13 October 2005 Laser-induced damage behaviour of different kind of germanium
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An original compact test method of studying the influence of a modified Nd:YAG laser beam irradiation at the unusual wavelength of λ = 1.3 μm on IR-Ge-windows is investigated: optical parameters such as transmission loss, surface temperature during the laser irradiation, morphological deformation, and damage thresholds are measured in real time and compared with theoretical simulations. To study the thermal-mechanical relationship of the laser-matter interaction, an original pyrometer array is developed for the temperature-profile measurement and an original deformation experimental set-up, including a "line generator", is introduced. The damage behaviour of germanium at the wavelength of λ = 1.3 μm is also presented in this paper.
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K. Diener, K. Diener, L. Gernandt, L. Gernandt, J.-P. Moeglin, J.-P. Moeglin, P. Ambs, P. Ambs, } "Laser-induced damage behaviour of different kind of germanium", Proc. SPIE 5989, Technologies for Optical Countermeasures II; Femtosecond Phenomena II; and Passive Millimetre-Wave and Terahertz Imaging II, 59890G (13 October 2005); doi: 10.1117/12.628966; https://doi.org/10.1117/12.628966

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