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Dual-wavelength laser polarimeter and its performance capabilities

Shopa Y., Shopa M., Ftomyn N.

Opto-Electronics Review

2017

Vol. 25, No. 1

6--9

A dual-wavelength optical polarimetric approach has been proposed as a means of elimination of the systematic errors and estimation of the optical anisotropy parameters for a single DKDP crystal. Our HAUP-related polarimeter uses two semiconductor lasers with the neighbouring wavelengths of 635 nm and 650 nm. Based on the temperature dependence analysis of small characteristic azimuths of light polarization with respect to the axis of the sample, we found the parameters of imperfections of polarization system. We acquired eigen waves ellipticities in a DKDP crystal and found perpendicular to the optic axis value of the optical rotatory power. Our results correlate positively with previously measured data for KDP crystals.

Optical activity of Ca3Ga2Ge4O14 crystals: experiment and calculus

Shopa Y, Ftomyn N

Optica Applicata

2013

Vol. 43, nr 2

s. 217--228

Using a highly accurate polarimetric method, we determine the gyration tensor component g11 for Ca3Ga2Ge4O14 (CGG) crystals. For this aim we employ a single-wavelength high-accuracy polarimeter and eliminate the main systematic errors of our polarimetric measurements. A calculation technique based on the polarizability theory for optical activity (OA) is applied to derive optical rotatory power (ORP) for the CGG. A comparison of the observed and calculated OA parameters confirms the validity of our theoretical calculations. Dispersions of both the ordinary and extraordinary refractive indices and the ORP are calculated.