, Patrice Mégret, Andrei Fotiadi

Proceedings Volume 9344, 93442B (2015) https://doi.org/10.1117/12.2077886

KEYWORDS: Resonators, Fiber lasers, Fiber optics, Laser resonators, Polarization, Laser optics, Fiber optic communications, Fiber coupled lasers, Telecommunications, Optical fibers

Read Abstract +

Proceedings Article | 1 May 2014 Paper

948 kHz repetition rate, picosecond pulse duration, all-PM 1.03 µm mode-locked fiber laser based on nonlinear polarization evolution

S. Boivinet, J.-B. Lecourt, Y. Hernandez, A. Fotiadi, P. Mégret

Proceedings Volume 9135, 91351I (2014) https://doi.org/10.1117/12.2052108

KEYWORDS: Mode locking, Picosecond phenomena, Mirrors, Polarization, Pulsed laser operation, Phase modulation, Fermium, Frequency modulation, Fiber lasers, Polarizers

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Proceedings Article | 7 March 2014 Paper

Adjustment of double resonance in short cavity Brillouin fiber lasers

Cesar López-Mercado, Vasily Spirin, Sergey Kablukov, Ekaterina Zlobina, Igor Zolotovsky, Patrice Mégret, Andrei Fotiadi

Proceedings Volume 8961, 89612V (2014) https://doi.org/10.1117/12.2037938

KEYWORDS: Fiber lasers, Laser resonators, Laser optics, Laser scattering, Solids, Laser applications, Polarization, Single mode fibers, Q switched lasers, Scattering

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Proceedings Article | 20 May 2013 Paper

Comparison of simulated and experimental results for distributed radiation-induced absorption measurement using OFDR reflectometry

A. Faustov, Andrei Gusarov, L. Liokumovich, A. Fotiadi, M. Wuilpart, P. Mégret

Proceedings Volume 8794, 87943O (2013) https://doi.org/10.1117/12.2026786

KEYWORDS: Optical fibers, Backscatter, Reflectometry, Absorption, Radiation effects, Computer simulations, Temperature metrology, Aluminum, Sensors, Refractive index

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Proceedings Article | 8 May 2013 Paper

Double-frequency Brillouin fiber lasers

Vasily Spirin, Cesar López-Mercado, Damien Kinet, Ekaterina Zlobina, Sergei Kablukov, Patrice Mégret, Igor Zolotovskiy, Andrei Fotiadi

Proceedings Volume 8772, 87720U (2013) https://doi.org/10.1117/12.2017614

KEYWORDS: Fiber lasers, Laser stabilization, Semiconductor lasers, Laser optics, Laser resonators, Polarization, Interferometers, Optical fibers, Spatial light modulators, Optical isolators

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Proceedings Article | 3 May 2013 Paper

Remote distributed optical fibre dose measuring of high gamma-irradiation with highly sensitive Al- and P-doped fibres

A. Faustov, A. Gusarov, M. Wuilpart, A. Fotiadi, L. Liokumivich, I. Zolotovskiy, A. Tomashuk, T. de Schoutheete, P. Mégret

Proceedings Volume 8774, 877404 (2013) https://doi.org/10.1117/12.2017331

KEYWORDS: Optical fibers, Backscatter, Absorption, Annealing, Reflectometry, Temperature metrology, Switches, Signal attenuation, Distance measurement, Aluminum

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Proceedings Article | 26 February 2013 Paper

Passively stabilized Brillouin fiber lasers with doubly resonant cavities

Vasily Spirin, Cesar López-Mercado, Damien Kinet, Patrice Mégret, Igor Zolotovskiy, Andrei Fotiadi

Proceedings Volume 8601, 860135 (2013) https://doi.org/10.1117/12.2005172

KEYWORDS: Fiber lasers, Laser stabilization, Semiconductor lasers, Laser optics, Laser resonators, Interferometers, Polarization, Spatial light modulators, Optical isolators, Feedback loops

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Proceedings Article | 26 February 2013 Paper

Dynamics of ultra-long Brillouin fiber laser

Andrei Fotiadi, Ivan Lobach, Patrice Mégret

Proceedings Volume 8601, 86011K (2013) https://doi.org/10.1117/12.2003186

KEYWORDS: Fiber Bragg gratings, Random lasers, Oscilloscopes, Fiber lasers, Optical fibers, Backscatter, Laser scattering, Mirrors, Rayleigh scattering, Scattering

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Proceedings Article | 9 May 2012 Paper

Monitoring of gamma-irradiated Yb-doped optical fibers through pump induced refractive index changes effect

