Power and energy measurement of laser pulse radiation with three profile bolometric gratings

Three bolometric gratings have to be used for measurements of the polarization state of the laser radiation. It is possible to eliminate systematic errors of such measurements caused by the nonlinearity of the bolometer transformation characteristic if beforehand eliminate the similar errors from grating signals. This work concerns the development of measuring method of energy parameters of the laser radiation, the coefficient of non-uniformity of the radiation intensity distribution, and the polarize coefficients of bolometer interaction with the radiation, and also technique of elimination of systematic errors at the expense of the bolometer nonlinearity from the obtained results. The aim of the work achieves with the usage of known cubic dependence of the bolometer transformation coefficient on the incident on the bolometer linear radiation intensity, obtained dependencies of coefficient of non-uniformity of radiation intensity distribution across entire gratings aperture, and polarize coefficients of interaction. Energy parameters of radiation are solved with cubic measuring equation with step-by-step correction of the coefficient of non-uniformity distribution; the polarize coefficients of the interaction; and incident linear radiation intensity. The analysis of the obtained measurement results are carried out.