FIELD: optics.
SUBSTANCE: method relates to optics, in particular to calorimetric methods for measuring small optical absorption coefficients of crystals. Method of measuring small optical absorption coefficients of nonlinear optical crystals possessing piezoelectric properties, is based on measuring the initial portion of the kinetics of the temperature-calibrated piezoelectric resonance parameter under the action of laser radiation. Calibration is performed under conditions of uniform heating of the crystal. Optical absorption coefficient is determined from the kinetics of crystal heating by laser radiation, taking into account the replacement of the thermodynamic temperature of the crystal by an equivalent temperature. More over it is used only the initial linear portion of the kinetics of the equivalent temperature determined from the kinetics of one of the resonance parameters.
EFFECT: technical result is in reducing the measurement time of the optical absorption coefficient by several orders of magnitude, which leads to an accuracy in determining the optical absorption coefficients; in its turn, the minimum value and accuracy depend on the quality factor and the sensitivity to the temperature of the corresponding parameters of the resonances used.
3 cl, 7 dwg
