Title :
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
fDate :
6/1/1992 12:00:00 AM
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;
Journal_Title :
Lightwave Technology, Journal of
