Abstract
When high-power lasers are used, the absorption in optical components can lead to distortion and depolarization of a beam, or even damage of components. Photothermal deflection and interferometric calorimetry permit the quantification of the thermal absorption A T of the laser flux in transparent materials by the measurement of the deflection or distortion of a probe beam caused by the propagation of a pump laser in the material. The purpose of this Letter is to provide a method to measure the absorption of a highly transparent material assisted by a thermal modeling.
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