Want-Gauthier Eric, Golub Ilya
Opt Lett. 2017 Mar 1;42(5):943-946. doi: 10.1364/OL.42.000943.
We demonstrate a novel method to measure circular birefringence (CB) and linear birefringence (LB) present simultaneously in the device under study. By using a π-shifted Sagnac interferometer, the scheme eliminates the dependence on incoming polarization and on the orientation angle of the linear birefringence. Moreover, due to different handedness symmetry/response of CB and LB to counter-propagating waves, the technique allows us to control the relative influence of the two birefringences leading to a requirement of only two measurements to determine both of them. Thus, comparing to Stokes polarimeters and other methods, our scheme has advantages when characterizing media containing both birefringences. Our findings are experimentally confirmed.
我们展示了一种新颖的方法，用于测量正在研究的器件中同时存在的圆双折射（CB）和线性双折射（LB）。通过使用π相移萨格纳克干涉仪，该方案消除了对入射偏振和线性双折射取向角的依赖。此外，由于CB和LB对反向传播波的不同手性对称性/响应，该技术使我们能够控制两种双折射的相对影响，从而仅需两次测量即可确定它们两者。因此，与斯托克斯偏振计和其他方法相比，我们的方案在表征同时包含两种双折射的介质时具有优势。我们的发现得到了实验证实。
