Dr. Tsukuru Katsuyama Profile

Dr. Tsukuru Katsuyama

at Tokyo Institute of Technology

SPIE Involvement:

Author

Proceedings Article | 1 February 2019 Paper

Mid-infrared gas sensing using uncooled quantum cascade laser with low power consumption

Makoto Murata, Hiroyuki Yoshinaga, Takashi Kato, Hiroki Mori, Yukihiro Tsuji, Masaki Migita, Jun-ichi Hashimoto, Mitsuru Ekawa, Yasuhiro Iguchi, Tsukuru Katsuyama

Proceedings Volume 10926, 109262O (2019) https://doi.org/10.1117/12.2509039

KEYWORDS: Quantum cascade lasers, Absorption, Mid-IR, Light sources, Continuous wave operation, Cooling systems, Sensors, Molecules

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Proceedings Article | 26 January 2018 Paper

Compact and low power-consumption MIR DFB-QCL with To-CAN package for portable sensor

Makoto Murata, Hiroyuki Yoshinaga, Masaki Migita, Hiroki Mori, Yukihiro Tsuji, Takashi Kato, Jun-ichi Hashimoto, Mitsuru Ekawa, Yasuhiro Iguchi, Tsukuru Katsuyama

Proceedings Volume 10540, 105401O (2018) https://doi.org/10.1117/12.2287696

KEYWORDS: Quantum cascade lasers, Absorption, Sensors, Mid-IR, Molecules, Light sources, Gas sensors

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Proceedings Article | 3 May 2017 Presentation + Paper

Performance estimation for SWIR cameras under OH night airglow illumination

Naoki Oda, Masahiko Sano, Sota Kagami, Yoshihiro Nambu, Tomo Tanaka, Tsuyoshi Yamamoto, Hiroshi Inada, Yasuhiro Iguchi, Tsukuru Katsuyama

Proceedings Volume 10177, 1017702 (2017) https://doi.org/10.1117/12.2261052

KEYWORDS: Skin, Staring arrays, Cameras, Signal to noise ratio, Short wave infrared radiation, Indium gallium arsenide, Airglow, Superlattices, Infrared cameras, Vegetation, Electrons, Sensors

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Proceedings Article | 13 February 2016 Paper

Stray light suppression in InGaAs/GaAsSb type-II FPA

Sundararajan Balasekaran, Masaki Migita, Takahiko Kawahara, Ken-ichi Machinaga, Kouhei Miura, Hiroshi Inada, Yasuhiro Iguchi, Tsukuru Katsuyama

Proceedings Volume 9755, 97551Z (2016) https://doi.org/10.1117/12.2213971

KEYWORDS: Staring arrays, Stray light, Sensors, Epoxies, Quantum wells, Short wave infrared radiation, Coating, Readout integrated circuits, Nonuniformity corrections, Aluminum nitride

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Proceedings Article | 13 February 2016 Paper

Mid-infrared quantum cascade laser integrated with distributed Bragg reflector

Hiroyuki Yoshinaga, Jun-ichi Hashimoto, Hiroki Mori, Yukihiro Tsuji, Makoto Murata, Mitsuru Ekawa, Tsukuru Katsuyama

Proceedings Volume 9755, 97552V (2016) https://doi.org/10.1117/12.2212332

KEYWORDS: Quantum cascade lasers, Mid-IR, Distributed Bragg reflectors, Semiconductors, Light sources, Reflectivity, Superlattices, Semiconducting wafers, Waveguides, Continuous wave operation, Absorption, Gas sensors, Surgery

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Proceedings Article | 8 February 2015 Paper

Low power-consumption quantum cascade lasers

Tsukuru Katsuyama, Jun-ichi Hashimoto, Hiroyuki Yoshinaga, Hiroki Mori, Yukihiro Tsuji, Makoto Murata, Mitsuru Ekawa, Toshiyuki Tanahashi

