Effects of fog on the bit-error rate of a free-space laser communication system.
Effects of fog on the bit-error rate of a free-space laser communication system.
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DOI：
10.1364/ao.38.000424
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发表时间：
1999-01
期刊：
影响因子：
1.9
通讯作者：
Brian R. Strickland;Michael J. Lavan;Eric L. Woodbridge;Victor J. Chan
中科院分区：
文献类型：
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作者：
Brian R. Strickland;Michael J. Lavan;Eric L. Woodbridge;Victor J. Chan
自由空间激光通信（lasercom）系统的性能下降时，浓雾或烟雾模糊的视线。在2.4km的折叠路径上，研究了高带宽（570 Mbits/s）激光通信系统的误码率与大气传输的关系。当大气透射率低至0.25%时，观察到10（-7）的BER，而当透射率高于2.5%时，观察到小于10（-10）的BER。系统性能比计算值低约10 dB，差异归因于闪烁、多重散射和吸收。810 nm通信激光器的峰值功率为186 mW，光束发散度被故意降低到830 murad。这些结果是在没有使用纠错方案或主动跟踪的情况下实现的。一个优化的系统，具有更窄的光束发散和主动跟踪可以预期产生显着更好的性能。
Free-space laser communication (lasercom) systems are subject to performance degradation when heavy fog or smoke obscures the line of sight. The bit-error rate (BER) of a high-bandwidth (570 Mbits/s) lasercom system was correlated with the atmospheric transmission over a folded path of 2.4 km. BER's of 10(-7) were observed when the atmospheric transmission was as low as 0.25%, whereas BER's of less than 10(-10) were observed when the transmission was above 2.5%. System performance was approximately 10 dB less than calculated, with the discrepancy attributed to scintillation, multiple scattering, and absorption. Peak power of the 810-nm communications laser was 186 mW, and the beam divergence was purposely degraded to 830 murad. These results were achieved without the use of error correction schemes or active tracking. An optimized system with narrower beam divergence and active tracking could be expected to yield significantly better performance.