Title :
Robustness of DPSK-WDM systems against nonlinear polarization fluctuation
Author :
Lu, Guo-Wei ; Chan, Kit ; Chen, Lian-Kuan ; Chan, Chun-kit
Author_Institution :
Dept. of Inf. Eng., Chinese Univ. of Hong Kong, China
fDate :
3/1/2004 12:00:00 AM
Abstract :
Nonlinear polarization fluctuation (NPF) induced by cross-phase modulation may severely limit the performance of wavelength-division-multiplexing (WDM) systems that employ polarization-dependent devices. In this letter, we experimentally investigate and compare the system degradation due to NPF in 10-Gb/s WDM systems among nonreturn-to-zero (NRZ)-, return-to-zero (RZ)-on-off keying (OOK) and NRZ-, RZ-differential phase-shift keying (DPSK) modulation formats. The DPSK format, especially NRZ-DPSK, shows significant enhancement in input power dynamic range over the OOK format.
Keywords :
amplitude shift keying; differential phase shift keying; optical fibre communication; optical fibre polarisation; optical modulation; optical receivers; phase modulation; wavelength division multiplexing; DPSK modulation format; DPSK-WDM systems; NRZ-differential phase-shift keying; NRZ-on-off keying; OOK format; RZ-differential phase-shift keying; RZ-on-off keying; cross-phase modulation; dynamic range; nonlinear polarization fluctuation; nonreturn-to-zero-on-off keying; return-to-zero-on-off keying; wavelength-division-multiplexing systems; Degradation; Differential phase shift keying; Differential quadrature phase shift keying; Dynamic range; Fluctuations; Optical fiber polarization; Phase modulation; Probes; Robustness; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.823767
