Second harmonic generation in tunable TEA CO2 laser

Jinzhe Huang; Xiaoyong Hu; Deming Ren; Yanchen Qu; Fengmei M. Liu

doi:10.1117/12.466038

9 April 2003 Second harmonic generation in tunable TEA CO₂ laser

Jinzhe Huang, Xiaoyong Hu, Deming Ren, Yanchen Qu, Fengmei M. Liu

Proceedings Volume 4891, Optical Remote Sensing of the Atmosphere and Clouds III; (2003) https://doi.org/10.1117/12.466038
Event: Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2002, Hangzhou, China

Abstract

3~5um mid-infrared laser displaying good atmospheric transmitting properties is mostly used as laser source, in many applications such as remote sensing for air pollution determining. And it is usually obtainable in Second harmonic generation (SHG) in CO₂ laser. In the course of investigation, a homemade nonlinear optical crystal AgGaSe₂, of the size 7×8×12mm³, was used for SHG in tunable TEA CO₂ laser with different wavelengths. And, 12 coherent laser sources in 3~5μm from CO₂ spectrum region 10.6μm~9.2μm were obtained. In our results, phase-matching angles aqre in good accordance with the crystal's cutting. Theory calculating on conversion was made as well, to compare with experimental data which present changes of energy conversion under pump's rising. And in the interest of enhancing energy conversion by means of peaking pulse through cutting tail, a plasma shutter, argon charged in body under normal air pressure, was effectively arranged in experiment. As a result, about 50nS width peak pulse was generated, and up to 10% energy conversion (2mJ, 5.3μm) was achieved against 1% without shutter, both pumping in 10P(20) line.

Citation Download Citation

Jinzhe Huang, Xiaoyong Hu, Deming Ren, Yanchen Qu, and Fengmei M. Liu "Second harmonic generation in tunable TEA CO₂ laser", Proc. SPIE 4891, Optical Remote Sensing of the Atmosphere and Clouds III, (9 April 2003); https://doi.org/10.1117/12.466038

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