Title :
565 Mbit/s AMI FSK coherent system using commercial DFB lasers
Author_Institution :
British Telecom Res. Labs., Ipswich, UK
fDate :
5/25/1989 12:00:00 AM
Abstract :
Alternate mark invert (AMI) encoding is shown to overcome the low-frequency nonlinear FM response of DFB lasers. Results from an experimental heterodyne system are presented where the local oscillator (LO) and the signal carrier are at nearly the same frequency. This has the same sensitivity in theory as an ideal single-filter FSK detection system and offers the advantage of a compact optical spectrum when used in FDM systems.
Keywords :
digital communication systems; distributed feedback lasers; encoding; error statistics; frequency shift keying; optical links; semiconductor junction lasers; 565 Mbit/s; AMI encoding; BER; FDM systems; FSK coherent system; alternate mark invert; bit error rate; commercial DFB lasers; compact optical spectrum; frequency shift keying; heterodyne system; low-frequency nonlinear FM response; optical links;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19890496
