7 January 2015 High sensitive method for optical birefringence measurement
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Proceedings Volume 9442, Optics and Measurement Conference 2014; 94420O (2015) https://doi.org/10.1117/12.2086877
Event: Optics and Measurement Conference 2014, 2014, Liberec, Czech Republic
Abstract
A sensitive method for optical birefringence measurement is presented. To optimize the signal over the noise ratio, the polarization of the laser beam is modulated exceptionally with a high frequency electro-optical modulator. The specially developed optical apparatus exhibits high sensitivity and accuracy, which were checked by measuring the Cotton-Mouton effect in nitrogen as a function of the pressure. It is able to measure the retardance down to 2x10-4 rad. This apparatus will be used with the locked optical cavity. The optical cavity will serve as an optical path multiplier for increasing the sensitivity. This proposed set-up will be able to measure the Cotton-Mouton effect in helium, where the birefringence effect is Δn ≈ 2.4x10-16.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Kunc, M. Šulc, "High sensitive method for optical birefringence measurement", Proc. SPIE 9442, Optics and Measurement Conference 2014, 94420O (7 January 2015); doi: 10.1117/12.2086877; https://doi.org/10.1117/12.2086877
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