一种用于补偿零差干涉仪中非线性的无源方法。
A passive method to compensate nonlinearity in a homodyne interferometer.
作者信息
Ahn Jeongho, Kim Jong-Ahn, Kang Chu-Shik, Kim Jae Wan, Kim Soohyun
机构信息
Division of Mechanical Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon, 305-701, Republic of Korea.
出版信息
Opt Express. 2009 Dec 7;17(25):23299-308. doi: 10.1364/OE.17.023299.
This study presents an analysis of the nonlinearity resulting from polarization crosstalk at a polarizing beam splitter (PBS) and a wave plate (WP) in a homodyne interferometer. From a theoretical approach, a new compensation method involving a realignment of the axes of WPs to some specific angles according to the characteristics of the PBS is introduced. This method suppresses the nonlinearity in a homodyne interferometer to 0.36 nm, which would be 3.75 nm with conventional alignment methods of WPs.
本研究对零差干涉仪中偏振分束器（PBS）和波片（WP）处偏振串扰导致的非线性进行了分析。从理论方法出发，引入了一种新的补偿方法，即根据PBS的特性将波片的轴重新对准到一些特定角度。该方法将零差干涉仪中的非线性抑制到0.36纳米，而采用传统的波片对准方法时该非线性为3.75纳米。
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