Suppression of laser frequency drifts caused by thermal transients in optical WDM packet switching systems

8 November 1990

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

Vol. 26 (23) , 1930-1932
https://doi.org/10.1049/el:19901249

Abstract

Frequency drifts caused by laser thermal transients have been identified as a major impairment in packet switching networks using multisection tunable lasers. They are induced by the heating changes caused by current steps used to switch the carrier frequency. A method to suppress this frequency drift in a FSK-WDM direct detection system through the use of a passive equalisation circuit is presented.

Keywords

PASSIVE EQUALISATION CIRCUIT
WIDE CONTINUOUS TUNING CHARACTERISTICS
MULTISECTION TUNABLE LASERS
PACKET SWITCHING NETWORKS
CARRIER FREQUENCY
MULTISECTION DBR LASERS
THERMAL TRANSIENTS
CURRENT STEPS
LASER FREQUENCY DRIFT SUPPRESSION
OPTICAL WDM PACKET SWITCHING SYSTEMS
HEATING CHANGES
FSK-WDM DIRECT DETECTION SYSTEM

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