Fumio Koyama

Akihiro Matsutani, Fumio Koyama, Ayako Suzuki, 2014, 2014 OptoElectronics and Communication Conference and Australian Conference on Optical Fibre Technology.

Long- and short-wavelength VCSELs

Kenichi Iga, Fumio Koyama, Tomoyuki Miyamoto, 2002, OPTO.

APPLICATION OF NUMERICAL FLUID ANALYSIS TO VOID FILLING INJECTION WITH USE OF HYDRAULIC PLASTIC GROUT

Fumio Koyama, Kazunori Ito, Masatoshi Kimura, 2010 .

Long-wavelength GaInAs/GaAs VCSELs and multiwavelength arrays

Fumio Koyama, Masakazu Arai, F. Koyama, 2004, SPIE Micro + Nano Materials, Devices, and Applications.

Output beam profile control of slow-light Bragg reflector waveguide deflector with high-contrast sub-wavelength grating

Fumio Koyama, Xiaodong Gu, 2014, Photonics West - Optoelectronic Materials and Devices.

Two-dimensional parallel optical interconnect module formation based on microoptical bench concept

Kenichi Iga, Fumio Koyama, Yuji Shimada, 2002 .

VCSELs: their 30 years history and new challenges

Fumio Koyama, 2008, SPIE/OSA/IEEE Asia Communications and Photonics.

In-plane integration of VCSEL with photo-detector by using laterally coupled cavities

Fumio Koyama, Hamed Dalir, 2014, Photonics West - Optoelectronic Materials and Devices.

Optical signal processing using a vertical-cavity surface-emitting laser with external optical injection

Fumio Koyama, Yutaka Onishi, 2003, SPIE OPTO.

Surface-emitting lasers for parallel data transmission and data storage

Kenichi Iga, Fumio Koyama, 1998, Other Conferences.

Watt-class high-power and high-beam-quality VCSEL amplifiers

Xiaodong Gu, Fumio Koyama, Yoshiyuki Suzuki, 2019, OPTO.

SYSTEMATIZATION OF THE CURRENT FORECAST MODEL IN THE RAILWAY BOSPHORUS TUBE CROSSING CONSTRUCTION

Yukinobu Oda, Fumio Koyama, Kazunori Ito, 2007 .

Low-threshold multiwavelength VCSEL arrays fabricated by nonplanar MOCVD

Kenichi Iga, Fumio Koyama, Yukio Hayashi, 1995, Photonics West.

Optical coupling for Bragg reflector slow light waveguide using micro-corner mirror

Fumio Koyama, Takayoshi Fujisawa, Ayumi Fuchida, 2009, OPTO.

Two-Dimensional Beam Steering Device Based on VCSEL Slow-Light Waveguide Array with Amplifier Function

Akihiro Matsutani, Fumio Koyama, Keisuke Kondo, 2019, 2019 Optical Fiber Communications Conference and Exhibition (OFC).

High-temperature operation of a 1.2-μm single-transverse-mode highly strained GaInAs/GaAs QW laser

Fumio Koyama, Tomoyuki Miyamoto, Shigeru Kanazawa, 2006, SPIE/OSA/IEEE Asia Communications and Photonics.

Solid-state VCSEL beam scanner with ultra-large field of view and high resolution

Fumio Koyama, Satoshi Shinada, Ruixiao Li, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

1060nm Single-mode Metal-aperture VCSEL Array with Transverse Resonance and Low Power Consumption below 50 fJ/bit

Fumio Koyama, Satoshi Shinada, Hameeda R. Ibrahim, 2021, 2021 European Conference on Optical Communication (ECOC).

Compact 1D/2D VCSEL Beam Scanner with Enhanced Field of View and High Resolution

Fumio Koyama, Satoshi Shinada, Ruixiao Li, 2021, 2021 European Conference on Optical Communication (ECOC).

Record High Power Single-mode Operation and Beam Steering of VCSEL-Integrated Amplifier/Beam Scanner

Fumio Koyama, Satoshi Shinada, Masanori Nakahama, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

1060nm single-mode metal aperture VCSEL array with transverse resonance for 5km single-mode fiber transmission

Fumio Koyama, Satoshi Shinada, Hameeda R. Ibrahim, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

Optical Nonlinear-Effect Compensator Based on Vertical-cavity Saturable Absorber

Fumio Koyama, Catherine Caneau, Nobuhiko Nishiyama, 2006, 2006 European Conference on Optical Communications.

