Title :
PMD monitoring by tracking the chromatic-dispersion-insensitive RF power of the vestigial sideband
Author :
Luo, T. ; Pan, Z. ; Nezam, S. M R Motaghian ; Yan, L.-S. ; Sahin, A.B. ; Willner, A.E.
Author_Institution :
Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
We demonstrate a simple technique for polarization-mode-dispersion (PMD) monitoring that is insensitive to chromatic dispersion (CD). By monitoring the extracted radio-frequency clock power from the vestigial sideband, a CD-insensitive PMD feedback signal is realized. For a 10-Gb/s return-to-zero (RZ) system, experimental results show that the fluctuation of the feedback clock power due to CD is reduced from ∼20 to ∼3 dB. In the presence of all-order PMD, the distribution of the clock power is essentially unchanged as the inline CD varies. Simulation results for a 40-Gb/s RZ system are also presented.
Keywords :
clocks; microwave photonics; monitoring; optical feedback; optical fibre communication; optical fibre dispersion; optical fibre polarisation; optical fibre testing; optical modulation; 10 Gbit/s; 40 Gbit/s; PMD monitoring; chromatic-dispersion-insensitive RF power; feedback clock power; polarization-mode-dispersion monitoring; return-to-zero system; vestigial sideband; Chromatic dispersion; Clocks; High speed optical techniques; Monitoring; Optical feedback; Optical fiber polarization; Optical sensors; Optical transmitters; Radio frequency; Signal detection;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.833110
