ABSTRACT

Increasing of laser radiation power and improvement of its spatial-time parameters remain one of the priority trends in upgrading quantum-optics devices. At the same time the problem of high-precision measurements of these parameters in the actual-use environment of lasers is important. The specific features of registration process appear at the measurements of high-energy laser pulse characteristics. They are caused by non-linearity behavior of interaction of powerful laser radiation with receiver. The objective of this paper is in determining of transfer function of the thin-wire bolometer of laser pulse energy on wavelength 1.06 µ with regard to non-linearity and non-uniformity of intensity distribution along the receiver. The heat-balance equation has been solved with regard to derived temperature dependencies of basic physical parameters of the bolometer. The dependencies of effective temperature of bolometer heating on the effective specific energy of incident laser radiation have been determined. The inverse function has been approximated with a polynomial of the second order. This function is a transfer one. Numerical values of coefficients of a cubic equation of measurements have been determined with their relative root-mean-square deviations. It allows us to carry out absolute measurements of energy parameters of laser radiation on wavelength 1.06 µ with thin-wire bolometer. Thus, the method of absolute calibration of thin-wire bolometer of laser pulse energy on wavelength 1.06 µ is substantiated.