Study on conversion efficiency of optical-to-terahertz in optical rectification

Qinglong Meng; Rong Ye; Bing Zeng; Zheqiang Zhong; Bin Zhang

doi:10.1117/12.2071302

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3 February 2015 Study on conversion efficiency of optical-to-terahertz in optical rectification

Qinglong Meng, Rong Ye, Bing Zeng, Zheqiang Zhong, Bin Zhang

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Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 92554Q (2015) https://doi.org/10.1117/12.2071302
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China

Abstract

Optical rectification of ultra-short laser pulses is an attractive technique for efficient generation of terahertz pulses. An analytical expression of the optical-to-terahertz conversion efficiency in optical rectification by the use of the method of tilted-pulse-front pumping has been derived and used to simulate the maximum optical-to-terahertz conversion efficiency. The variations of the conversion efficiency of optical-to-terahertz with the length of crystal, the intensity and the pulse duration of the pumping ultra-short laser have been investigated, both in numerical and analytical solutions. In addition, the absorption of terahertz wave in LiNbO₃ has also been taken into account. The results show that, the optical-to-terahertz conversion efficiency increases with the intensity of pump pulse and the length of crystal, whereas decreases with the increasing of the pulse duration for the case of the relatively large pulses duration.

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Qinglong Meng, Rong Ye, Bing Zeng, Zheqiang Zhong, and Bin Zhang "Study on conversion efficiency of optical-to-terahertz in optical rectification", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92554Q (3 February 2015); https://doi.org/10.1117/12.2071302

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