Kaoru HIGUMA


90 Gbaud NRZ-DP-DQPSK Modulation with Full-ETDM Technique Using High-Speed Optical IQ Modulator
Atsushi KANNO Takahide SAKAMOTO Akito CHIBA Masaaki SUDO Kaoru HIGUMA Junichiro ICHIKAWA Tetsuya KAWANISHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/07/01
Vol. E94-C  No. 7  pp. 1179-1186
Type of Manuscript:  Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
Ti:LiNbO3 optical modulatoroptical IQ modulatorquadrature phase shift keyingelectrically time-division multiplexing
 Summary | Full Text:PDF(1.7MB)

Programmable Coupler Ladder Based on Lithium Niobate Y-Junction Reflector
Jianxiao CHEN Tetsuya KAWANISHI Kaoru HIGUMA Satoshi SHINADA William S.C. CHANG Masayuki IZUTSU Paul K.L. YU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/03/01
Vol. E88-C  No. 3  pp. 379-384
Type of Manuscript:  Special Section PAPER (Special Section on Optical Signal-Processing Devices for Photonic Networks)
Category: 
Keyword: 
lithium niobatesplittercoupler ladderloop resonator
 Summary | Full Text:PDF(573.9KB)

A Novel Vector Spatial Field Mapping Technique Using Electro-Optic Sampling
Yoshiro MATSUO Tetsuya KAWANISHI Satoshi OIKAWA Kaoru HIGUMA Masayuki IZUTSU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/02/01
Vol. E87-C  No. 2  pp. 246-249
Type of Manuscript:  LETTER
Category: Lasers, Quantum Electronics
Keyword: 
field distributionspatial field mappingelectro-optic samplingsandwich-like electro-optic crystal
 Summary | Full Text:PDF(436.2KB)

Generation of 60 GHz Dual-Mode Optical BPSK Signal Pair for Crosstalk-Free QPSK Photodetection by Optical Modulation Scheme with Double RF Inputs and Suppressed Carrier Feature
Shinji NAKADAI Kaoru HIGUMA Satoshi OIKAWA Masato KISHI Masahiro TSUCHIYA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/07/01
Vol. E86-C  No. 7  pp. 1245-1250
Type of Manuscript:  Special Section PAPER (Special Issue on Recent Progress in Microwave and Millimeter-wave Photonics Technologies)
Category: Signal Generation and Processing Based on MWP Techniques
Keyword: 
RoF techniqueoptical millimeter-wave signal generationdual-mode optical signalQPSK modulation formatLN modulator
 Summary | Full Text:PDF(664.6KB)

Electro-Optic Sampling Measurement of the Electric Field Distribution on a Resonant Electrode for a Band-Operation Optical Modulator
Yoshiro MATSUO Tetsuya KAWANISHI Satoshi OIKAWA Kaoru HIGUMA Masayuki IZUTSU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/01/01
Vol. E86-C  No. 1  pp. 100-103
Type of Manuscript:  LETTER
Category: Microwaves, Millimeter-Waves
Keyword: 
electro-optic samplingelectric field distributionfrequency responseresonant stateasymmetric resonant electrode
 Summary | Full Text:PDF(363.1KB)

Design of LiNbO3 Optical Modulator with an Asymmetric Resonant Structure
Tetsuya KAWANISHI Satoshi OIKAWA Kaoru HIGUMA Masahide SASAKI Masayuki IZUTSU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/01/01
Vol. E85-C  No. 1  pp. 150-155
Type of Manuscript:  Special Section PAPER (Special Issue on Ultrafast Optical Signal Processing and Its Application)
Category: Optical Pulse Compression, Control and Monitoring
Keyword: 
optical modulatorresonanceasymmetric structurewaveguideimpedance matching
 Summary | Full Text:PDF(620.6KB)