14 July 1998 ESPI-characterization of online deformations of CVD-diamond output coupler windows in high-power IR lasers
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Proceedings Volume 3423, Second GR-I International Conference on New Laser Technologies and Applications; (1998); doi: 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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ben Depuydt, Pierre Michel Boone, Piet Union, 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); doi: 10.1117/12.316630; https://doi.org/10.1117/12.316630
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KEYWORDS
High power lasers

Output couplers

Diamond

Speckle pattern

Chemical vapor deposition

Adaptive optics

Absorption

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