Dispersion of the Elasto-Optic Constants of Potassium Halides
The variation of the refractive indices of potassium halides with pressure to 14 kbars have been determined by an interferometric method. In every case the refractive index was found to increase with pressure with a pronounced non-linearity. However, the same data exhibit perfect linear relationship with strain when the latter is evaluated using the non-linear theory of elasticity. Combining these results with the data using uniaxial pressure measurements, the individual elasto-optic constants have been determined. The observed dispersion of the elasto-optic coefficients in the spectral region 366 – 589 nm, is attributed mainly to the electronic contribution to the elasto-optic effect.
KeywordsVolume Strain Isothermal Pressure High Power Laser System Potassium Halide Perfect Linear Relationship
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