Abstract
The effect of uniaxial mechanical pressure along the main crystallophysical axes on the principal values of birefringence Δn i in TGS crystals doped with 5% D-serine is investigated. It is ascertained that the values of Δn i are rather sensitive to the action of uniaxial stresses. The temperature shift coefficients ∂T c /∂σm are determined for the phase-transition points. The temperature and spectral dependences of the combined piezo-optic constants π im 0 are calculated. The contribution of the secondary electro-optic effect to the changes in the birefringence and the piezo-optic constants of doped crystals is determined. It is found that the piezooptic constants π 23 0 and π 12 0 have the same values, which indicates a decrease in the anisotropy of the optical indicatrix of doped crystals under the action of uniaxial stress. The optical and deformation contributions to the relaxation effect of piezo-optical birefringence in doped TGS crystals are found.
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