Frequency doubling of picosecond CO/sub 2/ laser radiation with ZnGeP/sub 2/ crystal

5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. Pub Date : 2003-11-17 DOI:10.1109/LFNM.2003.1246110

A. Gribenyukov, V. V. Korotkova, N. V. Pletnyev, Yu. A. Shakir, V. Sorochenko, A. Trofimov

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Abstract

Summary form only given. For mid IR region ZnGeP/sub 2/ crystals have excellent potential for application in nonlinear optics due to unique combination of physical properties. In 1987 second harmonics generation (SHG) efficiency of 49% was realized with this crystal pumped by 2-ns pulses of CO/sub 2/-laser with intensity /spl sim/ 1GW/cm/sup 2/. In the present work SHG was investigated with the ZnGeP/sub 2/ crystals pumped by CO/sub 2/-laser pulses with much higher radiation intensities. To prevent the crystal surface optical damage we applied the significantly shorten laser pulse duration as compared with known data. In our experiments CO/sub 2/-laser system "Picasso-2" was used generating the train of pulses with duration 20 - 100 ps and total energy up to 15 J. The system provided laser intensity up to 100 GW/cm/sub 2/ at the crystal samples surface /spl sim/15 /spl times/15 mm/sup 2/. The work was supported by the Russian Fund for Basic Research (grant #03-02-16094).

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用ZnGeP/sub 2/晶体实现皮秒CO/sub 2/激光辐射倍频

只提供摘要形式。在中红外区域，ZnGeP/ sub2 /晶体由于其独特的物理性质组合，在非线性光学中具有良好的应用潜力。1987年，用强度为/spl / sim/ 1GW/cm/sup /的2-ns CO/sub - 2激光脉冲泵浦该晶体，实现了二次谐波产生(SHG)效率49%。本文用CO/sub 2/-激光脉冲泵浦的ZnGeP/sub 2/晶体研究了SHG。为了防止晶体表面的光学损伤，我们使用了比已知数据明显缩短的激光脉冲持续时间。在我们的实验中，使用CO/sub -2激光系统“毕加索-2”产生持续时间为20 - 100 ps，总能量高达15 j的脉冲序列，该系统在晶体样品表面提供的激光强度高达100 GW/cm/sub -2 / /spl sim/15 /spl次/15 mm/sup -2 /。这项工作得到了俄罗斯基础研究基金(资助号:03-02-16094)的支持。

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5th International Workshop on Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003.

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