Dr. Koji Nonaka Profile

Dr. Koji Nonaka

Associate Professor at Kochi Univ. of Technology

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Author

Publications (10)

Proceedings Article | 2 June 2014 Paper

Suppression of polarization instability in optical pulse correlation remote sensing

Mifang Lu, Hirokazu Kobayashi, Koji Nonaka

Proceedings Volume 9157, 91571V (2014) https://doi.org/10.1117/12.2059718

KEYWORDS: Polarization, Remote sensing, Optical sensing, Optical testing, Sensing systems, Second-harmonic generation, Fiber optics sensors, Optical fibers, Modulation, Technetium

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Proceedings Article | 20 May 2013 Paper

Fiber optic liquid-level sensor using a long fiber Bragg grating

Amelia Ricchiuti, David Barrera, Koji Nonaka, Salvador Sales

Proceedings Volume 8794, 87941J (2013) https://doi.org/10.1117/12.2026686

KEYWORDS: Fiber Bragg gratings, Liquids, Sensors, Fiber optics sensors, Picosecond phenomena, Spatial resolution, Oscilloscopes, Fiber optics, Time-frequency analysis, Optical fibers

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Proceedings Article | 7 November 2012 Paper

Suppression of long distance instability on remote sensing signal of pulse correlation measurement in optical fiber sensing

H. Kobayashi, T. Tsuzuki, T. Onishi, Y. Masaoka, X. Xu, K. Nonaka

Proceedings Volume 8421, 84216G (2012) https://doi.org/10.1117/12.975127

KEYWORDS: Optical fibers, Remote sensing, Sensing systems, Temperature metrology, Optical sensing, Fiber optics sensors, Optical amplifiers, Optical testing, Sensors, Structural health monitoring

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Proceedings Article | 17 October 2012 Paper

Region selectable gas sensing for long distance pipeline maintenance

Mifang Lu, Koji Nonaka, Hirokazu Kobayashi, Jun Yang, Libo Yuan

Proceedings Volume 8421, 84212C (2012) https://doi.org/10.1117/12.970265

KEYWORDS: Absorption, Fiber Bragg gratings, Sensing systems, Gas sensors, Fiber optics sensors, Sensors, Gases, Fiber optics, Spectrum analysis, Signal detection

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Proceedings Article | 5 October 2009 Paper

Regional selectable distributed sensor based on reflected optical pulse correlation measurement

Xunjian Xu, Koji Nonaka

Proceedings Volume 7503, 75036J (2009) https://doi.org/10.1117/12.835097

KEYWORDS: Sensors, Sensing systems, Reflectors, Optical testing, Modulation, Second-harmonic generation, Temperature metrology, Time metrology, Avalanche photodetectors, Fiber optics sensors

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Proceedings Article | 5 October 2009 Paper

Novel system to interrogate distributed fiber strain sensors and point temperature sensors based on pulse correlation and FBGs

Antonio Bueno, Koji Nonaka, Salvador Sales

Proceedings Volume 7503, 75032L (2009) https://doi.org/10.1117/12.835281

KEYWORDS: Sensors, Fiber Bragg gratings, Fiber optics sensors, Temperature sensors, Laser sources, Picosecond phenomena, Distributed computing, Temperature metrology, Optical components, Optical sensing

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Proceedings Article | 3 April 2008 Paper

Widely tunable ultraviolet C generation using wavelength selective external high-Q-cavity and a blue laser diode system

C. Tangtrongbenchasil, K. Nonaka

Proceedings Volume 6793, 679306 (2008) https://doi.org/10.1117/12.798952

KEYWORDS: Crystals, Nonlinear crystals, Mirrors, Ultraviolet radiation, Laser crystals, Semiconductor lasers, Crystal optics, Second-harmonic generation, Fabry–Perot interferometers, Confocal microscopy

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Proceedings Article | 1 November 2007 Paper

A novel stable and high-sensitivity fiber strain sensor based on optical pulse correlation measurement

Hongbin Song, Koji Nonaka

Proceedings Volume 6423, 64230N (2007) https://doi.org/10.1117/12.779310

KEYWORDS: Single mode fibers, Coating, Polarization, Sensing systems, Fiber coatings, Optical fibers, Birefringence, Optical testing, Picosecond phenomena, Fiber optics sensors

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Proceedings Article | 23 May 2005 Paper

Optical pulse timing drift sensing for fiber delay monitoring using pulse correlation and differential detection

Koji Nonaka, Minako Sako, Toshinori Suzuki

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623434

KEYWORDS: Picosecond phenomena, Signal detection, Second-harmonic generation, Sensors, Data communications, Receivers, Control systems, Temperature metrology, Fiber optics sensors, Signal generators

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Proceedings Article | 7 May 2004 Paper

High-speed optical wireless access with a smart beam control mechanism

Koji Nonaka, Masanori Hamada, Yoshiyuki Isobe

Proceedings Volume 5281, (2004) https://doi.org/10.1117/12.521129

KEYWORDS: Signal detection, Beam controllers, Vertical cavity surface emitting lasers, Modulation, Receivers, Data communications, Amplitude modulation, Control systems, Telecommunications, Signal processing

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Showing 5 of 10 publications

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