565 Mbit/s AMI FSK coherent system using commercial DFB lasers

25 May 1989

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 25 (11) , 732-734
https://doi.org/10.1049/el:19890496

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

FSK COHERENT SYSTEM
565 MBIT/S
BIT ERROR RATE
FREQUENCY SHIFT KEYING
OPTICAL LINKS
BER
LOW-FREQUENCY NONLINEAR FM RESPONSE
AMI ENCODING
FDM SYSTEMS
COMMERCIAL DFB LASERS
ALTERNATE MARK INVERT
COMPACT OPTICAL SPECTRUM
HETERODYNE SYSTEM

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