Takeshi SEKI


Real-Time Experiment and Numerical Analysis of Highly-Survivable Adaptive Restoration for High-Capacity Optical Signal Transmission
Hiroki KAWAHARA Kohei SAITO Masahiro NAKAGAWA Takashi KUBO Takeshi SEKI Takeshi KAWASAKI Hideki MAEDA 
Publication:   
Publication Date: 2021/04/01
Vol. E104-B  No. 4  pp. 360-369
Type of Manuscript:  PAPER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
high-order QAM modulationrate-adaptive transponderCD-/CDC-ROADMadaptive restoration
 Summary | Full Text:PDF

Dual-Carrier 1-Tb/s Transmission Over Field-Deployed G.654.E Fiber Link Using Real-Time Transponder
Fukutaro HAMAOKA Takeo SASAI Kohei SAITO Takayuki KOBAYASHI Asuka MATSUSHITA Masanori NAKAMURA Hiroki TANIGUCHI Shoichiro KUWAHARA Hiroki KAWAHARA Takeshi SEKI Josuke OZAKI Yoshihiro OGISO Hideki MAEDA Yoshiaki KISAKA Masahito TOMIZAWA 
Publication:   
Publication Date: 2020/11/01
Vol. E103-B  No. 11  pp. 1183-1189
Type of Manuscript:  INVITED PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
optical fiber communicationdigital coherent transmissionreal-time transmissionfield transmission
 Summary | Full Text:PDF

Investigation of Wavelength Switching Performance of a SSG-DBR-LD for Optical Packet Switch Application
Hiroyuki UENOHARA Takeshi SEKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/03/01
Vol. E88-C  No. 3  pp. 303-308
Type of Manuscript:  Special Section PAPER (Special Section on Optical Signal-Processing Devices for Photonic Networks)
Category: 
Keyword: 
wavelength switchingwavelength tunable laseroptical packet switch
 Summary | Full Text:PDF

12 GHz Low-Noise MMIC Amplifier with GaAs Pulse-Doped MESFET's
Nobuo SHIGA Shigeru NAKAJIMA Nobuhiro KUWATA Kenji OTOBE Takeshi SEKIGUCHI Ken-ichiro MATSUZAKI Hideki HAYASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1994/09/25
Vol. E77-C  No. 9  pp. 1500-1506
Type of Manuscript:  PAPER
Category: Microwave and Millimeter Wave Technology
Keyword: 
MMIClow-noiseamplifierGaAs MESFET
 Summary | Full Text:PDF