Proceedings Volume 9370, 93700F (2015) https://doi.org/10.1117/12.2077523

KEYWORDS: Quantum cascade lasers, Reflectivity, Gold, Gas sensors, Continuous wave operation, Absorption, Surgery, Dielectrics, Light sources, Mid-IR

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Proceedings Article | 31 January 2005 Paper

OMVPE-grown GaInNAs lasers and SOAs operating at 1.3 um region

Tsukuru Katsuyama, Takashi Yamada, Jun-ichi Hashimoto, Michio Murata, Kenji Koyama, Masashi Ito, Yasushiro Iguchi, Shigenori Takagishi, Akira Ishida

Proceedings Volume 5624, (2005) https://doi.org/10.1117/12.579806

KEYWORDS: Photonic integrated circuits, Gallium arsenide, Quantum wells, Laser damage threshold, Reflectivity, Coating, Cladding, Temperature metrology, Semiconducting wafers, Optical communications

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Progress of information technology in recent years has led to a rapid expansion in data communication capacity and there has been a strong demand for constructing cost-effective and high-performance optical communication systems. Photonic integrated circuit (photonic IC) technology has offered solutions for these requirements by eliminating the individual packaging and optical connections between devices. This approach is expected not only to reduce the cost, size, and power consumption but also to realize new functions that can never be possible with conventional discrete devices. For the practical use of photonic ICs, it is desirable that they can be used under uncooled conditions and are highly productive. However, it seems difficult for conventional InP-based devices to satisfy these requirements because their temperature characteristics are insufficient due to a weak electron confinement in the active region. In addition, at present, InP substrates used for production are mainly 2 or 3 inches in diameter and it is difficult to enlarge the wafer size with maintaining the quality and mechanical strength. GaInNAs, which has been developed recently as an alternative semiconductor material in the long-wavelength region, seems to be the best candidate to satisfy these requirements. It covers bandgaps corresponding to the wavelength from 1.3 μm to 1.6 μm with lattic-matched to GaAs, which leads to the following advantages. First low-cost and large-scale integrations can be realized with high productivity due to the usage of large GaAs substrates of up to 6 inches in diameter and well-established Ga-As-based process technology. Second as well known in GaInNAs lasers, much stronger electron confinement in the active layer can be realized. Therefore GaInNAs-based devices are expected to have larger gain and better temperature characteristics comparing with conventional InP-based devices. In addition, the low Auger recombination rate and large effective mass of electron would also improve gain and temperature characteristics. The crystal quality of GaInNAs has been improved rapidly in several years. Threshold current densities of GaInNAs lasers have been reduced more than one figure and both molecular beam epitaxy (MBE) and organometallic vapor phase epitaxy (OMVPE) can provide high quality GaInNAs as shown in figure 1. The threshold current density reached 200A/cm² level at 1.3 μm region which is low enough to be used for practical applications. Therefore GaInNAs is thought to be a key material in photonic ICs in the long wavelength region. Semiconductor lasers and semiconductor optical amplifiers (SOAs) are key components of photonic ICs functioning as light sources, switches, amplifiers, wavelength converters and so on. In this paper, as the first study for photonic integration using GaInNAs, we present very low threshold current GaInNAs lasers and GaInNAs SOAs operating 1.3 μm region with good temperature characteristics.

Showing 5 of 7 publications

Conference Committee Involvement (11)

Quantum Sensing and Nano Electronics and Photonics XIX

29 January 2023 | San Francisco, California, United States

Quantum Sensing and Nano Electronics and Photonics XVIII

24 January 2022 | San Francisco, California, United States

Quantum Sensing and Nano Electronics and Photonics XVII

2 February 2020 | San Francisco, California, United States

Quantum Sensing and Nano Electronics and Photonics XVI

3 February 2019 | San Francisco, California, United States

Quantum Sensing and Nano Electronics and Photonics XV

28 January 2018 | San Francisco, California, United States

Showing 5 of 11 Conference Committees

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