Improving free-space optical communication with adaptive optics for higher order modulation
Improving free-space optical communication with adaptive optics for higher order modulation
复制标题
利用自适应光学器件改善自由空间光通信以实现高阶调制
DOI：
10.1117/12.2568713
复制
发表时间：
2020
期刊：
影响因子：
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通讯作者：
Djordjevic, Ivan
中科院分区：
文献类型：
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作者：
Nafria, Vijay;Han, Xiao;Djordjevic, Ivan
自由空间光通信面临的最大挑战之一是大气湍流引起的波前像差。在FSO链路中，波前失真表现为接收功率、光束漂移、信息损失和闪烁效应的显著下降。大气湍流效应严重影响了FSO通信系统的性能。幸运的是，自适应光学系统提供了缓解性能下降的潜力，这也与量子通信应用有关。在我们的FSO实验中，我们实现了6.25GBD QPSK信号在无自适应光纤和有自适应光纤的FSO链路上的传输，工作波长为1550 nm。通过在空间光调制器(SLM)上应用随机柯尔莫戈洛夫位相屏，在我们的室内实验装置中模拟了大气像差。由于自适应光学的应用，我们展示了在功率收集、信噪比(SNR)和误码率(BER)方面的显著改进。
One of the biggest challenges of free-space optical (FSO) communication is the wave-front aberration due to atmospheric turbulence. In FSO links the wave-front distortion manifests as a significant drop in received power, beam wander, information loss, and scintillation effects. The performance of FSO communication system is degraded significantly by the atmospheric turbulence effects. Fortunately, the adaptive optics system offers potential to mitigate the performance degradation, which is relevant for quantum communication applications as well. In our FSO experiment, we perform the transmission of 6.25 GBd QPSK signal over an FSO link without and with adaptive optics, operating at 1550nm. We emulate the atmospheric aberration in our indoor experimental setup by applying random Kolmogorov phase screens on spatial light modulators (SLMs). We demonstrate significant improvements in the power-collected, signal-to-noise-ratio (SNR), and bit-error-rate (BER) performance due to the application of adaptive optics.
DOI：
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发表时间：
2019
期刊：
Principles and Applications of Free Space Optical Communications
影响因子：
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作者：
Z. Qu;I. Djordjevic
通讯作者：
I. Djordjevic