Thermo-optical and dielectric constants of laser dye solvents

Abstract

The present work is devoted to the experimental measurements and calculations of thermo-optical and dielectric constants of four commonly used dielectric polar and nonpolar laser dye solvents; toluene, chloroform, carbon disulphide, and benzene. Using a modified high precision laser Mach–Zehnder interferometric technique the refractive index n and its thermal coefficient dn/dT were measured at two different laser wavelengths (514.5 and 632.8 nm). The measured experimental data of n and dn/dT were used in determining about 16 important physical constants and related parameters. On the other hand, the density and molar refraction as a function of temperature for the four solvents are calculated.