High-efficiency terahertz generation combined with cavity phase matching and quasi-phase matching
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High-efficiency terahertz generation by difference frequency generation (DFG) combined with cavity phase matching (CPM) and quasi-phase matching (QPM) is predicted in this paper. Numerical simulations show that the power conversion efficiency can reach a maximum value of 1.63%, which corresponds to a photon conversion efficiency of 66%. The efficiency is increased by ~ 102 times when compared with the DFG based on CPM or QPM. This phase matching method is expected to become a substitute for a single CPM or QPM.
KeywordsDifference frequency generation Cavity phase matching Quasi-phase matching Terahertz generation
The research was supported by the National Natural Science Foundation of China (NSFC, No. 11664017) and Science and Technology Project funded by Provincial Department of Education (No. GJJ160305).
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