Investigation on Terahertz Generation by GaP Ridge Waveguide Based on Cascaded Difference Frequency Generation
- Resource Type
- Academic Journal
- Authors
- Kai Zhong; Pibin Bing; Sheng Yuan; Degang Xu; Jianquan Yao; Zhongyang Li
- Source
- Current Optics and Photonics. 2016-02 20(1):169-173
- Subject
- Cascaded optical processes
Difference frequency generation
Terahertz wave
- Language
- Korean
- ISSN
- 2508-7266
2508-7274
Terahertz (THz) generation by a GaP ridge waveguide with a collinear modal phase-matching schemebased on cascaded difference frequency generation (DFG) processes is theoretically analyzed. The cascadedStokes interaction processes and the cascaded anti-Stokes interaction processes are investigated fromcoupled wave equations. THz intensities and quantum conversion efficiency are calculated. Compared withnon-cascaded DFG processes, THz intensities from 11-order cascaded DFG processes are increased to 5.48. The quantum conversion efficiency of 177.9% in cascaded processes can be realized, exceeding theManley-Rowe limit.