Experimental investigation of the impact of optical injection on vital parameters of a gain-switched pulse source
Guignard, Celine and Anandarajah, Prince M. and Clarke, Aisling M. and Barry, Liam P. and Vaudel, O. and Besnard, P. (2007) Experimental investigation of the impact of optical injection on vital parameters of a gain-switched pulse source. Optics Communications, 277 (1). pp. 150-155. ISSN 0030-4018
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An analysis of optical injection on a gain-switched distributed feedback (DFB) laser and its impact on pulse parameters that influence the performance of the pulse source in high-speed optical communication systems is presented in this paper. A range of 10 GHz in detuning and 5 dB in injected power has been experimentally identified to attain pulses, from an optically injected gain-switched DFB laser, with durations below 10 ps and pedestal suppression higher than 35 dB. These pulse features are associated with a side mode suppression ratio of about 30 dB and a timing jitter of less than 1 ps. This demonstrates the feasibility of using optical injection in conjunction with appropriate pulse compression schemes for developing an optimized and cost-efficient pulse source, based on a gain-switched DFB laser, for high-speed photonic systems.
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