60-Channel wavelength selective switch on Bragg reflector waveguides array with 125 output-ports. - Xiaodong Gu 003; Kazunori Seno; Hiromasa Tanobe; Fumio Koyama (ECOC, 2014)

Compact wavelength selective switch based on high-density Bragg reflector waveguide array with 120 output ports. - Xiaodong Gu 003; Fumio Koyama (OFC, 2014)

Over 30 GHz modulation of 850 nm transverse coupled cavity vertical-cavity surface-emitting laser. - Xiaodong Gu 003; Masanori Nakahama; Akihiro Matsutani; Fumio Koyama (ECOC, 2015)

Active Bragg Reflector Waveguide Demultiplexer Array with Over 100 Wavelength Channels and Optical Gain for Large Port-count WSS. - Xiaodong Gu 003; Masanori Nakahama; Fumio Koyama (OFC, 2018)

Two-Dimensional Beam Steering Device Based on VCSEL Slow-Light Waveguide Array with Amplifier Function. - Keisuke Kondo; Xiaodong Gu 003; Zeuku Ho; Akihiro Matsutani; Fumio Koyama (OFC, 2019)

Full C-Band Wavelength Demultiplexer with Optical Gain for Use in Wavelength Selective Switch. - Ryosuke Togashi; Xiaodong Gu 003; Takahiro Sakaguchi; Fumio Koyama (OFC, 2019)

Enhanced-Field-of-View Solid-State VCSEL Beam Scanner with Lateral Resolution Points of More than 1200. - Ruixiao Li; Zeuku Ho; Xiaodong Gu 003; Fumio Koyama (ECOC, 2020)

Real-Time Structured-Light Depth Sensing Based on Ultra-Compact, Non-Mechanical VCSEL Beam Scanner. - Ruixiao Li; Masashi Takanohashi; Shanting Hu; Xiaodong Gu 003; Fumio Koyama (OFC, 2020)

Lateral integration of VCSEL and amplifier with resonant wavelength detuning design. - Shanting Hu; Masashi Takanohashi; Xiaodong Gu 003; Akihiro Matsutani; Fumio Koyama (IEICE Electron. Express, 2020)

Compact 1D/2D VCSEL Beam Scanner with Enhanced Field of View and High Resolution. - Ruixiao Li; Xiaodong Gu 003; Satoshi Shinada; Fumio Koyama (ECOC, 2021)

Record High Power Single-mode Operation and Beam Steering of VCSEL-Integrated Amplifier/Beam Scanner. - Shanting Hu; Xiaodong Gu 003; Ahmed M. A. Hassan; Masanori Nakahama; Satoshi Shinada; Fumio Koyama (OFC, 2021)

Solid-state VCSEL beam scanner with ultra-large field of view and high resolution. - Ruixiao Li; Zeuku Ho; Xiaodong Gu 003; Satoshi Shinada; Fumio Koyama (OFC, 2021)

Surface grating loaded VCSEL with single mode power of over 80 mW. - Shanting Hu; Ahmed Hassan; Xiaodong Gu 003; Masanori Nakahama; Fumio Koyama (IEICE Electron. Express, 2021)

Static and dynamic characteristics of double transverse coupled cavity VCSELs for high speed modulations. - Hameeda R. Ibrahim; Ahmed M. A. Hassan; Xiaodong Gu 003; Moustafa Ahmed; Fumio Koyama (IEICE Electron. Express, 2021)

1060nm Single-mode Transverse Coupled Cavity VCSEL with Surface Relief Engineering for 80Gbps PAM4 Modulation. - Shanting Hu; Xiaodong Gu 003; Hameeda R. Ibrahim; Masanori Nakahama; Satoshi Shinada; Fumio Koyama (OFC, 2022)

16-ch 1060-nm Single-mode Bottom-emitting Metal-aperture VCSEL Array for Co-packaged Optics. - Liang Dong; Xiaodong Gu 003; Fumio Koyama (OFC, 2023)

Full 3-inch Wafer Processed 1060 nm Single-mode Transverse Coupled-cavity VCSEL for Data Transmission in Standard 1300nm Single-mode Fiber. - Chang Ge 006; Boxuan Zhang; Xiaodong Gu 003; Susumu Kinoshita; Fumio Koyama (OFC, 2023)

High Bandwidth (>35GHz) 1060nm Single-mode Transverse Coupled-cavity VCSEL Array for Single-mode Fiber Transmission. - Hameeda R. Ibrahim; Chang Ge 006; Xiaodong Gu 003; Babu D. Padullaparthi; Fumio Koyama (OFC, 2024)

Enhanced high-frequency modulation of single-mode 850nm VCSELs via dual transverse-cavity integration. - Hameeda R. Ibrahim; Ahmed M. A. Hassan; Xiaodong Gu 003; Moustafa Ahmed; Fumio Koyama (IEICE Electron. Express, 2024)

DSP-free 500-meter Single-mode Fiber Transmission with Record High Bandwidth 1060nm Intra-cavity Metal-aperture Coupled-cavity VCSEL. - Hameeda R. Ibrahim; Ahmed Hassan; Chang Ge 006; Xiaodong Gu 003; Fumio Koyama (OFC, 2025)