Author

Makoto O. Okai

Observed names: M Okai, M. OKAI, M. Okai, Makoto Okai, Okai Makoto

Institution: Hitachi (Japan)

Observed institutions: BT Group (United Kingdom), BT Research, Kyoto University, Hitachi (Japan)

OpenAlex ID: A5109100711

GaInNAs: a novel material for long-wavelength semiconductor lasers

1997 · M. Kondow, T. Kitatani, et al. · IEEE Journal of Selected Topics in Quantum Electronics · 531

Room-Temperature Pulsed Operation of GaInNAs Laser Diodes with Excellent High-Temperature Performance

1996 · Masahiko Kondow, Shin'ichi Nakatsuka, et al. · Japanese Journal of Applied Physics · 172

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Structure of carbon nanotubes grown by microwave-plasma-enhanced chemical vapor deposition

2000 · M. Okai, T. Muneyoshi, et al. · Applied Physics Letters · 91

Analysis of Band Offset in GaNAs/GaAs by X-Ray Photoelectron Spectroscopy

1999 · Takeshi Kitatani, Masahiko Kondow, et al. · Japanese Journal of Applied Physics · 78

Corrugation-pitch modulated MQW-DFB lasers with narrow spectral linewidth

1991 · M. Okai, T. Tsuchiya, et al. · IEEE Journal of Quantum Electronics · 77

Spectral characteristics of distributed feedback semiconductor lasers and their improvements by corrugation-pitch-modulated structure

1994 · Makoto Okai · Journal of Applied Physics · 76

Room-temperature continuous-wave operation of GaInNAs/GaAslaser diode

1996 · M. Kondow, S. Natatsuka, et al. · Electronics Letters · 67

Strained multiquantum-well corrugation-pitch-modulated distributed feedback laser with ultranarrow (3.6 kHz) spectral linewidth

1993 · M. Okai, M. Suzuki, et al. · Electronics Letters · 67

Corrugation-pitch-modulated MQW-DFB laser with narrow spectral linewidth (170 kHz)

1990 · M. Okai, T. Tsuchiya, et al. · IEEE Photonics Technology Letters · 62

Beads-Milling of Waste Si Sawdust into High-Performance Nanoflakes for Lithium-Ion Batteries

2017 · Takatoshi Kasukabe, Hirotomo Nishihara, et al. · Scientific Reports · 58

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Corrugation-pitch-modulated phase-shifted DFB laser

1989 · M. Okai, N. Chinone, et al. · IEEE Photonics Technology Letters · 50

Novel method to fabricate corrugation for a λ/4-shifted distributed feedback laser using a grating photomask

1989 · M. Okai, S. Tsuji, et al. · Applied Physics Letters · 50

Room temperature continuous-wave photopumped operationof 1.22 µm GaInNAs/GaAs single quantum well vertical-cavity surface-emittinglaser

1997 · M.C. Larson, M. Kondow, et al. · Electronics Letters · 40

Photopumped lasing at 1.25 μm of GaInNAs-GaAs multiple-quantum-well vertical-cavity surface-emitting lasers

1997 · M.C. Larson, M. Kondow, et al. · IEEE Photonics Technology Letters · 39

Room-temperature lasing operation of GaInNAs-GaAs single-quantum-well laser diodes

1997 · T. Kitatani, M. Kondow, et al. · IEEE Journal of Selected Topics in Quantum Electronics · 38

Factors limiting the spectral linewidth of CPM-MQW-DFB lasers

1992 · M. Okai, T. Tsuchiya, et al. · IEEE Photonics Technology Letters · 33

Spectral linewidth reduction by low spatial hole burning in 1.5 μm multi-quantum-well λ/4-shifted DFB lasers

1990 · K. Uomi, S. Sasaki, et al. · Electronics Letters · 31

Quantum size effect on longitudinal spatial hole burning in MQW lambda /4-shifted DFB lasers

1991 · M. Aoki, K. Uomi, et al. · IEEE Journal of Quantum Electronics · 30

Characterization of the Refractive Index of Strained GaInNAs Layers by Spectroscopic Ellipsometry

1998 · Takeshi Kitatani, Masahiko Kondow, et al. · Japanese Journal of Applied Physics · 27

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Tunable DFB lasers with ultra-narrow spectral linewidth

1993 · M. Okai, T. Tsuchiya · Electronics Letters · 26

A Photochemical Storage Battery with an n-GaP Photoelectrode

1983 · Yoshiro Yonezawa, Makoto Okai, et al. · Bulletin of the Chemical Society of Japan · 26

Stability of the longitudinal mode in lambda /4-shifted InGaAsP/InP DFB lasers

1989 · M. Okai, S. Tsuji, et al. · IEEE Journal of Quantum Electronics · 25

Nitrogen incorporation rate, optimal growth temperature, and AsH3-flow rate in GaInNAs growth by gas-source MBE using N-radicals as an N-source

1999 · T Kitatani, M Kondow, et al. · Journal of Crystal Growth · 23

Complex-coupled λ/4-shifted DFB lasers with a flat FM response

1995 · M. Okai, M. Suzuki, et al. · IEEE Journal of Selected Topics in Quantum Electronics · 18

In-line Fabry-Perot optical waveguide filterwith quasi-chirped gratings

1996 · M. Okai, I.F. Lealman, et al. · Electronics Letters · 16

Works count: 78

Citation count: 1,899

H-index: 23

I10-index: 30