27 May 1996 CW CO2 laser damage in optical components: thermal modeling and surface characterization
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This paper reports progress towards characterizing the laser induced damage threshold (LIDT) for zinc selenide and copper components in CW/C02 laser optical systems. The work has been undertaken by industrial partners and research centres supported by the CRAFT initiative of the European Commission. Specimen surfaces have been characterized by a wide range of experimental methods, including absorption calorimetry. Thermal modelling on the basis of these observations indicates that the temperature rise in irradiated components is dominated by surface absorption, and that the maximum temperature rise is proportional to the ratio of the total power P to focal spot size d rather than to the areal power density. A CW/C02 laser damage facility has been constructed by one of the industrial partners. Preliminary. experiments have determined P/d values at the LIDT an order of magnitude less than those predicted by the measured level of surface absorption.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rune Holm, Rune Holm, Keith E. Puttick, Keith E. Puttick, Detlev Ristau, Detlev Ristau, Urs Natzschka, Urs Natzschka, George Kiriakidis, George Kiriakidis, Nirmal Garawal, Nirmal Garawal, Eddie Judd, Eddie Judd, David Holland, David Holland, David Greening, David Greening, Nick Ellis, Nick Ellis, Mark Wilkinson, Mark Wilkinson, Miguel Garcia Pamies, Miguel Garcia Pamies, Celestino Sanviti, Celestino Sanviti, Irene Cantoni, Irene Cantoni, "CW CO2 laser damage in optical components: thermal modeling and surface characterization", Proc. SPIE 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995, (27 May 1996); doi: 10.1117/12.240413; https://doi.org/10.1117/12.240413

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