Hiroto KAWAKAMI


Optical DP-High Order-QAM Transmission System for High-Speed Short Links Utilizing Copropagating Twin Local Lights
Hiroto KAWAKAMI Takayuki KOBAYASHI Yutaka MIYAMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/08/01
Vol. E99-B  No. 8  pp. 1799-1804
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Information and Communication Technologies and Services in Conjunction with Main Topics of APCC2015)
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
QAMdigital coherent detectionphase noiselinewidth
 Summary | Full Text:PDF

Suppression of the Cross-Gain Modulation in Remotely-Pumped EDF/DRA Hybrid Inline Amplifier Systems with Online OTDR for Gain Monitoring
Hiroto KAWAKAMI Hiroji MASUDA Kenji SATO Yutaka MIYAMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/05/01
Vol. E88-B  No. 5  pp. 1986-1993
Type of Manuscript:  Special Section PAPER (Joint Special Section on Recent Progress in Optoelectronics and Communications)
Category: Transmission Systems and Technologies
Keyword: 
OTDRremote pumpingdistributed Raman amplifiercross gain modulation
 Summary | Full Text:PDF

All-Optical Timing Clock Extraction Using Multiple Wavelength Pumped Brillouin Amplifier
Hiroto KAWAKAMI Yutaka MIYAMOTO Tomoyoshi KATAOKA Kazuo HAGIMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/05/25
Vol. E78-B  No. 5  pp. 694-701
Type of Manuscript:  Special Section PAPER (Special Issue on Optical Signal Processing and Its Applications to Telecommunications)
Category: 
Keyword: 
Brillouin amplifieroptical timing extraction quality factorfree spectrum rangeoptical resonator
 Summary | Full Text:PDF