Dr. Kazuhisa Ogawa Profile

Dr. Kazuhisa Ogawa

at Hokkaido Univ

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Author

Publications (6)

Proceedings Article | 17 February 2020 Presentation + Paper

Three-dimensional tomographic imaging and quantitative phase measurement using virtual phase conjugation

Satoshi Kawashima, Atsushi Okamoto, Tomohiro Maeda, Kazuhisa Ogawa, Akihisa Tomita, Ryusuke Osaki, Naoki Hayashi

Proceedings Volume 11245, 1124510 (2020) https://doi.org/10.1117/12.2545353

KEYWORDS: Tomography, Phase conjugation, Phase measurement, 3D image processing, Distortion, Wavefronts, Computer programming

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Proceedings Article | 31 January 2020 Presentation + Paper

Spatial mode exchange technique using volume holograms with a random optical diffuser to reduce modal cross-talks

Shuanglu Zhang, Atsushi Okamoto, Taijun Shiba, Hotaka Hayashi, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, Yuta Goto, Naoya Wada

Proceedings Volume 11309, 1130909 (2020) https://doi.org/10.1117/12.2545600

KEYWORDS: Holograms, Volume holography, Diffusers, Multiplexing, Optical communications, Modulation, Digital micromirror devices, Holography, Numerical simulations, Telecommunications

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Proceedings Article | 31 January 2020 Presentation + Paper

Mode-selective switch for ROADM using volume holograms and spatial light modulator

Hotaka Hayashi, Atsushi Okamoto, Tomohiro Maeda, Taijun Shiba, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, Yuta Goto, Naoya Wada

Proceedings Volume 11309, 1130908 (2020) https://doi.org/10.1117/12.2544685

KEYWORDS: Switches, Holograms, Volume holography, Spatial light modulators, Signal to noise ratio, Multiplexing, Switching, Diffraction, Multiplexers, Single mode fibers

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Proceedings Article | 31 January 2020 Presentation + Paper

Collective measurement of DMD in 6-mode 19-core fiber using low-coherence digital holography

Yuta Abe, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita, Daiki Soma, Yuta Wakayama, Takehiro Tsuritani

Proceedings Volume 11309, 1130904 (2020) https://doi.org/10.1117/12.2545360

KEYWORDS: Single mode fibers, Digital holography, Fourier transforms, Space division multiplexing, Fiber optic communications

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Proceedings Article | 29 January 2018 Presentation + Paper

Measurement of differential mode delay using reference-free low-coherence digital holography

Shogo Hoshino, Atsushi Okamoto, Yuta Goto, Kazuhisa Ogawa, Akihisa Tomita, Yuta Wakayama, Takehiro Tsuritani

Proceedings Volume 10561, 105610D (2018) https://doi.org/10.1117/12.2288096

KEYWORDS: Digital micromirror devices, Digital holography, Single mode fibers, Spatial filters, Cameras, Beam splitters, Multiplexing, Lenses, Light sources, Fourier transforms

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Proceedings Article | 29 January 2018 Presentation + Paper

Selective spatial mode attenuator using phase-intensity-phase modulation toward mode-division multiplexing transmission

Zihan Zhou, Atsushi Okamoto, Shimpei Shimizu, Akihisa Tomita, Kazuhisa Ogawa, Yuta Wakayama, Takehiro Tsuritani

Proceedings Volume 10561, 105610H (2018) https://doi.org/10.1117/12.2288125

KEYWORDS: Modulation, Phase shift keying, Signal attenuation, Multiplexing, Attenuators, Optical amplifiers, Numerical simulations, Channel projecting optics, Optical fibers

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Showing 5 of 6 publications

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