Open AccessSingle SOA based simultaneous amplitude regeneration for WDM-PDM RZ-PSK signals
Author(s) -
Wenzhuo Wu,
Yu Yu,
Bingrong Zou,
Weili Yang,
Chi Zhang
Publication year - 2013
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.006718
Subject(s) - wavelength division multiplexing , optics , multiplexing , optical amplifier , phase shift keying , optical filter , amplitude modulation , physics , polarization (electrochemistry) , phase modulation , channel spacing , phase noise , wavelength , computer science , channel (broadcasting) , telecommunications , bit error rate , bandwidth (computing) , frequency modulation , laser , chemistry
We propose and demonstrate all-optical amplitude regeneration for the wavelength division multiplexing and polarization division multiplexing (WDM-PDM) return-to-zero phase shift keying (RZ-PSK) signals using a single semiconductor optical amplifier (SOA) and subsequent filtering. The regeneration is based on the cross phase modulation (XPM) effect in the saturated SOA and the subsequent narrow filtering. The spectrum of the distorted signal can be broadened due to the phase modulation induced by the synchronous optical clock signal. A narrow band pass filter is utilized to extract part of the broadened spectrum and remove the amplitude noise, while preserving the phase information. The working principle for multi-channel and polarization orthogonality preserving is analyzed. 4-channel dual polarization signals can be simultaneously amplitude regenerated without introducing wavelength and polarization demultiplexing. An average power penalty improvement of 1.75dB can be achieved for the WDM-PDM signals.