High Temperature Characteristics of Nearly 1.2 µm GaInAs/GaAs/AlGaAs Lasers

Kenichi Iga, Fumio Koyama, Tomoyuki Miyamoto, 1999 .

Giant birefringence and tunable differential group delay in Bragg reflector based on tapered three-dimensional hollow waveguide

Fumio Koyama, F. Koyama, Mukesh Kumar, 2009 .

Plasmon Enhanced Optical Near-field Probing of Metal Nanoaperture Surface Emitting Laser.

Fumio Koyama, Jiro Hashizume, 2004, Optics express.

Vertical cavity surface-emitting laser with an AlGaAs/AlAs Bragg reflector

Kenichi Iga, Fumio Koyama, Takahiro Sakaguchi, 1988 .

Proposal of tunable hollow waveguide distributed Bragg reflectors

Fumio Koyama, Yasuki Sakurai, F. Koyama, 2004 .

Control of Group Delay and Chromatic Dispersion in Tunable Hollow Waveguide with Highly Reflective Mirrors

Fumio Koyama, Yasuki Sakurai, F. Koyama, 2004 .

Room temperature cw vertical cavity surface emitting laser and high power 2-D laser array

Kenichi Iga, Fumio Koyama, Susumu Kinoshita, 1989 .

Modeling of oxide-confined vertical-cavity surface-emitting lasers

Kenichi Iga, Fumio Koyama, H. Bissessur, 1997 .

High-Power CW Operation of GaInAsP/InP Superluminescent Light-Emitting Diode with Tapered Active Region

Kenichi Iga, Fumio Koyama, Shigeaki Sekiguchi, 2001 .

Two-dimensional multiwavelength surface emitting laser arrays fabricated by nonplanar MOCVD

Kenichi Iga, Fumio Koyama, Yusuke Hayashi, 1994 .

Multioxide layer vertical-cavity surface-emitting lasers with improved modulation bandwidth

Fumio Koyama, Takashi Kondo, Masakazu Arai, 2003, CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on Lasers and Electro-Optics (IEEE Cat. No.03TH8671).

Superlattice AlAs/AlInAs-oxide current aperture for long wavelength InP-based vertical-cavity surface-emitting laser structure

Kenichi Iga, Fumio Koyama, N. Ohnoki, 1998 .

Analysis and fabrication of microaperture GaAs-GaAlAs surface-emitting laser for near-field optical data storage

Kenichi Iga, Fumio Koyama, S. Shinada, 2001 .

Spectral linewidth of AlGaAs/GaAs surface-emitting laser

Kenichi Iga, Fumio Koyama, H. Tanobe, 1989 .

Measurement of Plasma Density for Control of Etching Profile in Inductively Coupled Plasma Etching of InP

Kenichi Iga, Akihiro Matsutani, Fumio Koyama, 2002 .

Observation of fast spontaneous emission decay in GaInAsP photonic crystal point defect nanocavity at room temperature

Kengo Nozaki, Fumio Koyama, Toshihiko Baba, 2004 .

Transverse mode control of vcsels using highly angular dependent high contrast sub-wavelength grating

Fumio Koyama, Akihiro Imamura, Jyunichi Kashino, 2011, 17th Microopics Conference (MOC).

A Novel Birefringent Distributed Bragg Reflector Using a Metal/Dielectric Polarizer for Polarization Control of Surface-Emitting Lasers

Kenichi Iga, Fumio Koyama, Toshihiko Baba, 1994 .

Ultra-high channel-count wavelength demultiplexer based on a Bragg reflector waveguide with large angular dispersion.

Akihiro Matsutani, Fumio Koyama, Toshikazu Shimada, 2012, Optics express.

Electron reflectance of multiquantum barrier (MQB)

Kenichi Iga, Fumio Koyama, Hiroyuki Uenohara, 1986 .

40 Gbps modulation of transverse coupled cavity VCSEL with push–pull modulation scheme

Fumio Koyama, Hamed Dalir, 2014 .

High-resolution wavelength demultiplexer based on a Bragg reflector waveguide amplifier with large angular dispersion

Akihiro Matsutani, Fumio Koyama, Toshikazu Shimada, 2012, 2012 38th European Conference and Exhibition on Optical Communications.

