Polarimetry data from article: Study of the optical rotatory of potassium titanyl phosphate using the advanced dual-wavelength polarimetric method
Description
This data is a supplement to the article "Study of the optical rotatory of potassium titanyl phosphate using the advanced dual-wavelength polarimetric method". The abstract is reproduced below. A dual-wavelength high-accuracy universal polarimeter was applied to the circular birefringence and optical activity measurement in potassium titanyl phosphate (KTP) nonlinear crystal. The experimental setup used two single-mode He-Ne lasers with close wavelengths of 594 and 633 nm as light sources. Measurement has been carried out for two crystal settings in directions of a 45-degree relative angle to the [100] and [010] crystallographic axes. Multiple light reflections inside the crystal sample were considered when processing the results of the polarimetric measurements. The results have been analysed using the optical transmission function for the polariser-sample-analyser system, and 2D intensity contour maps made it possible to determine the phase parameters, systematic errors, and eigenwaves ellipticity. It was found that the gyration tensor component of the KTP crystal is equal to g12 = 1.4 ⋅10−5 which in terms of optical rotatory power corresponds to the very small magnitude of the rotation value of 2.3 deg/mm.
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Steps to reproduce
According to formula (6), the counterclockwise angle of rotation of major axis of the HAUP map ellipse for 594 nm and 633 nm wavelengths are calculated. Based on the temperature dependence of the p_1 and p_3 coefficients ratio, the two temperature values can be found, for which according to relations (2) the ratio B/A=1. For these temperatures, the phase value in the interference factor φ_1,2=0 and π, respectively. For these temperatures, the phase value in the interference factor φ_1,2=0 and π, respectively. Assuming that the phase φ_1,2 increases linearly for a small temperature interval we applied the linear least squares method for 0° and 90° crystal sets. Thus, the following calculations for each temperature became possible: (i) normalization function S(Γ,φ) based on the relation (5); (ii) functions A(Γ,φ)=S(Γ,φ)/p_1 and B(Γ,φ)=S(Γ,φ)/p_3; (iii) true values of Γ_1,2 and the corresponding trigonometric functions, which depend on the phase difference. Further calculations described in the article are based on these data. All calculation procedures for 90° set are the same as in the case of 0° set.
Institutions
- Politechnika Gdanska