Title :
Effect of chromatic dispersion and initial chirp on the DOP feedback signal in PMD compensation
Author :
Zhang, Lu ; Xu, Yuan Zhong ; Hu, Qiang Gao ; Zhao, Sheng Zhi ; Liu, Shui Hua
Author_Institution :
Sch. of Inf. Sci. & Eng., Shandong Univ., Jinan, China
Abstract :
The impact of chromatic dispersion (CD) and initial chirp on the degree of polarization (DOP) feedback signal in polarization-mode dispersion (PMD) compensation is analyzed. Initial chirp affects DOP only in the presence of CD. The DOP distortion increases not only with the change of signal width due to CD and initial chirp, but also with the system bit rate. It degrades PMD compensation only if the same optimized DOP threshold (less than one) is chosen whenever with or without CD and initial chirp, and presents a weak effect on PMD compensation with the improvement of DOP threshold. Modifications to the degradation of PMD compensation are proposed finally according to the simulations of signal DOP properties in actual 10- and 40-Gb/s systems.
Keywords :
chirp modulation; optical feedback; optical fibre communication; optical fibre dispersion; optical fibre polarisation; optical fibre theory; 10 Gbit/s; 10-Gb/s system; 40 Gbit/s; 40-Gb/s system; DOP distortion; DOP feedback signal; DOP threshold; PMD compensation; chromatic dispersion; degree of polarization; initial chirp; polarization-mode dispersion; system bit rate; Bit rate; Chirp; Chromatic dispersion; Degradation; Delay; Optical distortion; Optical feedback; Optical fiber polarization; Optical fibers; Polarization mode dispersion; Chromatic dispersion (CD); degree of polarization (DOP); polarization-mode dispersion (PMD); signal initial chirp;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.839004
