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Electronics and Electrical Engineering

D-Index
60
Citations
14856
World Ranking
1621
National Ranking
55

Research.com Recognitions

  • 2020 - OSA Fellows Fumio Koyama Tokyo Institute of Technology, Japan For seminal contributions to VCSEL photonics and integration

Overview

Fumio Koyama is affiliated with the Tokyo Institute of Technology in Japan. Their primary research contributions lie within the field of Engineering, with a focus on Electrical and Electronic Engineering. The scientist's work spans several subfields including Atomic and Molecular Physics, and Optics, Surfaces, Coatings and Films, Instrumentation, and Biomedical Engineering.

Their research covers multiple topics predominantly related to photonics and semiconductor technology. Major areas of focus include Photonic and Optical Devices, Semiconductor Lasers and Optical Devices, Optical Network Technologies, Semiconductor Quantum Structures and Devices, Optical Coatings and Gratings, Advanced Optical Sensing Technologies, and Optical Coherence Tomography Applications.

Recent publications by Fumio Koyama include:

  • Directly modulated membrane lasers with 108 GHz bandwidth on a high-thermal-conductivity silicon carbide substrate, 2020, Nature Photonics
  • >100-GHz Bandwidth Directly-Modulated Lasers and Adaptive Entropy Loading for Energy-Efficient >300-Gbps/λ IM/DD Systems, 2020, Journal of Lightwave Technology
  • 1060-nm single-mode transverse coupled cavity VCSEL with intra-cavity surface relief for 58-Gbps modulation and 5-km single-mode fiber transmission, 2022, Applied Physics Letters
  • High-power operations of single-mode surface grating long oxide aperture VCSELs, 2021, Applied Physics Letters
  • High power surface grating slow-light VCSEL, 2021, Applied Physics Express

Frequent co-authors associated with Fumio Koyama's work include Xiaodong Gu, Shanting Hu, Ahmed M. Hassan, Masanori Nakahama, and Satoshi Shinada.

The scientist has published extensively in several venues, with notable frequent publication venues being the Conference on Lasers and Electro-Optics, Applied Physics Express, IEICE Electronics Express, Journal of Lightwave Technology, and Japanese Journal of Applied Physics.

Among the recognitions received, Fumio Koyama was named an OSA Fellow in 2020 with the citation highlighting seminal contributions to VCSEL photonics and integration.

Best Publications

  • Surface emitting semiconductor lasers

    K. Iga;F. Koyama;S. Kinoshita

  • Frequency chirping in external modulators

    F. Koyama;K. Iga

  • Recent Advances of VCSEL Photonics

    F. Koyama

  • Room-temperature continuous wave lasing characteristics of a GaAs vertical cavity surface-emitting laser

    Fumio Koyama;Susumu Kinoshita;Kenichi Iga

  • Spontaneous emission factor of a microcavity DBR surface-emitting laser

    T. Baba;T. Hamano;F. Koyama;K. Iga

  • Electron reflectance of multiquantum barrier (MQB)

    K. Iga;H. Uenohara;F. Koyama

  • Record low-threshold index-guided InGaAs/GaAlAs vertical-cavity surface-emitting laser with a native oxide confinement structure

    Y. Hayashi;T. Mukaihara;N. Hatori;N. Ohnoki

  • 1.5 μm phase-shifted DFB lasers for single-mode operation

    K. Sekartedjo;N. Eda;K. Furuya;Y. Suematsu

  • Directly modulated membrane lasers with 108 GHz bandwidth on a high-thermal-conductivity silicon carbide substrate

    Suguru Yamaoka;Nikolaos Panteleimon Diamantopoulos;Hidetaka Nishi;Ryo Nakao

  • Microcavity GalaAs/GaAs surface-emitting laser with Ith = 6 mA

    K. Iga;S. Kinoshita;F. Koyama

  • 1.5-1.6 µm GaInAsP/InP dynamic-single-mode (DSM) lasers with distributed Bragg reflector

    F. Koyama;Y. Suematsu;S. Arai;T. Tawee

  • 29 GHz directly modulated 980 nm vertical-cavity surface emitting lasers with bow-tie shape transverse coupled cavity

    Hamed Dalir;Fumio Koyama

  • Room temperature cw operation of GaAs vertical cavity surface emitting laser

    Fumio Koyama;Susumu Kinoshita;Kenichi Iga

  • Near room temperature continuous wave lasing characteristics of GaInAsP/InP surface emitting laser

    T. Baba;Y. Yogo;K. Suzuki;F. Koyama

  • Analysis of dynamic spectral width of dynamic-single-mode (DSM) lasers and related transmission bandwidth of single-mode fibers

    F. Koyama;Y. Suematsu

  • Image display device and image display method

    Tatsuhiko Nobori;Fumio Koyama

  • Polarization control of vertical-cavity surface emitting lasers using a birefringent metal/dielectric polarizer loaded on top distributed Bragg reflector

    T. Mukaihara;N. Ohnoki;Y. Hayashi;N. Hatori

  • Thermal Annealing of GaInNAs/GaAs Quantum Wells Grown by Chemical Beam Epitaxy and Its Effect on Photoluminescence

    Takeo Kageyama;Tomoyuki Miyamoto;Shigeki Makino;Fumio Koyama

  • A Novel Short-Cavity Laser with Deep-Grating Distributed Bragg Reflectors

    Toshihiko Baba;Motoshi Hamasaki;Nobuaki Watanabe;Pasu Kaewplung Akihiro Matsutani

  • Growth of highly strained GaInAs/GaAs quantum wells for 1.2 μm wavelength lasers

    D Schlenker;T Miyamoto;Z Chen;F Koyama

  • Recent advances in VCSEL photonics

    Fumio Koyama

Frequent Co-Authors

Kenichi Iga
Kenichi Iga Tokyo Institute of Technology
Toshihiko Baba
Toshihiko Baba Yokohama National University
Yasuharu Suematsu
Yasuharu Suematsu Tokyo Institute of Technology
Connie J. Chang-Hasnain
Connie J. Chang-Hasnain University of California, Berkeley
Shigehisa Arai
Shigehisa Arai Tokyo Institute of Technology
C. Caneau
C. Caneau Corning (United States)
Andrei Faraon
Andrei Faraon California Institute of Technology
Alan E. Willner
Alan E. Willner University of Southern California
Satoshi Wada
Satoshi Wada University of Yamanashi
Masashi Yoshimura
Masashi Yoshimura Osaka University

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