Title :
Photon point process for traveling-wave laser amplifiers
Author :
Li, Tao ; Teich, Malvin C.
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY, USA
fDate :
9/1/1993 12:00:00 AM
Abstract :
The authors determine the evolution of the photon point process of a light beam as it passes through a traveling-wave laser amplifier (TWA). In particular, when coherent light is presented to the input of the amplifier, the output photon statistics are characterized by a marked-Poisson (MP) point process, which has a noncentral-negative-binomial (NNB) output photon-number distribution (PND). Using this distribution we calculate the probability of error (PE) for an ON-OFF keying (OOK) direct-detection photon-counting communication system, and show that the results differ somewhat from those obtained when the Gaussian-PND approximation is used. It is shown that receiver performance is optimized by filtering the amplifier output. Analysis of the point process is of interest because it permits the time response of the amplifier to be determined; this, in turn, allows the effects of intersymbol interference to be calculated
Keywords :
errors; intersymbol interference; laser theory; optical communication; optical receivers; photon counting; probability; statistics; Gaussian-PND approximation; ON-OFF keying; OOK direct-detection photon-counting communication system; amplifier input; amplifier output filtering; coherent light; error probability; intersymbol interference; light beam; marked-Poisson point process; noncentral-negative-binomial output photon-number distribution; output photon statistics; photon point process; receiver performance; time response; traveling-wave laser amplifiers; Distributed amplifiers; Filtering; Gaussian approximation; Gaussian distribution; Intersymbol interference; Laser beams; Optical receivers; Probability; Statistical distributions; Time factors;
Journal_Title :
Quantum Electronics, IEEE Journal of
