Title :
Preclipping experiment for subcarrier-multiplexed AM/64QAM optical transmission
Author :
Tsushima, H. ; Kitamura, Kokoro
Author_Institution :
Hitachi Ltd., Totsuka
fDate :
10/12/1995 12:00:00 AM
Abstract :
Bit-error-rate degradation of the 64QAM signal due to clipping distortion caused by overmodulation at the laser diode is compensated for by preclipping for subcarrier-multiplexed AM; 64QAM optical transmission. The worst composite distortions of CSO<-60 dBc and CTB<-65 dBc have been achieved in the 40-channel AM signal band. It has also been confirmed that preclipping is more effective than Reed-Solomon (204, 188) error correction against clipping distortion
Keywords :
optical fibre communication; optical modulation; optical noise; optical transmitters; quadrature amplitude modulation; semiconductor lasers; subcarrier multiplexing; CSO; CTB; bit-error-rate degradation; clipping distortion; composite distortions; composite-second-order distortion; composite-triple-beat distortion; laser diode; overmodulation; preclipping experiment; subcarrier-multiplexed AM/64QAM optical transmission;
Journal_Title :
Electronics Letters
