基于自适应光学的大气光通信波前校正实验

Transmission Wave-front correction of atmospheric optical communication based on adaptive optics technology

摘要:

为了缓解大气光通信中由于大气湍流的影响而产生的波前畸变、反射等严重影响通信质量的现象，文章采用了自适应光学技术，即对畸变波前进行重构后再利用反射变形镜进行修正的方法，从理论分析、实验研究方面开展了自适应光学修正传输波前的研究工作。研究结果表明：在相同实验条件下，在保持链路误码率定量为(1×10-6)时，使用自适应光学技术比不使用时系统发射功率减小了50%。在近地大气激光通信中，自适应光学技术在增加系统增益，减小系统误码率方面效果显著。

Abstract:

In order to address the issues such as wave-front distortion，reflection and other phenomena in atmospheric optical communication，which seriously affect the communication quality，the Adaptive Optics(AO) technology was used to reconstruct the distorted wave-front, then reflective mirrors were used to amend the aberrations．Theoretical analysis, simulation and experiments were performed. The result indicated that under the same experimental conditions, as the Bit Error Ratio(BER) of the system kept the value of 1×10-6，the system transmitting power when using adaptive optics technology had been reduced by half than that when not using adaptive optics technology. In the Near-earth atmospheric laser communications, the effects of AO in increasing the system gain and reducing the system bit error rate are significant.