Highly efficient terahertz generation from periodically-poled RbTiOPO<sub>4</sub>

Zhong-yang Li; Meng-tao Wang; Si-lei Wang; De-gang Xu; Jian-quan Yao

doi:10.1007/s11801-017-6253-0

Optoelectronics Letters ›› , Vol. 13 ›› Issue (2) : 127-130. DOI: 10.1007/s11801-017-6253-0

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Highly efficient terahertz generation from periodically-poled RbTiOPO₄

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Abstract

Terahertz (THz) generation by periodically-poled RbTiOPO₄ (PPRTP) with a quasi-phase-matching scheme based on cascaded difference frequency generation (DFG) processes is theoretically analyzed. The cascaded Stokes and anti-Stokes interaction processes are investigated from coupled wave equations. The THz intensities and quantum conversion efficiency are calculated. Compared with that of non-cascaded DFG processes, the THz intensity in 7-order cascaded DFG processes is increased to 2.95 times. The quantum conversion efficiency of 149.9% in cascaded processes can be realized, which exceeds the Manley-Rowe limit.

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Zhong-yang Li, Meng-tao Wang, Si-lei Wang, De-gang Xu, Jian-quan Yao. Highly efficient terahertz generation from periodically-poled RbTiOPO₄. Optoelectronics Letters, , 13(2): 127‒130 https://doi.org/10.1007/s11801-017-6253-0

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This work has been supported by the National Natural Science Foundation of China (Nos.61201101, 61601183 and 61205003), the Young Backbone Teachers in University of Henan Province (No.2014GGJS-065), the Foundation and Advanced Technology Research Program of Henan Province (No.162300410269), and the Program for Innovative Research Team (in Science and Technology) in University of Henan Province (No.16IRTSTHN017).