Experimental investigation of the impact of optical injection on vital parameters of a gain-switched pulse source |
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Authors: | C Guignard A Clarke O Vaudel P Besnard |
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Institution: | Research Institute for Network and Communications Engineering, School of Electronic Engineering, DCU, Dublin 9, Ireland |
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Abstract: | 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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Keywords: | Semiconductor lasers Pulse generation Optical injection Frequency resolved optical gating Optical pulse measurement |
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