Orbital angular momentum (OAM) spectrum correction in free space optical communication
Orbital angular momentum (OAM) spectrum correction in free space optical communication
复制标题
自由空间光通信中的轨道角动量 (OAM) 频谱校正
DOI：
10.1364/oe.16.007091
复制
发表时间：
2008-05-12
期刊：
影响因子：
3.8
通讯作者：
Weber, Horst
中科院分区：
文献类型：
--
作者：
Liu, Yi-Dong;Gao, Chunqing;Weber, Horst
激光的轨道角动量(OAM)在自由空间光通信中具有潜在的应用前景，但它对光束的指向不稳定性，即光束的位移(横向位移)和倾斜(光束的偏转)非常敏感。本文提出了一种以轨道角动量均方值为指标来校正OAM谱失真的方法。给出了定性分析，并进行了数值模拟验证。结果表明，均方值可以用来确定叠加螺旋束的束轴。可以恢复初始的OAM频谱。(C)2008年美国光学学会。
Orbital angular momentum (OAM) of laser beams has potential application in free space optical communication, but it is sensitive against pointing instabilities of the beam, i. e. shift (lateral displacement) and tilt (deflection of the beam). This work proposes a method to correct the distorted OAM spectrum by using the mean square value of the orbital angular momentum as an indicator. Qualitative analysis is given, and the numerical simulation is carried out for demonstration. The results show that the mean square value can be used to determine the beam axis of the superimposed helical beams. The initial OAM spectrum can be recovered. (C) 2008 Optical Society of America.