InGaAs/GaAs Vertical-Cavity Surface Emitting Laser on GaAs (311)B Substrate Using Carbon Auto-Doping

Kenichi Iga, Fumio Koyama, Nobuhiko Nishiyama, 1998 .

Design Consideration of GaN-Based Surface Emitting Lasers

Kenichi Iga, Fumio Koyama, T. Honda, 1996 .

Spontaneous emission factor of a microcavity DBR surface-emitting laser

Kenichi Iga, Fumio Koyama, Toshihiko Baba, 1991 .

High Power and High Beam Quality VCSEL Amplifier

Akihiro Matsutani, Fumio Koyama, Keisuke Kondo, 2018, 2018 IEEE International Semiconductor Laser Conference (ISLC).

Low threshold current density operation of GaInNAs quantum well lasers grown by metalorganic chemical vapour deposition

Kenichi Iga, Fumio Koyama, Takashi Kondo, 2000 .

High-speed compact electro-absorption modulator laterally integrated with VCSEL

Fumio Koyama, Yuta Takahashi, Hamed Dalir, 2014, 2014 The European Conference on Optical Communication (ECOC).

Multiple-wavelength GaInAs-GaAs vertical cavity surface emitting laser array with extended wavelength span

Akihiro Matsutani, Fumio Koyama, Tomoyuki Miyamoto, 2003 .

Fabrication of Micro-Aperture Surface Emitting Laser for Near Field Optical Data Storage

Kenichi Iga, Fumio Koyama, Kenya Goto, 1999 .

Slow-light total-internal-reflection switch with bending angle of 30 deg.

Akihiro Matsutani, Fumio Koyama, Ayumi Fuchida, 2011, Optics letters.

GaInNAs/GaAs quantum dots grown by chemical beam epitaxy

Kenichi Iga, Fumio Koyama, Tomoyuki Miyamoto, 2000 .

Active Distributed Reflector Lasers Phase Adjusted by Groove Region

Fumio Koyama, Yasuharu Suematsu, Sekartedjo Koentjoro, 1984 .

Noise suppression of spectrum‐sliced light using semiconductor optical amplifiers

Fumio Koyama, Takeshi Yamatoya, 2003 .

Beam steering in GaInAs/GaAs slow-light Bragg reflector waveguide amplifier

Akihiro Matsutani, Fumio Koyama, Toshikazu Shimada, 2011 .

Novel 2D high-contrast grating hollow-core waveguide

Fumio Koyama, Connie Chang-Hasnain, Bala Pesala, 2009, 2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference.

Highly angular dependent high-contrast grating mirror and its application for transverse-mode control of VCSELs

Akihiro Matsutani, Fumio Koyama, Shunya Inoue, 2014 .

Highly strained GaInAs-GaAs quantum-well vertical-cavity surface-emitting laser on GaAs (311)B substrate for stable polarization operation

Kenichi Iga, Fumio Koyama, S. Shinada, 2001 .

First room temperature CW operation of GaInAsP/InP surface emitting laser

Kenichi Iga, Fumio Koyama, Toshihiko Baba, 1993 .

Threshold Estimation of GaN-Based Surface Emitting Lasers Operating in Ultraviolet Spectral Region

Kenichi Iga, Fumio Koyama, Tohru Honda, 1995 .

Polarisation control for surface emitting lasers

Kenichi Iga, Fumio Koyama, T. Mukaihara, 1991 .

Unidirectional coupling of laterally coupled VCSEL and slow light modulator/amplifier

Akihiro Matsutani, Fumio Koyama, Shanting Hu, 2017, 2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR).

1.2 µm highly strained GaInAs/GaAs quantum well lasers for singlemode fibre datalink

Kenichi Iga, Akihiro Matsutani, Fumio Koyama, 1999 .

Fan-beam steering device using a photonic crystal slow-light waveguide with surface diffraction grating.

Hiroshi Abe, Fumio Koyama, Toshihiko Baba, 2017, Optics letters.

Micromachined GaAs/AlGaAs Resonant-Cavity Light Emitter with Small Temperature Dependence of Emission Wavelength

Akihiro Matsutani, Fumio Koyama, Masakazu Arai, 2003 .

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

Kenichi Iga, Fumio Koyama, Toshihiko Baba, 1996 .

