ESPI-characterization of online deformations of CVD-diamond output coupler windows in high-power IR lasers

Ben Depuydt; Pierre Michel Boone; Piet Union; Peter F. Muys

doi:10.1117/12.316630

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14 July 1998 ESPI-characterization of online deformations of CVD-diamond output coupler windows in high-power IR lasers

Ben Depuydt, Pierre Michel Boone, Piet Union, Peter F. Muys

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Proceedings Volume 3423, Second GR-I International Conference on New Laser Technologies and Applications; (1998) https://doi.org/10.1117/12.316630
Event: Second GR-I International Conference on New Laser Technologies and Applications, 1997, Olympia, Greece

Abstract

Synthetic diamond, deposited by Chemical Vapour Deposition (CVD), is becoming an interesting alternative for ZnSe as a window material for high power CO lasers. Although the infrared absorption of CVD-dianiond is higher than of ZnSe, this drawback is largely overruled by its better thermal conductivity, leading to smaller temperature gradients in the window and hence a less distorted laser beam. Electronic Speckle Pattern Interferometry (ESPI) is applied to study the on-line deformation of ZnSe and CVD-diamond anti-reflective coated output coupler windows exposed to a high power CO laser beam. It is seen that a ZnSe window already starts deforming at moderate beam power (100 W), while a diamond window does not deform considerably up to a beam power of 700 W.

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Ben Depuydt, Pierre Michel Boone, Piet Union, and Peter F. Muys "ESPI-characterization of online deformations of CVD-diamond output coupler windows in high-power IR lasers", Proc. SPIE 3423, Second GR-I International Conference on New Laser Technologies and Applications, (14 July 1998); https://doi.org/10.1117/12.316630

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