Optimal source linewidth in a coherence multiplexed optical fiber communications system

Author

Blair, Darren A. ; Cormack, George D.

Author_Institution

Telecommunications Res. Lab., Edmonton, Alta., Canada

Volume

10

Issue

6

fYear

1992

fDate

6/1/1992 12:00:00 AM

Firstpage

804

Lastpage

810

Abstract

In a fiber-based coherence multiplexed (CM) system, fiber path lengths must be carefully controlled. In an extrinsic reference ladder (ERL) CM system, two optical fibers are required to connect the transmitter array to each receiver. The effect of differential length variations between these two fibers is examined and is found to have significant impact on carrier-to-noise ratio (CNR). It is determined that, for a given differential mismatch length, there is an optimum value of optical source linewidth which maximizes system multiplexing capacity. An expression for the SNR of a certain multichannel digital CM communications system is developed

Keywords

light coherence; multiplexing; optical links; receivers; spectral line breadth; carrier-to-noise ratio; coherence multiplexed optical fiber communications system; differential length variations; differential mismatch length; extrinsic reference ladder; fiber path lengths; fibre couplers; multichannel digital CM communications system; optical interconnections; optical source linewidth; receiver; system multiplexing capacity; transmitter array; Distributed feedback devices; Fiber lasers; Optical feedback; Optical fiber communication; Optical fibers; Optical interferometry; Optical mixing; Optical receivers; Optical sensors; Optical transmitters;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.143081

Filename

143081