A GAUGE FOR MEASUREMENTS OF THERMAL COEFFICIENT OF THE OPTICAL PATH IN LASER MATERIALS

Abstract

A gauge for measurements of thermal coefficient of the optical path, W, is developed. The measurements are based on the laser beam deviation method for medium with linear thermal gradient. The gauging is performed for spectral range of 0,4–1,1 μm in linearly polarized light with precision of 0,3×10-6 K-1. On the basis of measured W value, thermo-optic coefficient, dn/dT, can be determined.

Keywords

• thermo-optical properties
• laser materials