Precision polarimetry with real-time mitigation of optical-window birefringence

Details Precision polarimetry with real-time mitigation of optical-window birefringence Precision polarimetry with real-time mitigation of optical-window birefringence

2007-08-16

arxiv.org/abs/0708.2110v4

Rev. Sci. Instrum. 79, 013108 (2008)

Physics

Optics

Scientific paper

10.1063/1.2835902

Optical-window birefringence is frequently a major obstacle in experiments measuring changes in the polarization state of light traversing a sample under investigation. It can contribute a signal indistinguishable from that due to the sample and complicate the analysis. Here, we explore a method to measure and compensate for the birefringence of an optical window using the reflection from the last optical surface before the sample. We demonstrate that this arrangement can cancel out false signals due to the optical-window birefringence-induced ellipticity drift to about 1%, for the values of total ellipticity less than 0.25 rad.

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