Tunable high-pulse-energy mid-infrared laser source based on optical parametric amplification in ZnGeP(2)

M. W. Haakestad; G. Arisholm; E. Lippert; S. Nicolas; G. Rustad; K. Stenersen

doi:10.1117/12.800079

2 October 2008 Tunable high-pulse-energy mid-infrared laser source based on optical parametric amplification in ZnGeP₂

M. W. Haakestad, G. Arisholm, E. Lippert, S. Nicolas, G. Rustad, K. Stenersen

Proceedings Volume 7115, Technologies for Optical Countermeasures V; 71150Q (2008) https://doi.org/10.1117/12.800079
Event: SPIE Security + Defence, 2008, Cardiff, Wales, United Kingdom

Abstract

Nonlinear optical conversion of high-energy 1.064 μm pulses from a Q-switched Nd:YAG laser to the mid-infrared is demonstrated. The experimental setup is based on a two-stage master-oscillator/power-amplifier (MOPA) design with a KTiOPO₄ based MOPA in the first stage and a KTiOAsO₄/ZnGeP₂ based MOPA in the second stage. The setup can be tuned to provide output at wavelengths within the transparency range of ZnGeP₂. We obtain more than 8 mJ at 8 μm, and up to 33 mJ in the 3-5 μm wavelength region. The measured beam quality factors are in the range M² =2-4 for both wavelength regions.

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M. W. Haakestad, G. Arisholm, E. Lippert, S. Nicolas, G. Rustad, and K. Stenersen "Tunable high-pulse-energy mid-infrared laser source based on optical parametric amplification in ZnGeP₂", Proc. SPIE 7115, Technologies for Optical Countermeasures V, 71150Q (2 October 2008); https://doi.org/10.1117/12.800079

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