Naokatsu YAMAMOTO

Mach-Zehnder Optical Modulator Integrated with Tunable Multimode Interference Coupler of Ti:LiNbO3 Waveguides for Controlling Modulation Extinction Ratio
Anna HIRAI Yuichi MATSUMOTO Takanori SATO Tadashi KAWAI Akira ENOKIHARA Shinya NAKAJIMA Atsushi KANNO Naokatsu YAMAMOTO 
Publication:   
Publication Date: 2022/08/01
Vol. E105-C  No. 8  pp. 385-388
Type of Manuscript:  BRIEF PAPER
Category: Lasers, Quantum Electronics
Keyword: 
multimode interference (MMI), optical modulator, optical coupler, titanium diffused LiNbO3, tuning, extinction ratio, optical single-sideband (SSB) modulation, 
 Summary | Full Text:PDF(1.6MB)
Electro-Optic Modulator for Compensation of Third-Order Intermodulation Distortion Using Frequency Chirp Modulation
Daichi FURUBAYASHI Yuta KASHIWAGI Takanori SATO Tadashi KAWAI Akira ENOKIHARA Naokatsu YAMAMOTO Tetsuya KAWANISHI 
Publication:   
Publication Date: 2020/11/01
Vol. E103-C  No. 11  pp. 653-660
Type of Manuscript:  Special Section PAPER (Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
electro-optic modulator, third-order intermodulation distortion, dual parallel Mach-Zehnder modulator, frequency chirp, rat race circuit, 
 Summary | Full Text:PDF(2.4MB)
A 1.55-µm Waveband Optical Absorption Characterization of an Electro-Absorption Device with a Highly Stacked InAs/InGaAlAs Quantum Dot Structure
Naokatsu YAMAMOTO Kouichi AKAHANE Toshimasa UMEZAWA Tetsuya KAWANISHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/08/01
Vol. E98-C  No. 8  pp. 878-881
Type of Manuscript:  BRIEF PAPER
Category: MWP Device and Application
Keyword: 
quantum dot, electro-absorption, optical modulator, quantum confined stark effect, waveguide device, 
 Summary | Full Text:PDF(774.7KB)
10-GHz High-Repetition Optical Short Pulse Generation from Wavelength-Tunable Quantum Dot Optical Frequency Comb Laser
Naokatsu YAMAMOTO Kouichi AKAHANE Tetsuya KAWANISHI Hideyuki SOTOBAYASHI Yuki YOSHIOKA Hiroshi TAKAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/02/01
Vol. E96-C  No. 2  pp. 187-191
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Photonics Technology)
Category: 
Keyword: 
Quantum dot laser, Optical frequency comb, Mode locking technique, Optical pulse generation, and Wavelength-tunable laser, 
 Summary | Full Text:PDF(2MB)
Novel Functionality and Material for Si-Photonics: Two-Photon Absorption Switching and Antimonide Hetero-Genius Epitaxy
Tak-Keung LIANG Kouichi AKAHANE Naokatsu YAMAMOTO Luis Romeu NUNES Tetsuya KAWANISHI Masahiro TSUCHIYA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/02/01
Vol. E90-C  No. 2  pp. 409-414
Type of Manuscript:  INVITED PAPER (Special Section on Evolution of Microwave and Millimeter-Wave Photonics Technology)
Category: 
Keyword: 
silicon photonics, two-photon absorption, optical switch, photonic devices, heteroepitaxy, gallium antimonide, 
 Summary | Full Text:PDF(416.1KB)