Prof. Takasumi Tanabe Profile

Prof. Takasumi Tanabe

Professor at Keio Univ

SPIE Involvement:

Conference Program Committee | Author

Proceedings Article | 15 March 2023 Presentation + Paper

Synchronization of microresonator frequency combs in chaotic regime

David Moreno, Shun Fujii, Ayata Nakashima, Atsushi Uchida, Pablo Sanchis, Takasumi Tanabe

Proceedings Volume 12407, 1240708 (2023) https://doi.org/10.1117/12.2649557

KEYWORDS: Microresonators, Simulations, Frequency combs, Resonators, Modulation, Microrings, Chaos, Attenuators, Video, Spectroscopy

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Proceedings Article | 5 March 2021 Presentation + Paper

Fabrication of dispersion engineered ultrahigh-Q crystalline optical microresonator for broad-bandwidth optical parametric oscillation

Shun Fujii, Koshiro Wada, Yasuhiro Kakinuma, Takasumi Tanabe

Proceedings Volume 11672, 1167209 (2021) https://doi.org/10.1117/12.2579393

KEYWORDS: Crystal optics, Optical parametric oscillators, Optical engineering, Microresonators, Crystals

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Proceedings Article | 2 March 2020 Presentation + Paper

Experimental and numerical demonstration of tunable octave-wide four-wave mixing in dispersion engineered microresonators

Shun Fujii, Takasumi Tanabe

Proceedings Volume 11274, 112740M (2020) https://doi.org/10.1117/12.2550563

KEYWORDS: Microresonators, Resonators, Dispersion, Optical parametric oscillators, Silica, Crystals, Four wave mixing, Frequency combs, Terahertz radiation, Numerical simulations

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Proceedings Article | 4 March 2019 Presentation + Paper

Kerr comb generation in a mode coupled system

Takasumi Tanabe, Shun Fujii, Ryo Suzuki

Proceedings Volume 10904, 109040M (2019) https://doi.org/10.1117/12.2513784

KEYWORDS: Solitons, Optical microcavities, Modulation, Frequency combs, Silica, Dispersion, Continuous wave operation, Microresonators, Electronics, Electrical engineering

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Proceedings Article | 16 February 2018 Presentation + Paper

Saturable absorption by carbon nanotubes on silica microtoroids for stable mode locking

Tsutaru Kumagai, Naoya Hirota, Katsuya Sato, Koki Namiki, Atsuhiro Hori, Hideyuki Maki, Takasumi Tanabe

Proceedings Volume 10518, 105180H (2018) https://doi.org/10.1117/12.2291874

KEYWORDS: Saturable absorption, Mode locking, Chemical vapor deposition, Optical microcavities, Carbon nanotubes

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Proceedings Article | 2 January 2018 Paper

Investigation of the influence of the proximity effect and randomness on a photolithographically fabricated photonic crystal nanobeam cavity

Tomohiro Tetsumoto, Hajime Kumazaki, Rammaru Ishida, Takasumi Tanabe

Proceedings Volume 10456, 104561Y (2018) https://doi.org/10.1117/12.2283389

KEYWORDS: Silicon, Silicon photonics, Silica, Optical properties, Photomasks, Nanolithography, Photonic crystals, Scanning electron microscopy, Cladding, Fabrication

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Proceedings Article | 20 February 2017 Presentation + Paper

Effect of Raman scattering and mode coupling in Kerr comb generation in a silica whispering gallery mode microcavity

Takasumi Tanabe, Takumi Kato, Shun Fujii, Ryo Suzuki, Atsuhiro Hori

Proceedings Volume 10090, 100900F (2017) https://doi.org/10.1117/12.2250231

KEYWORDS: Raman scattering, Optical microcavities, Silica, Raman spectroscopy, Four wave mixing, Visible radiation, Third-harmonic generation, Solitons, Phase modulation, Microresonators, Terahertz radiation, Modulation, Optical fibers, Frequency combs

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Proceedings Article | 22 April 2016 Paper

