Title :
SOA-based regenerative amplification of phase-noise-degraded DPSK signals: dynamic analysis and demonstration
Author :
Grigoryan, Vladimir S. ; Shin, Myunghun ; Devgan, Preetpaul ; Lasri, Jacob ; Kumar, Prem
Author_Institution :
Dept. of Electr. & Comput. Eng., Northwestern Univ., Evanston, IL, USA
Abstract :
A theoretical analysis and an experimental demonstration of semiconductor optical amplifier (SOA)-based regenerative amplification (SORA) of phase noise (PN)-degraded return-to-zero (RZ) differential phase-shift keying (DPSK) signals are presented. The Q-factor improvement is 1.6 dB in single-channel and about 0.8 dB in two non-demultiplexed-channel regimes. The key physical mechanism that enables regeneration by the SORA is the discriminative gain provided by the SOA for the logical 0s versus the logical 1s when two mutually antisymmetric ON-OFF keying (OOK) data trains, created by the DPSK signal, collide in the SOA. The modeling results agree with the experiment.
Keywords :
Q-factor; amplitude shift keying; differential phase shift keying; optical communication equipment; optical noise; phase noise; semiconductor optical amplifiers; DPSK signals; Q -factor; SOA; differential phase-shift keying; nondemultiplexed-channel regimes; on-off keying; phase noise; phase-noise-degraded signals; regenerative amplification; return-to-zero signals; semiconductor optical amplifier; Differential quadrature phase shift keying; Fiber nonlinear optics; Optical fiber communication; Optical receivers; Optical signal processing; Phase noise; Repeaters; Semiconductor device noise; Semiconductor optical amplifiers; Signal analysis; Differential phase-shift keying; nonlinear filters; optical communication equipment; semiconductor optical amplifiers; signal restoration;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.861134
