Akio TAJIMA


First Demonstration of Mode Selective Active Multimode Interferometer Laser Diode
Bingzhou HONG Takuya KITANO Haisong JIANG Akio TAJIMA Kiichi HAMAMOTO 
Publication:   
Publication Date: 2017/10/01
Vol. E100-C  No. 10  pp. 775-781
Type of Manuscript:  Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
mode selective laser diodeActive multimode interferometerlater mode interferencemode division multiplex
 Summary | Full Text:PDF(1.6MB)

A Proposal of Cyclic Sleep Control Technique for Backup Resources in ROADM Systems to Reduce Power Consumption of Photonic Network
Tomoyuki HINO Hitoshi TAKESHITA Kiyo ISHII Junya KURUMIDA Shu NAMIKI Shigeru NAKAMURA Akio TAJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/12/01
Vol. E97-B  No. 12  pp. 2698-2705
Type of Manuscript:  PAPER
Category: Network System
Keyword: 
power-savingcyclic sleepdynamic controlC/D/C-ROADMtransponder aggregatorself-checkpath check
 Summary | Full Text:PDF(2.9MB)

Split pump region in 1.55 μm InGaAsP/InGaAsP asymmetric active multi-mode interferometer laser diode for improved modulation bandwidth
Mohammad NASIR UDDIN Takaaki KIZU Yasuhiro HINOKUMA Kazuhiro TANABE Akio TAJIMA Kazutoshi KATO Kiichi HAMAMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/07/01
Vol. E97-C  No. 7  pp. 781-786
Type of Manuscript:  Special Section PAPER (Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
Active multimode interferometer laser diodeModulation frequency enhancementSplit pumping sectionSemiconductor laser diodeMultiple quantum well (MQW) laser diode
 Summary | Full Text:PDF(3.8MB)

Prototype Highly Integrated 848 Transponder Aggregator Based on Si Photonics for Multi-Degree Colorless, Directionless, Contentionless Reconfigurable Optical Add/Drop Multiplexer
Hitoshi TAKESHITA Tomoyuki HINO Kiyo ISHII Junya KURUMIDA Shu NAMIKI Shigeru NAKAMURA Shigeki TAKAHASHI Akio TAJIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/07/01
Vol. E96-C  No. 7  pp. 966-973
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Integrated Photonic Devices)
Category: 
Keyword: 
multi-degreeCDC-ROADMtransponder aggregatorSi photonics
 Summary | Full Text:PDF(7.3MB)

Next Generation Optical Access Network: Standardization Outline and Key Technologies for Co-existence with Legacy Systems
Akio TAJIMA Hiroki YANAGISAWA Seigo TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/07/01
Vol. E93-C  No. 7  pp. 1146-1151
Type of Manuscript:  INVITED PAPER (Special Section on Photonic Technologies for Access Networks)
Category: 
Keyword: 
FTTHNG-PON10G-EPONXG-PON
 Summary | Full Text:PDF(1.5MB)

High Speed Quantum Key Distribution System
Akio TAJIMA Akihiro TANAKA Seigo TAKAHASHI Ken-ichiro YOSHINO Yoshihiro NAMBU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/05/01
Vol. E93-A  No. 5  pp. 889-896
Type of Manuscript:  INVITED PAPER (Special Section on Leading-Edge Developments in Quantum Cryptographic Systems)
Category: 
Keyword: 
quantum key distributionplanar lightwave circuitsingle photon detectorWDM
 Summary | Full Text:PDF(2.8MB)

Photonic Core Node Based on a 2.56-Terabit/s Opto-Electronic Switching Fabric
Soichiro ARAKI Naoya HENMI Yoshiharu MAENO Kazuhiko MATSUDA Osamu NAKAKUBO Masayuki SHINOHARA Yoshihiko SUEMURA Akio TAJIMA Hiroaki TAKAHASHI Seigo TAKAHASHI Hiromi KOGANEMARU Ken-ichi SAISHO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/05/01
Vol. E84-C  No. 5  pp. 485-492
Type of Manuscript:  INVITED PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Communication Networks
Keyword: 
optical packet switchWDMATMIPscheduler
 Summary | Full Text:PDF(1.5MB)

Photonic Core Node Based on a 2.56-Terabit/s Opto-Electronic Switching Fabric
Soichiro ARAKI Naoya HENMI Yoshiharu MAENO Kazuhiko MATSUDA Osamu NAKAKUBO Masayuki SHINOHARA Yoshihiko SUEMURA Akio TAJIMA Hiroaki TAKAHASHI Seigo TAKAHASHI Hiromi KOGANEMARU Ken-ichi SAISHO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/05/01
Vol. E84-B  No. 5  pp. 1111-1118
Type of Manuscript:  INVITED PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Communication Networks
Keyword: 
optical packet switchWDMATMIPscheduler
 Summary | Full Text:PDF(1.4MB)

A 10-Gb/s Optical Asynchronous Packet Receiver with a Fast Bit-Synchronization Circuit
Akio TAJIMA Hiroaki TAKAHASHI Yoshiharu MAENO Soichiro ARAKI Naoya HENMI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/08/25
Vol. E82-B  No. 8  pp. 1121-1126
Type of Manuscript:  Special Section PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Communication Networks
Keyword: 
optical packet switchbit synchronizationasynchronous packet receiver
 Summary | Full Text:PDF(1.2MB)

A 10-Gb/s Optical Asynchronous Packet Receiver with a Fast Bit-Synchronization Circuit
Akio TAJIMA Hiroaki TAKAHASHI Yoshiharu MAENO Soichiro ARAKI Naoya HENMI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/08/25
Vol. E82-C  No. 8  pp. 1387-1392
Type of Manuscript:  Special Section PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Communication Networks
Keyword: 
optical packet switchbit synchronizationasynchronous packet receiver
 Summary | Full Text:PDF(1.2MB)