Harmonic mode locking in a high-Q whispering gallery mode microcavity

Takasumi Tanabe, Takumi Kato, Tomoya Kobatake, Ryo Suzuki, Akitoshi Chen-Jinnai

Proceedings Volume 9727, 97270C (2016) https://doi.org/10.1117/12.2208754

KEYWORDS: Mode locking, Optical microcavities, Nonlinear optics, Kerr effect, Modulation, Raman spectroscopy, Silica, Bistability, Four wave mixing, Microresonators, Numerical analysis, Resonators, Radio optics, Solitons, Complex systems, Fiber lasers

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Proceedings Article | 22 April 2016 Paper

Time-domain observation of strong coupling between counter-propagating ultra-high Q whispering gallery modes

Wataru Yoshiki, Akitoshi Chen-Jinnai, Tomohiro Tetsumoto, Shun Fujii, Takasumi Tanabe

Proceedings Volume 9727, 97271T (2016) https://doi.org/10.1117/12.2208873

KEYWORDS: Optical microcavities, Silica, Microresonators, Light-matter interactions, Photons, Nanotechnology, Quantum networks, Scattering, Optical fibers, Rectangular pulse, Signal detection, Resonators, Solids, Transmittance

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Proceedings Article | 14 March 2016 Paper

Fiber-coupled photonic crystal nanocavity for reconfigurable formation of coupled cavity system

Tomohiro Tetsumoto, Yuta Ooka, Takasumi Tanabe

Proceedings Volume 9756, 97561J (2016) https://doi.org/10.1117/12.2212255

KEYWORDS: Nanofibers, Photonic crystals, Optical resonators, Optical fibers, Silicon, Nanostructures, Fiber couplers, Optical signal processing, Signal processing

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Proceedings Article | 10 February 2009 Paper

All-optical switches and bistable devices using high-Q photonic crystal nanocavities

Takasumi Tanabe, Akihiko Shinya, Eiichi Kuramochi, Hideaki Taniyama, Masaya Notomi

Proceedings Volume 7219, 72190H (2009) https://doi.org/10.1117/12.811081

KEYWORDS: Picosecond phenomena, Bistability, Switching, Silicon, Switches, Photonic crystals, Photons, Refractive index, Signal processing, Optical storage

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Proceedings Article | 11 November 2008 Paper

Applications of nonlinear effects in silicon wire waveguides: all-optical modulation, wavelength conversion, and quantum entanglement

K. Yamada, T. Tsuchizawa, T. Watanabe, H. Fukuda, H. Shinojima, H. Nishi, H. Takesue, T. Tanabe, A. Shinya, E. Kuramochi, M. Notomi, Y. Tokura, S. Itabashi

Proceedings Volume 7134, 71341R (2008) https://doi.org/10.1117/12.803760

KEYWORDS: Waveguides, Silicon, Modulation, Silicon photonics, Switching, Picosecond phenomena, Absorption, Interferometers, Photonic crystals, Wave propagation

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Proceedings Article | 25 March 2005 Paper

Ultrasmall resonant tunneling/dropping devices in 2D photonic crystal slabs

Akihiko Shinya, Satoshi Mitsugi, Eiichi Kuramochi, Takasumi Tanabe, G. Kim, Go Kira, Shingo Kondo, Kouji Yamada, Toshifumi Watanabe, Tai Tsuchizawa, Masaya Notomi

Proceedings Volume 5729, (2005) https://doi.org/10.1117/12.592631

KEYWORDS: Waveguides, Resonators, Photonic crystals, Optical filters, Nonlinear filtering, Optical switching, Light wave propagation, Silicon, Switching, Cladding

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Proceedings Article | 8 October 2004 Paper

Toward nanostructuring with femtosecond laser pulses

Juergen Koch, Takasumi Tanabe, Frank Korte, Carsten Fallnich, Andreas Ostendorf, Boris Chichkov

Proceedings Volume 5662, (2004) https://doi.org/10.1117/12.596773

KEYWORDS: Femtosecond phenomena, Nanostructuring, Nanolithography, Laser ablation, Metals, Nanostructures, Photons, Diffraction, Laser damage threshold, Laser systems engineering

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Showing 5 of 14 publications

Conference Committee Involvement (1)

Nano-optoelectronics and Micro/Nano-photonics X

13 October 2024 | Nantong, Jiangsu, China

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