Title :
SNR improvement of DPSK signals in a semiconductor optical regenerative amplifier
Author :
Shin, Myunghun ; Devgan, Preetpaul S. ; Grigoryan, Vladimir S. ; Kumar, Prem
Author_Institution :
Electr. & Comput. Eng. Dept., Northwestern Univ., Evanston, IL, USA
Abstract :
Signal-to-noise ratio improvement using a semiconductor optical regenerative amplifier (SORA) is characterized. It is demonstrated that for a noise-degraded return-to-zero differential phase-shift keying signal at 10 Gb/s the Q factor at the SORA´s output is improved relative to its input for both the phase and amplitude noise cases. The Q-factor improvement is 1.6 dB in single-channel operation for the phase-noise only case and 0.55 dB for the amplified spontaneous emission noise-only case through the SORA.
Keywords :
Q-factor; differential phase shift keying; optical communication equipment; optical fibre communication; optical noise; phase noise; semiconductor optical amplifiers; spontaneous emission; 10 Gbit/s; DPSK signals; Q factor; SNR improvement; amplified spontaneous emission; differential phase-shift keying signal; noise-degradation; phase-noise; return-to-zero signal; semiconductor optical regenerative amplifier; signal-to-noise ratio; single-channel operation; Differential quadrature phase shift keying; Noise level; Optical noise; Phase noise; Q factor; Repeaters; Semiconductor device noise; Semiconductor optical amplifiers; Signal to noise ratio; Stimulated emission; Differential phase-shift keying (DPSK); optical regeneration; semiconductor optical amplifier (SOA);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.860075
