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Proceedings Paper

CW/CO2 laser damage in optical components: thermal modeling and surface characterization
Author(s): Rune Holm; Keith E. Puttick; Detlev Ristau; Urs Natzschka; George Kiriakidis; Nirmal Garawal; Eddie Judd; David Holland; David Greening; Nick Ellis; Mark Wilkinson; Miguel Garcia Pamies; Celestino Sanviti; Irene Cantoni
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Paper Abstract

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.

Paper Details

Date Published: 27 May 1996
PDF: 1 pages
Proc. SPIE 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995, (27 May 1996); doi: 10.1117/12.240413
Show Author Affiliations
Rune Holm, Univ. of Surrey (United Kingdom)
Keith E. Puttick, Univ. of Surrey (United Kingdom)
Detlev Ristau, Laser Zentrum Hannover (Germany)
Urs Natzschka, Laser Zentrum Hannover (Germany)
George Kiriakidis, FORTH (Greece)
Nirmal Garawal, FORTH (Greece)
Eddie Judd, Davin Optical Ltd. (United Kingdom)
David Holland, Davin Optical Ltd. (United Kingdom)
David Greening, V&S Scientific Ltd. (United Kingdom)
Nick Ellis, V&S Scientific Ltd. (United Kingdom)
Mark Wilkinson, Laser Beam Products (United Kingdom)
Miguel Garcia Pamies, Laser Quanta SA (Spain)
Celestino Sanviti, Tecnogamma s.n.c. (Italy)
Irene Cantoni, Tecnogamma s.n.c. (Italy)

Published in SPIE Proceedings Vol. 2714:
27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995
Harold E. Bennett; Arthur H. Guenther; Mark R. Kozlowski; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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