Title :
Improvement of tolerance to intra-channel non-linear effect of coherent higher-order multilevel signaling with digital delay-detection
Author :
Kikuchi, Naoya ; Sasaki, Seishi ; Uda, Tetsuya
Author_Institution :
Central Res. Lab., Hitachi Ltd., Hitachi, Japan
Abstract :
We experimentally show 1.8-dB improvement of the tolerance to intra-channel non-linearity of coherent PM-16QAM signal using digital-delay detection over highly-dispersed links (Ex. SSMFs and long NZDSFs). The use of CD pre-distortion is also proposed to compensate its performance drop in low dispersion links.
Keywords :
compensation; light coherence; nonlinear optics; optical distortion; optical fibre communication; optical fibre dispersion; optical modulation; pulse modulation; quadrature amplitude modulation; tolerance analysis; CD predistortion; NZDSF; SSMF; coherent PM-16QAM signal; coherent higher-order multilevel signaling; digital delay-detection; highly-dispersed links; intrachannel nonlinear effect; low dispersion links; Delays; Detectors; Modulation; Optical attenuators; Optical fiber dispersion; Phase noise;
Conference_Titel :
Optical Communications (ECOC), 2012 38th European Conference and Exhibition on
Conference_Location :
Amsterdam
