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Opt Lett. 2006 Nov 15;31(22):3279-81.

Stabilization of a channeled spectropolarimeter by self-calibration.

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  • 1Division of Applied Physics, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan.

Abstract

A novel method to stabilize a channeled spectropolarimeter is described. The fluctuating retardations of the high-order retarders used in the spectropolarimeter are calibrated in parallel to the measurement of the wavenumber-dependent state of polarization (SOP) of light. Both the calibration of the retarders and the measurement of the SOP can be made simultaneously using a single light to be measured, and hence the resultant wavenumber-dependent SOP is almost immune to fluctuation of the retardations. The effectiveness of this method is experimentally demonstrated with retardation fluctuations induced by a temperature change up to 40 degrees C.

PMID:
17072396
[PubMed]
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