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Highly efficient terahertz generation from periodically-poled RbTiOPO4 |
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| Authors: | LI Zhong-yang WANG Meng-tao WANG Si-lei XU De-gang and YAO Jian-quan |
| Affiliation: | College of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China,College of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China,College of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China,Institute of Laser and Opto-electronics, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China and Institute of Laser and Opto-electronics, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China |
| 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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