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Proceedings Paper

Investigation on the BER performance of the MSK space downlink laser communication system with a power EDFA
Author(s): Wenxiang Jiao; Mi Li; Xuping Zhang; Shandong Dong; Yuejiang Song; Yuangang Lu
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Paper 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.

Paper Details

Date Published: 24 October 2014
PDF: 9 pages
Proc. SPIE 9270, Optoelectronic Devices and Integration V, 927017 (24 October 2014); doi: 10.1117/12.2073582
Show Author Affiliations
Wenxiang Jiao, Nanjing Univ. (China)
Mi Li, Nanjing Univ. (China)
Xuping Zhang, Nanjing Univ. (China)
Shandong Dong, Nanjing Univ. (China)
Yuejiang Song, Nanjing Univ. (China)
Yuangang Lu, Nanjing Univ. (China)

Published in SPIE Proceedings Vol. 9270:
Optoelectronic Devices and Integration V
Xuping Zhang; Hai Ming; Changyuan Yu, Editor(s)

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