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Proceedings Paper

Optical-to-THz conversion efficiency analysis and comparison of ZnTe, DAST, LiNbO3 crystals
Author(s): Dehua Li; Xiaodong Qi; Zhou Wei; Jin Tao; Shenggang Liu
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Paper 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 Leff=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.

Paper Details

Date Published: 3 June 2009
PDF: 10 pages
Proc. SPIE 7277, Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology, 727715 (3 June 2009); doi: 10.1117/12.821583
Show Author Affiliations
Dehua Li, Shandong Univ. of Science and Technology (China)
Xiaodong Qi, Changchun Institute of Optics (China)
Zhou Wei, Shandong Univ. of Science and Technology (China)
Jin Tao, Shandong Univ. of Science and Technology (China)
Shenggang Liu, Univ. of Electronics Science (China)


Published in SPIE Proceedings Vol. 7277:
Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology
Jianquan Yao; Shenggang Liu; Xi-Cheng Zhang, Editor(s)

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