Optical-to-THz conversion efficiency analysis and comparison of ZnTe, DAST, LiNbO3 crystals

Dehua Li; Xiaodong Qi; Zhou Wei; Jin Tao; Shenggang Liu

doi:10.1117/12.821583

3 June 2009 Optical-to-THz conversion efficiency analysis and comparison of ZnTe, DAST, LiNbO₃ crystals

Dehua Li, Xiaodong Qi, Zhou Wei, Jin Tao, Shenggang Liu

Proceedings Volume 7277, Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology; 727715 (2009) https://doi.org/10.1117/12.821583
Event: Photonics and Optoelectronics Meetings, 2008, Wuhan, China

Abstract

A theoretical analysis of optical-to-THz conversion efficiency via optical rectification in nonlinear crystal and the conversion efficiency comparison of ZnTe, DAST, LiNbO₃ is presented; The optical-to-THz conversion efficiencies are mainly affected by following several factors; Pulse durations mostly affect the conversion efficiency: Optical-to-THz conversion efficiency approaches to a maximum when crystal length is equal to the optimal length Lc, for the periodically-inverted crystals, conversion efficiency is almost proportional to the crystal length when absorption of medium is negligible. Taking account of the absorption of crystals, effective length of crystal is L_eff=0.63/α, the conversion efficiency approaches to a constant eventually when the crystal length is increased for crystal DAST and LiNbO₃. But the optical-to-THz wave conversion efficiency of ZnTe will increase rapidly with increase of crystal length.

Citation Download Citation

Dehua Li, Xiaodong Qi, Zhou Wei, Jin Tao, and Shenggang Liu "Optical-to-THz conversion efficiency analysis and comparison of ZnTe, DAST, LiNbO₃ crystals", Proc. SPIE 7277, Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology, 727715 (3 June 2009); https://doi.org/10.1117/12.821583

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