Title :
The effects of pedestal suppression on gain-switched laser sources for 40 Gbit/s OTDM transmission
Author :
Mason, P.L. ; Wonfor, A. ; Marcenac, D.D. ; Moodie, D.G. ; Brierley, M.C. ; Penty, R.V. ; White, I.H. ; Bouchoule, S.
Author_Institution :
Centre for Commun. Res., Bristol Univ., UK
Abstract :
The MQW DFB grating semiconductor laser (GSL)+ dispersion compensated fibre (DCF) source taken alone exhibits a relatively poor extinction ratio (-20dB) which impairs its potential for use in a 40 Gbit/s optical time domain multiplexing (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 much reduced and the BER performance is greatly improved. This enhanced source shows good potential for 40 Gbit/s OTDM communication
Keywords :
compensation; distributed feedback lasers; electro-optical modulation; electroabsorption; laser noise; optical communication equipment; optical fibre dispersion; quantum well lasers; time division multiplexing; 40 Gbit/s; BER performance; Gbit/s OTDM communication; Gbit/s OTDM transmission; Gbit/s optical time domain multiplexing; MQW DFB grating semiconductor laser; dB extinction; dispersion compensated fibre source; electroabsorption modulator; gain-switched laser sources; pedestal suppression; poor extinction ratio; pulse pedestals; Extinction ratio; Fiber gratings; Fiber lasers; Interference suppression; Optical modulation; Optical noise; Optical pulses; Pulse modulation; Quantum well devices; Semiconductor lasers;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1997. LEOS '97 10th Annual Meeting. Conference Proceedings., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3895-2
DOI :
10.1109/LEOS.1997.630629
