Title :
Optimum phase deviations between mark-and space-state bits in long-haul coherent communication systems with balanced PLL receivers
Author :
Huang, Chau-Chiun ; Wang, Likarn
Author_Institution :
Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
fDate :
10/1/1995 12:00:00 AM
Abstract :
In this paper, we report the importance of the optimum phase deviation between mark-state and space-state bits in a long-haul PSK homodyne system with a balanced phase-locked-loop (PLL) receiver. The laser phase noise, data-to-phase-lock crosstalk, receiver shot noise and amplifier noise are considered in analyzing the systems with cascaded optical amplifier chains. The signal power penalty incurred by improper use of phase deviations in a long-haul system is evaluated. It is found that such power penalty can amount to larger than 1.5 dB in a 10-Gbt/sec system
Keywords :
optical crosstalk; optical modulation; optical noise; optical receivers; phase locked loops; phase noise; phase shift keying; shot noise; 10 Gbit/s; amplifier noise; balanced PLL receivers; balanced phase-locked-loop receiver; cascaded optical amplifier chain; data-to-phase-lock crosstalk; laser phase noise; long-haul PSK homodyne system; long-haul coherent communication systems; long-haul system; mark-and-state bits; optimum phase deviation; phase deviations; power penalty; receiver shot noise; signal power penalty; space-state bits; Crosstalk; Laser noise; Optical amplifiers; Optical noise; Optical receivers; Phase locked loops; Phase noise; Phase shift keying; Quantum cascade lasers; Semiconductor optical amplifiers;
Journal_Title :
Lightwave Technology, Journal of
