Cross-phase-modulation-induced nonlinear phase noise in WDM direct-detection DPSK systems

2003 ◽  
Vol 21 (8) ◽  
pp. 1770-1774 ◽  
Author(s):  
Hoon Kim
Keyword(s):  
Phase Noise ◽  
Phase Modulation ◽  
Direct Detection ◽  
Cross Phase Modulation ◽  
Nonlinear Phase

scholarly journals INFLUENCE OF POLARIZATION MODE DISPERSION ON THE EFFECT OF CROSS-PHASE MODULATION IN INTENSITY MODULATION-DIRECT DETECTION WDM TRANSMISSION SYSTEM

2010 ◽  
Vol 10 (2) ◽  
pp. 87-96
Author(s):  
M S Islam
Keyword(s):  
Phase Modulation ◽  
Direct Detection ◽  
Polarization Mode Dispersion ◽  
Intensity Modulation ◽  
Modulation Amplitude ◽  
Polarization Mode ◽  
Cross Phase Modulation ◽  
Channel Spacing ◽  
Mode Dispersion ◽  
The Impact

Cross-phase modulation (XPM) changes the state-of-polarization (SOP) of the channels through nonlinear polarization rotation and induces nonlinear time dependent phase shift for polarization components that leads to amplitude modulation of the propagating waves in a wavelength division multiplexing (WDM) system. Due to the presence of birefringence, the angle between the SOP changes randomly and as a result polarization mode dispersion (PMD) causes XPM modulation amplitude fluctuation random in the perturbed channel. In this paper we analytically determine the probability density function of the random angle between the SOP of pump and probe, and evaluate the impact of polarization mode dispersion on XPM in terms of bit error rate, channel spacing etc for a two channel intensity modulation-direct detection WDM system at 10 Gb/s. It is found that the XPM induced crosstalk is polarization independent for channel spacing greater than 3 nm or PMD coefficient larger than 2 ps/√km. We also investigate the dependence of SOP variance on PMD coefficient and channel spacing.

Impact of nonlinear phase noise on direct-detection DQPSK WDM systems

2005 ◽  
Vol 17 (7) ◽  
pp. 1423-1425 ◽  
Author(s):  
Xuetian Huang ◽  
Lei Zhang ◽  
Min Zhang ◽  
Peida Ye
Keyword(s):  
Phase Noise ◽  
Direct Detection ◽  
Nonlinear Phase
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