Andrei Fotiadi, Irina Petukhova, Patrice Mégret, Alexey Shubin, Alexander Tomashuk, Sergey Novikov, Christina Borisova, Igor Zolotovskiy, Oleg Antipov, Krassimir Panajotov, Hugo Thienpont

Proceedings Volume 8439, 84390G (2012) https://doi.org/10.1117/12.922316

KEYWORDS: Optical fibers, Phase shifts, Color centers, Refractive index, Sensors, Ytterbium, Absorption, Ions, Polarizability, Gamma radiation

Read Abstract +

We discuss a radioactivity sensing based on monitoring of color centers formation in Yb-doped fiber under gamma irradiation. New method exploits the dynamic effect of refractive index changes (RIC) induced by laser pumping into the fiber absorption band. In our experiment four identical samples of the single-mode aluminum silicate Yb-doped optical fiber have been γ-irradiated with different doses from a ⁶⁰Co source. All fibers passed the test in the intereferometric setup for the purpose of the pump induced RIC effect. During the test the phase shifts induced in the fiber by 1-mssquare pump pulses at 980 nm were recorded with a probe signal at eleven different wavelengths ranging from ~1.46 to ~1.61 μm. The phase traces have been normalized to their maximum values and averaged over 100 traces for each probe wavelength and also over all probe wavelengths. The averaged phase traces highlight the differences in their growing and decaying parts in respect to the case of non-irradiated fibers. These differences are found to be in correlation with the fiber irradiation dose. For non-irradiated fibers decay parts are perfectly fitted by one exponential function with the relaxation time constant equal to the Yb-ion excited state life-time ~750 μs, to be the same for all fiber samples. However, for irradiated fibers the similar fitting gives a triple exponential decay with time constants estimated as ~750, ~500 and 40μs. For higher irradiation dose the difference with one exponential fitting is more pronounced. Having in mind that the obtained difference in phase shift dynamics could be associated with excitation of some color centers induced in the fiber matrix by gamma irradiation, we represent the normalized phase shifts as a superposition of two contributions. The first contribution is due to excitation of Yb-ion, the same for all fiber samples. The second is due to excitation of color centers. The amplitude of the second part highlights a degree of fiber degradation under gamma radiation and is directly proportional to the concentration of the excited color centers that, in its turn, linearly grows with the irradiation dose. Therefore, new method is regarded as a good candidate for potential applications in fiber dosimeters.

Proceedings Article | 9 May 2012 Paper

Distributed optical fibre temperature measurements in a low dose rate radiation environment based on Rayleigh backscattering

A. Faustov, A. Gussarov, M. Wuilpart, A. Fotiadi, L. Liokumovich, O. Kotov, I. Zolotovskiy, A. Tomashuk, T. Deschoutheete, P. Mégret

Proceedings Volume 8439, 84390C (2012) https://doi.org/10.1117/12.922082

KEYWORDS: Temperature metrology, Optical fibers, Backscatter, Optical testing, Calibration, Environmental sensing, Sensors, Picosecond phenomena, Radiation effects, Rayleigh scattering

Read Abstract +

Proceedings Article | 25 May 2007 Paper

Wavelength dependent polarization properties of a long-period grating inscribed in a pure-fused-silica photonic crystal fiber

C. Caucheteur, A. Fotiadi, P. Mégret, G. Brambilla, S. Slattery, D. Nikogosyan

Proceedings Volume 6588, 65880H (2007) https://doi.org/10.1117/12.722772

KEYWORDS: Polarization, Photonic crystal fibers, Femtosecond phenomena, Modulation, Cladding, Structured optical fibers, Ultraviolet radiation, Silica, Photonic crystals, Optical fibers

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Proceedings Article | 25 April 2006 Paper

Polarization properties of long-period gratings prepared by high-intensity femtosecond 352nm pulses

S. Slattery, D. Nikogosyan, C. Caucheteur, A. Fotiadi, P. Mégret

Proceedings Volume 6187, 618707 (2006) https://doi.org/10.1117/12.662543

KEYWORDS: Polarization, Femtosecond phenomena, Cladding, Carbon dioxide lasers, Ultraviolet radiation, Absorption, Fiber lasers, Neodymium glass lasers, Annealing, Near ultraviolet

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Proceedings Article | 17 April 2006 Paper

Iterative resonator model describing the continuous-wave operation of a Raman laser

Nathalie Vermeulen, Andrei Fotiadi, Christof Debaes, Krassimir Panajotov, Hugo Thienpont

Proceedings Volume 6190, 61900Q (2006) https://doi.org/10.1117/12.663599

KEYWORDS: Resonators, Raman spectroscopy, Laser resonators, Photons, Einsteinium, Raman scattering, Continuous wave operation, Mirrors, Laser scattering, Mathematical modeling