Low Threshold Current Density Operation of 1.16 µm Highly Strained GaInAs/GaAs Vertical Cavity Surface Emitting Lasers on (100) GaAs Substrate

Akihiro Matsutani, Fumio Koyama, Tomoyuki Miyamoto, 2002 .

Growth of highly strained GaInAs-GaAs quantum wells on patterned substrate and its application for multiple-wavelength vertical-cavity surface-emitting laser array

Akihiro Matsutani, Fumio Koyama, Tomoyuki Miyamoto, 2002 .

Surface plasmon resonance on microaperture vertical-cavity surface-emitting laser with metal grating

Fumio Koyama, S. Shinada, Jiro Hashizume, 2003 .

Microfabrication of Dielectric Multilayer Reflector by Reactive Ion Etching and Characterization of Induced Wafer Damage

Kenichi Iga, Akihiro Matsutani, Fumio Koyama, 1991 .

1.2 µm Band GaInAs/GaAs High-Density Multiple-Wavelength Vertical Cavity Surface Emitting Laser Array

Akihiro Matsutani, Fumio Koyama, Tomoyuki Miyamoto, 2005 .

Modeling of low-threshold vertical cavity surface emitting lasers for optical interconnects

Kenichi Iga, Fumio Koyama, H. Bissessur, 1996, Digest IEEE/Leos 1996 Summer Topical Meeting. Advanced Applications of Lasers in Materials and Processing.

GaAlAs/GaAs micromachined thermally tunable vertical cavity filter with low tuning voltage

Fumio Koyama, Masakazu Arai, Takeru Amano, 2002 .

Lasing Characteristics of Low-Threshold GaInNAs Lasers Grown by Metalorganic Chemical Vapor Deposition

Kenichi Iga, Fumio Koyama, Takashi Kondo, 2001 .

Low temperature growth of GaInNAs/GaAs quantum wells by metalorganic chemical vapor deposition using tertiarybutylarsine

Kenichi Iga, Fumio Koyama, D. Schlenker, 1998 .

Slow Light Modulator with Bragg Reflector Waveguide

Fumio Koyama, Catherine Caneau, Nobuhiko Nishiyama, 2007, OFC 2007.

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

Fumio Koyama, Hamed Dalir, F. Koyama, 2013 .

Noise Suppression and Intensity Modulation in Gain-Saturated Semiconductor Optical Amplifiers and Its Application to Spectrum-Sliced Light Sources

Kenichi Iga, Fumio Koyama, Takeshi Yamatoya, 2000 .

Single-wavelength operation of 1.53 μm gainasp/inp buried-heterostructure integrated twin-guide laser with distributed bragg reflector under direct modulation up to 1 ghz

Fumio Koyama, Katsuyuki Utaka, Yasuharu Suematsu, 1981 .

A record low threshold InGaAs/GaAlAs vertical-cavity surface-emitting laser

Kenichi Iga, Akihiro Matsutani, Fumio Koyama, 1995 .

P-type delta-doped InGaAs/GaAs quantum well vertical-cavity surface-emitting lasers

Kenichi Iga, Fumio Koyama, Nobuhiko Nishiyama, 1999 .

Densely Integrated Multiple-Wavelength Vertical-Cavity Surface-Emitting Laser Array

Akihiro Matsutani, Fumio Koyama, Takashi Kondo, 2003 .

60-Channel wavelength selective switch on Bragg reflector waveguides array with 125 output-ports

Fumio Koyama, Hiromasa Tanobe, Xiaodong Gu, 2014, 2014 The European Conference on Optical Communication (ECOC).

Optical preamplifier using inverted signal of amplified spontaneous emission in saturated semiconductor optical amplifier

Fumio Koyama, T. Yamatoya, F. Koyama, 2001 .

Far field pattern control of single high order transverse mode VCSEL with micromachined surface relief

Fumio Koyama, S. Shinada, Nobuhiko Nishiyama, 2001, LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242).

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

Kenichi Iga, Fumio Koyama, Takeo Kageyama, 1999 .

Tunable Hollow Optical Waveguide and Its Applications

Fumio Koyama, Yasuki Sakurai, Toru Miura, 2010 .

Continuous wave operation of 1.26 [micro sign]m GaInNAs/GaAs vertical-cavity surface-emitting lasers grown by metalorganic chemical vapour deposition

Kenichi Iga, Akihiro Matsutani, Fumio Koyama, 2000 .

