Title :
Suppression of laser frequency drifts caused by thermal transients in optical WDM packet switching systems
Author :
Vicente de Vera, E.G. ; Glance, B.
Author_Institution :
AT&T Bell Labs., Holmdel, NJ, USA
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 :
distributed Bragg reflector lasers; equalisers; frequency division multiplexing; frequency shift keying; laser frequency stability; optical links; packet switching; tuning; FSK-WDM direct detection system; carrier frequency; current steps; heating changes; laser frequency drift suppression; multisection DBR lasers; multisection tunable lasers; optical WDM packet switching systems; packet switching networks; passive equalisation circuit; thermal transients; wide continuous tuning characteristics;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19901249
