Title :
Effect of the Phase-Error of Local Oscillators in Digital Back-Propagation
Author_Institution :
Dept. of Electron. Eng., Hanyang Univ., Seoul, South Korea
Abstract :
The effect of the phase-error of local oscillators (LOs) on the performance of wavelength-division multiplexing (WDM) optical transmission systems employing digital back-propagation (DBP) is investigated. A simple model describing the performance degradation due to the phase-error is developed, and the validity of it is demonstrated by numerical simulations of 20-GHz-spaced-nine-channel orthogonal frequency division multiplexing (OFDM)-modulated transmissions. It is also shown that, whereas the variance of the phase-error should be less than 5° for the full benefit of the DBP, the performance is significantly improved by the DBP even when there is no control on the phase of LOs.
Keywords :
OFDM modulation; optical fibre communication; oscillators; wavelength division multiplexing; OFDM; digital back-propagation; local oscillators; phase-error; wavelength-division multiplexing optical transmission systems; Fiber nonlinear optics; Noise; Optical distortion; Optical fibers; Wavelength division multiplexing; Optical fiber communication; WDM transmission; digital back propagation; phase-error of local oscillators;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2374534