Classification of etching mechanism in reactive ion beam etch

Kenichi Iga, Fumio Koyama, Takashi Tadokoro, 1989 .

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

Kenichi Iga, Akihiro Matsutani, Fumio Koyama, 1995 .

1.5 μm phase adjusted active distributed reflector laser for complete dynamic single-mode operation

Fumio Koyama, Keisuke Kojima, Yasuharu Suematsu, 1984 .

Highly gain-saturated GaInAsP/InP SOA modulator for incoherent spectrum-sliced light source

Kenichi Iga, Fumio Koyama, Takeshi Yamatoya, 2000, Conference Proceedings. 2000 International Conference on Indium Phosphide and Related Materials (Cat. No.00CH37107).

High power superluminescent diodes for multi-wavelength light sources

Fumio Koyama, 1997, Conference Proceedings. LEOS '97. 10th Annual Meeting IEEE Lasers and Electro-Optics Society 1997 Annual Meeting.

Spontaneous emission factor of a microcavity DBR surface emitting laser. II. Effects of electron quantum confinements

Kenichi Iga, Fumio Koyama, Toshihiko Baba, 1992 .

Room-temperature CW operation of 1.60 μm GaInAsP/InP buried-heterostructure integrated laser with butt-jointed built-in distributed-Bragg-reflection waveguide

Fumio Koyama, T. Watanabe, Shigehisa Arai, 1982 .

GaAlAs/GaAs MOCVD Growth for Surface Emitting Laser

Kenichi Iga, Fumio Koyama, Hiroyuki Uenohara, 1987 .

Modeling and Fabrication of Hollow Optical Waveguide for Photonic Integrated Circuits

Akihiro Matsutani, Fumio Koyama, Toru Miura, 2002 .

Optical inverter using a vertical-cavity surface-emitting laser with external light injection

Fumio Koyama, Catherine Caneau, Nobuhiko Nishiyama, 2003, The 16th Annual Meeting of the IEEE Lasers and Electro-Optics Society, 2003. LEOS 2003..

Enhancing the modulation bandwidth of VCSELs to the millimeter-waveband using strong transverse slow-light feedback.

Fumio Koyama, Hamed Dalir, Moustafa Ahmed, 2015, Optics express.

Optical Quality Dependence on Growth Rate for Metalorganic Chemical Vapor Deposition Grown GaInNAs/GaAs

Kenichi Iga, Fumio Koyama, Tomoyuki Miyamoto, 2000 .

Spot Size Dependence of Filtering Characteristics in Dielectric Multilayer Filters for WDM Applications

Kenichi Iga, Fumio Koyama, Yasuhiko Aoki, 2001 .

Fabrication and characterization of hollow waveguide optical switch with variable air core.

Fumio Koyama, Chang-Hwan Bae, 2005, Optics express.

Plasmon-enhancement of optical near-field of metal nanoaperture surface-emitting laser

Fumio Koyama, Jiro Hashizume, F. Koyama, 2004 .

Intensity noise and polarization stability of GaAlAs-GaAs surface emitting lasers

Kenichi Iga, Fumio Koyama, F. Koyama, 1991 .

Interface control of GaN/AlGaN quantum well structures in MOVPE growth

Kenichi Iga, Fumio Koyama, Takahiro Sakaguchi, 1998 .

Isolator-free 10 Gbit/s singlemode fibre data transmission using 1.1 /spl mu/m GaInAs/GaAs vertical cavity surface emitting laser

Akihiro Matsutani, Fumio Koyama, Tomoyuki Miyamoto, 2004 .

Advances of VCSEL photonics

Fumio Koyama, 2011, 17th Microopics Conference (MOC).

GaInAsP/InP CBH Surface-Emitting Laser with a Dielectric Multilayer Reflector

Kenichi Iga, Fumio Koyama, Isao Watanabe, 1987 .

Low Threshold Room Temperature Pulsed and -31 °C CW Operations of 1.3 µm GaInAsP/InP Buried Heterostructure Surface Emitting Lasers

Kenichi Iga, Fumio Koyama, Toshihiko Baba, 1993 .

High Power GaInAsP/InP Strained Quantum Well Superluminescent Diode with Tapered Active Region

Kenichi Iga, Fumio Koyama, Takeshi Yamatoya, 1999 .

