Prof. Hiroshi Yasaka Profile

Prof. Hiroshi Yasaka

at Tohoku Univ

SPIE Involvement:

Author

Publications (7)

Proceedings Article | 3 October 2022 Presentation + Paper

Injection-locked spin-VCSELs for coherent optical communications

Nobuhide Yokota, Kazuhiro Ikeda, Hiroshi Yasaka

Proceedings Volume 12205, 1220509 (2022) https://doi.org/10.1117/12.2632872

KEYWORDS: Modulation, Vertical cavity surface emitting lasers, Optical communications, Spin polarization, Oscillators, Polarization, Telecommunications, Electrons, Birefringence, Picosecond phenomena

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Proceedings Article | 1 August 2021 Presentation + Paper

Spin-VCSELs for analog radio-over-fiber systems in 5G and beyond

Nobuhide Yokota, Kazuhiro Ikeda, Hiroshi Yasaka

Proceedings Volume 11805, 1180512 (2021) https://doi.org/10.1117/12.2593865

KEYWORDS: Modulation, Signal detection, Orthogonal frequency division multiplexing, Spin polarization, Signal generators, Radio over Fiber, Polarizers, Vertical cavity surface emitting lasers, Polarization

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Proceedings Article | 20 August 2020 Presentation + Paper

Numerical investigation of direct IQ modulation of spin-VCSELs for coherent communications

Nobuhide Yokota, Kazuhiro Ikeda, Hiroshi Yasaka

Proceedings Volume 11470, 114702I (2020) https://doi.org/10.1117/12.2567380

KEYWORDS: Modulation, Quadrature amplitude modulation, Polarizers, Polarization, Vertical cavity surface emitting lasers, Spin polarization, Birefringence, Modulators, Amplitude modulation

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Proceedings Article | 16 September 2019 Paper

Spin polarization modulation of 1.55-μm VCSELs for high-speed data communications

Nobuhide Yokota, Kunpei Nisaka, Kazuhiro Ikeda, Hiroshi Yasaka

Proceedings Volume 11090, 1109036 (2019) https://doi.org/10.1117/12.2529785

KEYWORDS: Modulation, Vertical cavity surface emitting lasers, Polarization, Spin polarization, Modulators, Data communications, Phase shift keying, Polarizers, Phase modulation, Quantum wells

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Proceedings Article | 28 April 2016 Paper

Phase noise reduction in semiconductor lasers by optical negative feedback

Hiroshi Yasaka, Konosuke Aoyama, Nobuhide Yokota

Proceedings Volume 9892, 98920D (2016) https://doi.org/10.1117/12.2230219

KEYWORDS: Semiconductor lasers, Negative feedback, Laser optics, Optical filters, Frequency modulation, Fermium, Laser resonators, Fabry–Perot interferometers, Reflectivity

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Proceedings Article | 25 October 2005 Paper

InP-based high-speed Mach-Zehnder modulator

N. Kikuchi, K. Tsuzuki, E. Yamada, H. Yasaka, T. Ishibashi

Proceedings Volume 6014, 601409 (2005) https://doi.org/10.1117/12.630438

KEYWORDS: Modulators, Electrodes, Waveguides, Signal attenuation, Eye, Single mode fibers, Cladding, Phase shifts, Refractive index, Heterojunctions

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Proceedings Article | 1 April 1996 Paper

Wavelength-tunable duplex integrated light source

Hiroshi Okamoto, Hiroshi Yasaka, Kunishige Oe

Proceedings Volume 2684, (1996) https://doi.org/10.1117/12.236939

KEYWORDS: Light sources, Switching, Wavelength tuning, Optical switching, Modulators, Waveguides, Thermal effects, Modulation, Picosecond phenomena, Signal attenuation

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Showing 5 of 7 publications

Conference Committee Involvement (2)

Active and Passive Optical Components for Communications VII

11 September 2007 | Boston, MA, United States

Active and Passive Optical Components for Communications VI

3 October 2006 | Boston, Massachusetts, United States

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