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8 September 2006 Simulation of crosstalk in integrated distributed feedback laser-photodiode optical transceivers
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Proceedings Volume 6343, Photonics North 2006; 63431D (2006) https://doi.org/10.1117/12.707724
Event: Photonics North 2006, 2006, Quebec City, Canada
Abstract
In this paper, modulation crosstalk from 1310nm Distributed Feedback laser (DFB) upstream signals to 1490nm downstream signals in the monolithic integrated DFB-PD (Distributed Feedback laser-Photodiode) optical transceiver structure was simulated by the time-domain traveling wave (TDTW) rate equations numerically. It was found that high differential gain coefficient at 1490nm can contribute to the modulation crosstalk at about -25 to -30 dB. It was also found that the modulation crosstalk is modulation frequency dependent which will be enhanced about 3 dB at the relaxation oscillation frequency compared with low modulation frequency. Increasing modulation extinction ratio of the 1310nm DFB section from 10 to 18 dB, the crosstalk increases 3 dB. Such a higher modulation crosstalk (larger than -30 dB) should be considered since such crosstalk will degrade strongly the sensitivity of the 1490nm photo-detector.
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Qingyang Xu, Xiaobin Hong, Wanguo Liang, Xun Li, Chang-Qing Xu, and Wei-Ping Huang "Simulation of crosstalk in integrated distributed feedback laser-photodiode optical transceivers", Proc. SPIE 6343, Photonics North 2006, 63431D (8 September 2006); https://doi.org/10.1117/12.707724
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