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Simple technique to improve the spectral quality of gain-switched pulses from a DFB laser

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3 Author(s)
Barry, L.P. ; France Telecom, CNET, Lannion ; Debeau, J. ; Boittin, R.

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

Published in:

Electronics Letters  (Volume:30 ,  Issue: 25 )