Compact high-power/high-energy 2 μm and mid-infrared laser sources for OCM

C. Kieleck; A. Hildenbrand; M. Schellhorn; G. Stoeppler; M. Eichhorn

doi:10.1117/12.2031662

15 October 2013 Compact high-power/high-energy 2 μm and mid-infrared laser sources for OCM

C. Kieleck, A. Hildenbrand, M. Schellhorn, G. Stoeppler, M. Eichhorn

Proceedings Volume 8898, Technologies for Optical Countermeasures X; and High-Power Lasers 2013: Technology and Systems; 889809 (2013) https://doi.org/10.1117/12.2031662
Event: SPIE Security + Defence, 2013, Dresden, Germany

Abstract

The paper describes two laser prototypes devoted to the jamming or the damaging of heat-seeking missiles for use in field trials. The semi-ruggedized compact jamming prototype is based either on an OP-GaAs or a ZnGeP₂ (ZGP) OPO directly pumped by a 2.09 μm Q-switched Ho³⁺:YAG laser with up to 20 W of average power around 2.1 μm and an M² of less than 1.1. For jamming in band II, up to 3.5 W of average power were obtained and repetition rates from 20 kHz to 100 kHz were achieved. For 3.5 W of averaged output power, the M² of the signal and idler beams were estimated to be less than 1.2. The destruction laser consists of a Ho³⁺:LLF MOPA laser system which is used to pump a ZGP OPO. The maximum pulse energy of the Ho³⁺:LLF MOPA was 82 mJ at a repetition rate of 100 Hz. The pump beam quality was measured to M²x = 1.01 and M²y = 1.03 at a wavelength of 2053 nm. The total 3-5 μm energy obtained for destruction was 23.4 mJ, corresponding to an optical-to-optical conversion efficiency of 51 %. The M² values of the signal were M²x = 1.81 and M²y = 1.98. The M² values of the corresponding idler beam were M²x = 1.91 and M²y = 1.94, respectively. ISL is also currently working on new laser sources and non linear conversion setups for proposing new versions that should be more compact, more efficient and more integrable.

Citation Download Citation

C. Kieleck, A. Hildenbrand, M. Schellhorn, G. Stoeppler, and M. Eichhorn "Compact high-power/high-energy 2 μm and mid-infrared laser sources for OCM", Proc. SPIE 8898, Technologies for Optical Countermeasures X; and High-Power Lasers 2013: Technology and Systems, 889809 (15 October 2013); https://doi.org/10.1117/12.2031662

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