Generation of tunable coherent nanosecond 8-12&#956;m mid-infrared pulses based on difference frequency generation in GaSe and ZnGeP2

Kai Zhong; Jianquan Yao; Jiansong Li; Degang Xu; Peng Wang

doi:10.1117/12.868562

4 November 2010 Generation of tunable coherent nanosecond 8-12μm mid-infrared pulses based on difference frequency generation in GaSe and ZnGeP₂

Kai Zhong, Jianquan Yao, Jiansong Li, Degang Xu, Peng Wang

Author Affiliations +

Proceedings Volume 7846, Quantum and Nonlinear Optics; 78460S (2010) https://doi.org/10.1117/12.868562
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

Based on the theoretical analysis on the phase-matching relations, effective nonlinear coefficients, walk-off and acceptance angles, the generation of tunable and coherent nanosecond mid-infrared radiation covering the 8-12μm range is realized by use of difference frequency generation (DFG) in a GaSe and a ZnGeP2 (ZGP) crystal. Using an 8-mm-long GaSe crystal, we achieve the mid-infrared generation that is continuously tunable from 8.28μm to 18.365μm. The maximum pulse energy is 31μJ at 8.76μm, corresponding to the conversion efficiency of 0.9% and the maximum midinfrared peak power of about 7kW. In the case of using an 8-mm-long ZGP crystal, the tuning range is from 7.2μm to 12.2μm. The maximum pulse energy is about 10μJ at 9.22μm, corresponding to the conversion efficiency of 0.45% and the peak power of 2.2kW.

Citation Download Citation

Kai Zhong, Jianquan Yao, Jiansong Li, Degang Xu, and Peng Wang "Generation of tunable coherent nanosecond 8-12μm mid-infrared pulses based on difference frequency generation in GaSe and ZnGeP₂", Proc. SPIE 7846, Quantum and Nonlinear Optics, 78460S (4 November 2010); https://doi.org/10.1117/12.868562

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