Koji IGARASHI

Analysis of Signal Distribution in ASE-Limited Optical On-Off Keying Direct-Detection Systems
Hiroki KAWAHARA Kyo INOUE Koji IGARASHI 
Publication:   
Publication Date: 2021/11/01
Vol. E104-B  No. 11  pp. 1386-1394
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
on-off keying signal, probability density function, amplified spontaneous emission, 
 Summary | Full Text:PDF(1.7MB)
Reduction of Crosstalk Influence in a 7-Core Multicore Fiber by Frequency Interleave
Shun ORII Kyo INOUE Koji IGARASHI 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1590-1594
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
multicore fiber transmission, WDM, crosstalk, frequency interleave, hexagonal close-packed multicore fiber, 
 Summary | Full Text:PDF(942.9KB)
EXIT Chart-Aided Design of LDPC Codes for Self-Coherent Detection with Turbo Equalizer for Optical Fiber Short-Reach Transmissions
Noboru OSAWA Shinsuke IBI Koji IGARASHI Seiichi SAMPEI 
Publication:   
Publication Date: 2019/07/01
Vol. E102-B  No. 7  pp. 1301-1312
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
self-coherent detection, turbo equalizer, LDPC, EXIT chart, optical fiber short-reach transmissions, 
 Summary | Full Text:PDF(1.9MB)
Generation Efficiency of Fiber Four-Wave Mixing for Phase-Shift Keying Signal Light
Kyo INOUE Koji IGARASHI 
Publication:   
Publication Date: 2019/05/01
Vol. E102-B  No. 5  pp. 1005-1009
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
four-wave mixing, optical fiber, phase-shift keying signal, group velocity, walk-off, 
 Summary | Full Text:PDF(806.2KB)
Bit-Error-Rate Degradation Due to Inter-Channel Crosstalk of Different Signal Format
Naruki SHINOHARA Koji IGARASHI Kyo INOUE 
Publication:   
Publication Date: 2019/05/01
Vol. E102-B  No. 5  pp. 1000-1004
Type of Manuscript:  PAPER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
inter-channel crosstalk, bit error rate, modulation format, probability density distribution, 
 Summary | Full Text:PDF(1.3MB)
Simplified Iterative Decoder for Polybinary-Shaped Optical Signals in Super-Nyquist Wavelength Division Multiplexed Systems
Shuai YUAN Koji IGARASHI 
Publication:   
Publication Date: 2019/04/01
Vol. E102-B  No. 4  pp. 818-823
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
wavelength division multiplexing, forward error correction, maximum likelihood decoder, 
 Summary | Full Text:PDF(1.7MB)
Sub-100 fs Higher Order Soliton Compression in Dispersion-Flattened Fibers
Masahiro TSUCHIYA Koji IGARASHI Satoshi SAITO Masato KISHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/01/01
Vol. E85-C  No. 1  pp. 141-149
Type of Manuscript:  INVITED PAPER (Special Issue on Ultrafast Optical Signal Processing and Its Application)
Category: Optical Pulse Compression, Control and Monitoring
Keyword: 
optical pulse compression, optical soliton pulse propagation, higher order solitons, dispersion-flattened fibers, 
 Summary | Full Text:PDF(695.9KB)