Lasing characteristics of InGaAs-GaAs polarization controlled vertical-cavity surface-emitting laser grown on GaAs [311] B substrate

Kenichi Iga, Fumio Koyama, Nobuhiko Nishiyama, 1999 .

850 nm transverse-coupled-cavity vertical-cavity surface-emitting laser with direct modulation bandwidth of over 30 GHz

Akihiro Matsutani, Fumio Koyama, Masanori Nakahama, 2015 .

Surface emitting semiconductor lasers

Kenichi Iga, Fumio Koyama, Susumu Kinoshita, 1988 .

Ultra-compact beam-steering device based on Bragg reflector waveguide amplifier with number of resolution points over 100

Akihiro Matsutani, Fumio Koyama, Toshikazu Shimada, 2012 .

Electro-Thermal Beam Steering Using Bragg Reflector Waveguide Amplifier

Akihiro Matsutani, Fumio Koyama, Toshikazu Shimada, 2012 .

Characterization of spot-size dependence of coarse wavelength division multiplexing dielectric multilayer thin-film filters for planner lightwave circuit platforms

Fumio Koyama, Satoshi Suda, F. Koyama, 2005 .

Theoretical and Experimental Estimations of Photon Recycling Effect in Light Emitting Devices with a Metal Mirror

Kenichi Iga, Fumio Koyama, Toshihiko Baba, 1996 .

Densely integrated multiple-wavelength vertical cavity surface emitting laser array

Akihiro Matsutani, Fumio Koyama, Takashi Kondo, 2002, The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society.

Compact wavelength selective switch based on high-density Bragg reflector waveguide array with 120 output ports

Fumio Koyama, Xiaodong Gu, 2014, OFC 2014.

Novel Implantation Method to Improve Machine-Model Electrostatic Discharge Robustness of Stacked N-Channel Metal-Oxide Semiconductors(NMOS) in Sub-Quarter-Micron Complementary Metal-Oxide Semiconductors(CMOS) Technology

Kenichi Iga, Fumio Koyama, Tomoyuki Miyamoto, 2001 .

Inclusion of Strain Effect in Miscibility Gap Calculations for III–V Semiconductors

Jochen Gemmer, Kenichi Iga, Fumio Koyama, 2000 .

Optical quality of GaNAs and GaInNAs and its dependence on RF cell condition in chemical beam epitaxy

Kenichi Iga, Fumio Koyama, Takeo Kageyama, 2000 .

Lasing Characteristics of 1.2 µm Highly Strained GaInAs/GaAs Quantum Well Lasers

Kenichi Iga, Fumio Koyama, Tomoyuki Miyamoto, 2001 .

Modulation bandwidth enhancement of VCSELs with lateral optical feedback of slow light

Fumio Koyama, Hamed Dalir, 2010, 22nd IEEE International Semiconductor Laser Conference.

Transient behaviour of nonlinear optical compensator based on vertical micro-cavity saturable absorber

Fumio Koyama, Catherine Caneau, Nobuhiko Nishiyama, 2007 .

Noise suppression and intensity modulation using gain-saturated semiconductor optical amplifier,

Kenichi Iga, Fumio Koyama, Takeshi Yamatoya, 2000 .

Monolithically integrated multi-wavelength VCSEL arrays using high-contrast gratings.

Fumio Koyama, Werner Hofmann, Bala Pesala, 2010, Optics express.

1.23 /spl mu/m long wavelength highly strained GaInAs/GaAs quantum well laser

Fumio Koyama, Tomoyuki Miyamoto, Takashi Kondo, 2002, The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society.

Compact Dot Projector based on Folded Path VCSEL Amplifier for Structured Light Sensing

Akihiro Matsutani, Fumio Koyama, Xiaodong Gu, 2019, 2019 Conference on Lasers and Electro-Optics (CLEO).

GaInAs/AlGaInAs Semiconductor Lasers on InP Substrate with AlAs Oxide Current Confinement

Kenichi Iga, Fumio Koyama, Nobuaki Hatori, 1996 .

GaInAsP Microcylinder (Microdisk) Injection Laser with AlInAs(Ox) Claddings

Masayuki Fujita, Kenichi Iga, Akihiro Matsutani, 2001 .

CBE grown 1.5 mu m GaInAsP-InP surface emitting lasers

Kenichi Iga, Fumio Koyama, Tomoyuki Miyamoto, 1992 .

