METHOD AND DEVICE FOR ESTIMATING LASER DAMAGE RESISTANCE OF OPTICAL MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method and device for measuring laser damage resistance that can evaluate laser damage resistance nondestructively with high accuracy even when an optical material generates fluorescence by irradiation of laser beams.;SOLUTION: The method for estimating laser damage resistance of the optical material includes a preliminary measuring step including irradiating the optical material with laser beams of first wavelength to observe fluorescence, a measuring step of changing irradiation intensity while causing two-photon absorption in a measuring region which is a part of the optical material, to measure the change of transmittance to the irradiation intensity in the measuring region, and a first estimating step of estimating laser damage resistance in the first wavelength, referring to correlative data of laser damage resistance and the change of transmittance to the irradiation intensity when associated with fluorescence obtained beforehand, based on the change of transmittance to the irradiation intensity.;COPYRIGHT: (C)2009,JPO&INPIT