Heterodyne ASK multiport optical receivers using postdetection filtering

Author

Siuzdak, J. ; van Etten, W.

Volume

8

Issue

1

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

71

Lastpage

77

Abstract

A theoretical model for heterodyne amplitude-shift-keying (ASK) multiport optical receivers is presented. It applies when the transmitter and local oscillator have significant linewidths. The modeled receiver uses square law detection and postdetection filtering. The model allows for the essentially non-Gaussian character of the probability density function of the noise process at the input of the threshold comparator. Numerical computations are made for the {2×2} multiport receiver. They show that such a receiver can handle laser linewidths on the order of the bit rate with 1.5-dB loss as compared to the ideal heterodyne receiver with zero linewidth

Keywords

amplitude modulation; filters; optical communication equipment; optical modulation; photodetectors; receivers; 1.5 dB; ASK multiport optical receivers; bit rate; comparator input noise; heterodyne amplitude-shift-keying; laser linewidths; linewidths; local oscillator; multiport optical receivers; noise process; photodetectors; postdetection filtering; probability density function; square law detection; threshold comparator; transmitter; Amplitude shift keying; Filtering; Laser modes; Laser noise; Local oscillators; Optical filters; Optical noise; Optical receivers; Optical transmitters; Probability density function;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.45932

Filename

45932