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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper CE_P_21

Precise Optical Absorption Measurement of Nonlinear-Optical Crystals

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Abstract

Laser calorimetry is conventional method applied for optical absorption measurement in crystals. It is based on finding correspondence between solution of nonstationary heat conduction equation and temperature kinetics of the crystal measured during its heating by laser radiation [1]. To the present day crystal temperature is measured indirectly using external detectors that ought to be in good thermal contact with sample under test and also should not perturb natural cooling of the crystal. The main problem is that thus measured temperature cannot be identified with true temperature of the crystal. Due to the strong temperature gradient in air near crystal surface such detectors measure temperature in heat flow rather than in heat equilibrium condition.

© 2015 IEEE

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