Abstract：According to the demand of measurement uncertainty evaluation for laser induced damage threshold tested by ISO 21254 method, the main uncertainty influencing factors are systematically studied. The energy density and the damage probability measurement uncertainty are analyzed by GUI method. The measurement uncertainty induced by linear fitting method is investigated by the Monte Carlo method. The influences on the fitting result is also compared by different residual error models in the procedure of the damage probability and energy density linear fitting. The analysis shows that the least square residual error model considering both damage probability error and energy density error has the best error resistance performance during the linear fitting process and it can effectively reduce the error influence on the damage threshold induced by the damage probability error and the energy density error. The same damage testing experiment data is treated by the ISO 21254 method and the Monte Carlo method. The result indicates that the threshold uncertainty is smaller and the threshold value is bigger deduced by the ISO 21254 method. Once using the ISO 21524 method, the laser induced damage threshold would be overestimated.
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2022, Vol. 43 