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Proceedings Article | 3 May 2004 Paper

Multi-cascaded SBS in an optical fiber supported by Rayleigh backscattering

Andrei Fotiadi, Gautier Ravet, Patrice Mégret, Michel Blondel

Proceedings Volume 5480, (2004) https://doi.org/10.1117/12.558562

KEYWORDS: Optical fibers, Remote sensing, Rayleigh scattering, Scattering, Backscatter, Numerical simulations, Wave propagation, Data modeling, Laser scattering

Read Abstract +

Proceedings Article | 3 May 2004 Paper

Generation of gigantic nanosecond pulses through Raman-Brillouin-Rayleigh cooperative process in single-mode optical fiber

Gautier Ravet, Andrei Fotiadi, Patrice Mégret, Michel Blondel

Proceedings Volume 5480, (2004) https://doi.org/10.1117/12.558571

KEYWORDS: Raman spectroscopy, Fiber lasers, Raman scattering, Mirrors, Single mode fibers, Rayleigh scattering, Remote sensing, Continuous wave operation, Optical isolators, Optical fibers

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Proceedings Article | 19 November 2003 Paper

Stimulated Brillouin scattering in optical fibers and fiber lasers: 1-D dynamics

Andrei Fotiadi, Patrice Megret, Michel Blondel

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.527068

KEYWORDS: Fiber lasers, Optical fibers, Single mode fibers, Rayleigh scattering, Q switches, Laser scattering, Scattering, Remote sensing, Hole burning spectroscopy, Oscilloscopes

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Proceedings Article | 6 October 2003 Paper

Self-Q-switched fiber lasers with Rayleigh/SBS ring mirrors

Andrei Fotiadi, Patrice Megret, Michel Blondel, Dmitrii Grukh, Andrei Kurkov, Igor Razdobreev

Proceedings Volume 5137, (2003) https://doi.org/10.1117/12.517930

KEYWORDS: Fiber lasers, Mirrors, Q switches, Resonators, Fiber Bragg gratings, Pulsed laser operation, Rayleigh scattering, Laser scattering, Oscilloscopes, Single mode fibers

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Proceedings Article | 9 March 2001 Paper

Dynamics of passive Q-switching in SBS/Er fiber laser at low-pump-power

Andrei Fotiadi, Olivier Deparis, Roman Kiyan, Stanislav Chernikov, Aris Ikiades

Proceedings Volume 4354, (2001) https://doi.org/10.1117/12.418818

KEYWORDS: Fiber lasers, Single mode fibers, Q switches, Oscilloscopes, Resonators, Computer simulations, Backscatter, Rayleigh scattering, Pulsed laser operation, Semiconductor lasers

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Proceedings Article | 26 November 1999 Paper

Q-switching dynamics in SBS/Er fiber laser with low-power pump

Andrei Fotiadi, Aris Ikiades, Nikos Vainos, Olivier Deparis, Roman Kiyan

Proceedings Volume 3847, (1999) https://doi.org/10.1117/12.371244

KEYWORDS: Fiber lasers, Q switches, Resonators, Oscilloscopes, Single mode fibers, Laser scattering, Backscatter, Pulsed laser operation, Rayleigh scattering, Semiconductor lasers

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Proceedings Article | 20 September 1999 Paper

Reciprocity and conjugation fidelity in double phase conjugate mirrors

Philippe Delaye, Andrei Fotiadi, Gerald Roosen

Proceedings Volume 3801, (1999) https://doi.org/10.1117/12.363924

KEYWORDS: Phase conjugation, Mirrors, Wave propagation, Signal detection, Crystals, Multimode fibers, Single mode fibers, Optical filters, Diffraction, Polarization

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Proceedings Article | 28 January 1999 Paper

SBS lasing caused by double Rayleigh scattering in fibers

Andrei Fotiadi, Roman Kiyan

Proceedings Volume 3733, (1999) https://doi.org/10.1117/12.340101

KEYWORDS: Optical fibers, Rayleigh scattering, Interferometers, Oscilloscopes, Single mode fibers, Numerical simulations, Scattering, Remote sensing, Modulation, Correlation function

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Proceedings Article | 6 January 1999 Paper

Backward light scattering in fiber lasers

Andrei Fotiadi, Roman Kiyan, Stanislav Chernikov

Proceedings Volume 3685, (1999) https://doi.org/10.1117/12.335842

KEYWORDS: Fiber lasers, Laser resonators, Rayleigh scattering, Optical fibers, Light scattering, Resonators, Interferometers, Scattering, Oscilloscopes, Birefringence

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