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Proceedings Paper

Large-spot COIL irradiation of Ge samples
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Paper Abstract

The large-spot out-of-band irradiation of Ge wafers and subsequent evaluation is discussed in this paper. The wafers were irradiated with a high-power, cw COIL system, operating at a wavelength of 1.315 μm. Damaging fluence values on the order of 1 kJ/cm2 were found for irradiation periods of several seconds. Thermal simulations were consistent with experimental findings. The damage morphology showed melt and microcrystallites. For sample evaluation, a compact modulation transfer function (MTF) test bench has been developed.

Paper Details

Date Published: 30 May 2003
PDF: 6 pages
Proc. SPIE 4932, Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization, (30 May 2003); doi: 10.1117/12.472054
Show Author Affiliations
Wolfgang Riede, DLR (Germany)
Karin M. Gruenewald, DLR (Germany)


Published in SPIE Proceedings Vol. 4932:
Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization
Gregory J. Exarhos; Arthur H. Guenther; Norbert Kaiser; Keith L. Lewis; M. J. Soileau; Christopher J. Stolz; Adolf Giesen; Horst Weber, Editor(s)

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