Theoretical study on the generation of THz sub-comb via surface-emitted optical rectification of ultra-short pulse in periodically poled lithium niobate

Pengxiang Liu; Degang Xu; Jianquan Yao

doi:10.1117/12.868599

4 November 2010 Theoretical study on the generation of THz sub-comb via surface-emitted optical rectification of ultra-short pulse in periodically poled lithium niobate

Pengxiang Liu, Degang Xu, Jianquan Yao

Author Affiliations +

Proceedings Volume 7854, Infrared, Millimeter Wave, and Terahertz Technologies; 78543E (2010) https://doi.org/10.1117/12.868599
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

In this paper, we proposed a method for THz sub-comb generation based on optical rectification. The result of our calculation indicated that THz pulse train, generated by surface-emitted optical rectification (OR) of femtosecond (fs) laser pulse in a periodically poled lithium niobate (PPLN), has a comb-like spectrum. The theoretical analysis was based on radiating antenna model. The characteristic of this THz sub-comb was analyzed both in frequency and time domain. The mechanism of this phenomenon was explained both by spectral interference between early and late pulses and by high-order quasi phase matching. THz sub-comb generated by this method can cover a large bandwidth and have a wide free spectral range.

Citation Download Citation

Pengxiang Liu, Degang Xu, and Jianquan Yao "Theoretical study on the generation of THz sub-comb via surface-emitted optical rectification of ultra-short pulse in periodically poled lithium niobate", Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78543E (4 November 2010); https://doi.org/10.1117/12.868599

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