The demand for minimal cyclic nonlinearity error in laser interferometry is increasing as a result of advanced scientific research projects. Research shows that the quadrature phase error is the main effect that introduces cyclic nonlinearity error, and polarization-mixing cross talk during beam splitting is the main error source that causes the quadrature phase error. In this paper, a new homodyne quadrature laser interferometer configuration based on nonpolarization beam splitting and balanced interference between two circularly polarized laser beams is proposed. Theoretical modeling indicates that the polarization-mixing cross talk is elaborately avoided through nonpolarizing and Wollaston beam splitting, with a minimum number of quadrature phase error sources involved. Experimental results show that the cyclic nonlinearity error of the interferometer is up to 0.6 nm (peak-to-valley value) without any correction and can be further suppressed to 0.2 nm with a simple gain and offset correction method.
© 2016 Optical Society of AmericaFull Article | PDF Article
29 August 2016: A correction was made to the author affiliations.
OSA Recommended Articles
Junning Cui, Zhangqiang He, Jiubin Tan, and Tao Sun
Opt. Express 24(20) 23505-23518 (2016)
Peter Gregorčič, Tomaž Požar, and Janez Možina
Opt. Express 17(18) 16322-16331 (2009)
Pengcheng Hu, Jinghao Zhu, Xiaoyu Zhai, and JiuBin Tan
Opt. Express 23(7) 8399-8408 (2015)