Title :
Laser Phase Noise in Coherent and Differential Optical Transmission Revisited in the Polar Domain
Author :
Atzmon, Yuval ; Nazarathy, Moshe
Author_Institution :
Dept. of Electr. Eng., Technion - Israel Inst. of Technol., Haifa
Abstract :
We revisit the treatment of laser phase noise, with particular application to coherent and differential phase-shift keyed (PSK) systems, developing a considerably simplified yet very accurate analysis based on the phase-noise exponent commutation (PNEC) premise that the receive filtering may be effectively applied in the polar (angular) domain and treating for the first time arbitrary transmit pulses (e.g., return to zero) and optical filter responses (still without intersymbol interference). The PNEC concept directly implies that the angle of the PSK and differential PSK decision statistic is Gaussian distributed, which is verified numerically as very accurate, by means of importance-sampling-based Monte Carlo simulations.
Keywords :
Gaussian distribution; Monte Carlo methods; differential phase shift keying; laser noise; optical fibre communication; optical fibre filters; optical transmitters; phase noise; Gaussian distribution; Monte Carlo simulation; PNEC; PSK; arbitrary transmit pulse; differential optical transmission; differential phase-shift keyed system; fiber-optic communication; laser phase noise; optical filter response; phase-noise exponent commutation; polar domain; return-to-zero modulation; Fiber nonlinear optics; High speed optical techniques; Laser noise; Nonlinear optics; Optical feedback; Optical filters; Optical interferometry; Optical noise; Optical receivers; Phase noise; Coherent transmission; differential phase-shift keying (DPSK); laser linewidth; laser noise; optical filtering; perturbation; phase noise; phase-shift keying (PSK); return to zero (RZ);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2008.925036
