Title :
Bit error evaluation of optically preamplified direct detection receivers with Fabry-Perot optical filters
Author :
Monroy, Idelfonso Tafur ; Einarsson, Göran
Author_Institution :
Dept. of Electr. Eng., Eindhoven Univ. of Technol., Netherlands
fDate :
8/1/1997 12:00:00 AM
Abstract :
The error performance of a preamplified, direct detection receiver with an optical filter of the Lorentzian type is studied. The analysis takes into account the influence of the optical intersymbol interference (ISI). A closed-form expression of the moment generating function (MGF) of the decision variable is derived. Error probabilities are evaluated from the MGF using a saddlepoint approximation. The Gaussian approximation is also examined. The detection sensitivity in terms of a quantum limit is calculated. The results show that there exists an optimum optical bandwidth, the reason being a tradeoff between the effect of ISI and the spontaneous emission noise. It is also shown that the Gaussian approximation gives a good estimate of the error probability, allowing to find in a simple manner the optimum parameters of optically preamplified, direct detection receiver
Keywords :
approximation theory; intersymbol interference; optical filters; optical receivers; probability; sensitivity; spontaneous emission; Fabry-Perot optical filters; Gaussian approximation; Lorentzian type; bit error evaluation; closed-form expression; decision variable; detection sensitivity; direct detection receiver; error performance; error probability; moment generating function; optical filter; optical intersymbol interference; optically preamplified direct detection receivers; optimum optical bandwidth; optimum parameters; quantum limit; saddlepoint approximation; spontaneous emission noise; Closed-form solution; Error probability; Gaussian approximation; Intersymbol interference; Optical detectors; Optical filters; Optical noise; Optical receivers; Optical sensors; Stimulated emission;
Journal_Title :
Lightwave Technology, Journal of