Investigation on the BER performance of the MSK space downlink laser communication system with a power EDFA

Wenxiang Jiao; Mi Li; Xuping Zhang; Shandong Dong; Yuejiang Song; Yuangang Lu

doi:10.1117/12.2073582

24 October 2014 Investigation on the BER performance of the MSK space downlink laser communication system with a power EDFA

Wenxiang Jiao, Mi Li, Xuping Zhang, Shandong Dong, Yuejiang Song, Yuangang Lu

Author Affiliations +

Proceedings Volume 9270, Optoelectronic Devices and Integration V; 927017 (2014) https://doi.org/10.1117/12.2073582
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

For a space downlink laser communication system with an EDFA as a power amplifier, the performance of its BER deteriorates because the EDFA’s characteristics are badly impacted by space radiation. As is investigated in this paper, small divergence-angle, lower than 30μrad, assures that the BER is lower than10^-20 although the increase of radiation dose from 0Gy to 250Gy leads to 20 orders of magnitude increase of the BER. Such perfection results from our selection of optimal parameters. In the case of zenith angle, the BER increases smoothly when the zenith angle is lower than 10 degrees. After the point of 10 degrees, however, the BER starts its linearly fast increase. Increasing the radiation dose makes the BER increase and such evolution trend more smooth. Moreover, the increase of receiving diameter leads to linear reduce of BER. It is interesting to note that the evolution becomes nonlinear in region of low receiving diameter when we change the divergence-angle to a higher value 60μrad. Besides, suffering radiation makes the non-linearity mentioned above more apparent. Another try to change the zenith angle to higher value 45° does not show obvious nonlinear effect but it worsens the performance of BER quite a lot. Commonly, the impact of radiation will reach its saturation when the dose of radiation continues to increase. The work will benefit the design of practical space laser communication system with EDFAs.

Citation Download Citation

Wenxiang Jiao, Mi Li, Xuping Zhang, Shandong Dong, Yuejiang Song, and Yuangang Lu "Investigation on the BER performance of the MSK space downlink laser communication system with a power EDFA", Proc. SPIE 9270, Optoelectronic Devices and Integration V, 927017 (24 October 2014); https://doi.org/10.1117/12.2073582

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