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首页> 外文会议>Atmospheric Propagation IV; Proceedings of SPIE-The International Society for Optical Engineering; vol.6551 >Binary wavefront control in the focal plane for improved fiber coupling in air-to-air laser communication
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Binary wavefront control in the focal plane for improved fiber coupling in air-to-air laser communication

机译：焦平面中的二进制波前控制可改善空对空激光通信中的光纤耦合

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This paper investigates binary wavefront control in the focal plane to compensate for atmospheric turbulence in fiber-coupled free-space laser communication (LaserCom) systems. Traditional approaches to turbulence compensation (i.e., adaptive optics) modify optical phase in the pupil plane to improve the focal plane image or increase energy on target in the far field. For high-energy laser applications, focal plane phase modulation is problematic due to high power densities and device damage thresholds. However, LaserCom systems aim to use minimal power for reasons such as eye safety and covert communication. Thus, focal plane wavefront control is a reasonable approach for this application. Numerical results show that in an air-to-air scenario, binary phase modulation provides mean fiber coupling efficiency nearly identical to that resulting from ideal least-squares adaptive optics, but without the requirement for direct wavefront sensing. The binary phase commands are derived from a single imaging camera and an assumption about the nature of spot breakup. The use of binary wavefront control suggests that existing ferro-electric spatial light modulator technology may support real-time correction. Coupling efficiency results are also compared to those for the Strehl ratio, highlighting the importance of metric-driven design.
机译：本文研究了焦平面中的二进制波前控制，以补偿光纤耦合自由空间激光通信（LaserCom）系统中的大气湍流。湍流补偿的传统方法（即，自适应光学）修改光瞳平面中的光学相位，以改善焦平面图像或增加远场中目标的能量。对于高能量激光应用，焦平面相位调制由于高功率密度和器件损坏阈值而存在问题。但是，出于眼部安全和隐蔽通信等原因，LaserCom系统的目的是使用最少的功率。因此，焦平面波前控制对于该应用是一种合理的方法。数值结果表明，在空对空情况下，二进制相位调制提供的平均光纤耦合效率几乎与理想的最小二乘自适应光学系统所产生的效率相同，但无需直接进行波前传感。二进制相位命令是从单个成像摄像机得出的，并且假设有光斑破裂的性质。二进制波前控制的使用表明现有的铁电空间光调制器技术可以支持实时校正。还将耦合效率结果与Strehl比率的结果进行了比较，突出了度量驱动设计的重要性。

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