P-type AlAs Growth on a GaAs (311)B Substrate Using Carbon Auto-Doping for Low Resistance GaAs/AlAs Distributed Bragg Reflectors.

Kenichi Iga, Fumio Koyama, Nobuhiko Nishiyama, 1997 .

All-Optical Regeneration Using Transverse Mode Switching in Long-Wavelength Vertical-Cavity Surface-Emitting Lasers

Fumio Koyama, Catherine Caneau, Nobuhiko Nishiyama, 2006 .

Hollow Optical Waveguide for Temperature-Insensitive Photonic Integrated Circuits

Kenichi Iga, Akihiro Matsutani, Fumio Koyama, 2001 .

Micromachined AlGaAs/GaAs vertical cavity filter with adjustable temperature dependence and wavelength trimming ability

Kenichi Iga, Akihiro Matsutani, Fumio Koyama, 2000 .

Spontaneous emission factor and lifetime of a microcavity distributed Bragg reflector surface-emitting laser with quantum-wire structure

Kenichi Iga, Fumio Koyama, Toshihiko Baba, 1991 .

AlGaAs/GaAs multiquantum-well (MQW) surface-emitting laser

Kenichi Iga, Fumio Koyama, Hiroyuki Uenohara, 1989 .

Novel optical preamplifier with inverted ASE signal of semiconductor optical amplifier

Kenichi Iga, Fumio Koyama, Takeshi Yamatoya, 2001, Proceedings 27th European Conference on Optical Communication (Cat. No.01TH8551).

Critical layer thickness of 1.2-μm highly strained GaInAs/GaAs quantum wells

Kenichi Iga, Fumio Koyama, Tomoyuki Miyamoto, 2000 .

C60 Resist Mask of Electron Beam Lithography for Chlorine-Based Reactive Ion Beam Etching

Kenichi Iga, Akihiro Matsutani, Fumio Koyama, 1998 .

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

Fumio Koyama, T. Tanbun-Ek, Yasuharu Suematsu, 1984 .

Compact Wavelength Selective Switch Using a Bragg Reflector Waveguide Array With Ultra-Large Number (>100) of Output Ports

Akihiro Matsutani, Fumio Koyama, Yuichiro Ikuma, 2015, Journal of Lightwave Technology.

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

Kenichi Iga, Fumio Koyama, Yusuke Hayashi, 1995 .

GaAs surface emitting lasers with circular buried heterostructure grown by metalorganic chemical vapor deposition and two‐dimensional laser array

Kenichi Iga, Fumio Koyama, Kazuhiko Tomomatsu, 1988 .

Micromachined Semiconductor Vertical Cavity for Temperature Insensitive Surface Emitting Lasers and Optical Filters

Kenichi Iga, Fumio Koyama, Nobuhiko Nishiyama, 2000 .

VCSEL-integrated Bragg reflector waveguide amplifier with single-mode output power over 10 mW

Akihiro Matsutani, Fumio Koyama, Masanori Nakahama, 2016, 2016 21st OptoElectronics and Communications Conference (OECC) held jointly with 2016 International Conference on Photonics in Switching (PS).

Topological characteristics of InAs quantum dot with GaInAs cover using Sb surfactant

Fumio Koyama, Tomoyuki Miyamoto, T. Matsuura, 2006 .

2×2 Multiwavelength Micromachined AlGaAs/GaAs Vertical Cavity Filter Array with Wavelength Control Layer

Kenichi Iga, Fumio Koyama, Nobuhiko Nishiyama, 2000 .

Growth and optical properties of highly strained GaInAs/GaAs quantum wells on (3 1 1)B GaAs by MOCVD

Kenichi Iga, Fumio Koyama, Tomoyuki Miyamoto, 2000 .

High-speed operation of bow-tie-shaped oxide aperture VCSELs with photon–photon resonance

Fumio Koyama, Hamed Dalir, F. Koyama, 2014 .

Reproducible fabrication of AlGaAs/GaAs circular buried heterostructure (CBH) surface-emitting lasers with low thresholds

Kenichi Iga, Fumio Koyama, Susumu Kinoshita, 1988 .

Giant and high-resolution beam steering using slow-light waveguide amplifier.

Fumio Koyama, Toshikazu Shimada, Xiaodong Gu, 2011, Optics express.