Effects of pedestal suppression on gain-switched laser sources for 40 Gbit/s OTDM transmission

P. L. Mason, A. Wonfor, D. D. Marcenac, D. G. Moodie, M. C. Brierley, R. V. Penty, I. H. White, S. Bouchoule

Research output: Contribution to journalConference articlepeer-review

11 Citations (SciVal)


The performance of 40 Gbit/s optical time-division multiplexed (OTDM) communication systems can be severely limited when the extinction ratio of the optical pulses is low. This is a consequence of the coherent interference noise between individual OTDM channels. When taken alone, the multiple quantum well-distributed feedback laser+dispersion compensating fiber source exhibits a relatively poor extinction ratio which impairs its potential for use in a 40 Gbit/s OTDM system. However, with the addition of an electroabsorption modulator to suppress the pulse pedestals to better than 30 dB extinction, coherent interference noise is reduced, the bit-error-rate performance is greatly improved, and the source shows good potential for 40 Gbit/s OTDM communication.

Original languageEnglish
Pages (from-to)289-290
Number of pages2
JournalConference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
Publication statusPublished - 1 Dec 1997
EventProceedings of the 1997 10th IEEE Lasers and Electro-Optics Society Annual Meeting, LEOS. Part 2 (of 2) - San Francisco, CA, USA
Duration: 10 Nov 199713 Nov 1997

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering


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