Title :
Simple technique to improve the spectral quality of gain-switched pulses from a DFB laser
Author :
Barry, Liam P. ; Debeau, J. ; Boittin, R.
Author_Institution :
France Telecom, CNET, Lannion
fDate :
12/8/1994 12:00:00 AM
Abstract :
The authors show that by coupling the output from a gain-switched DFB laser to a fibre loop mirror the spectral quality of the gain-switched pulse can be greatly improved. The SMSR of a gain-switched 1.5 μm DFB has been increased by 25 dB, and also the chirp has been reduced, by using this technique. This spectral improvement is vitally important in systems where the gain-switched pulses will pass an optical filter
Keywords :
distributed feedback lasers; laser cavity resonators; laser mirrors; optical fibre couplers; optical filters; semiconductor lasers; 1.5 mum; DFB laser; chirp; fibre loop mirror; gain-switched pulse; gain-switched pulses; optical filter; spectral improvement; spectral quality;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19941462
