Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Terahertz Generation Based on Cascaded Difference Frequency Generation with Periodically-poled KTiOPO4

  • Li, Zhongyang (North China University of Water Resources and Electric Power) ;
  • Wang, Silei (North China University of Water Resources and Electric Power) ;
  • Wang, Mengtao (North China University of Water Resources and Electric Power) ;
  • Wang, Weishu (North China University of Water Resources and Electric Power)
  • Received : 2016.05.31
  • Accepted : 2017.03.08
  • Published : 2017.04.25
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Abstract

Terahertz (THz) generation by periodically-poled $KTiOPO_4$ (PPKTP) with a quasi-phase-matching scheme based on cascaded difference frequency generation (DFG) processes is theoretically analyzed. The cascaded Stokes interaction processes and the cascaded anti-Stokes interaction processes are investigated from coupled wave equations. THz intensities and quantum conversion efficiency are calculated. Compared with non-cascaded DFG processes, THz intensities from 10-order cascaded DFG processes are increased to 5.53. The quantum conversion efficiency of 479.4% in cascaded processes, which exceeds the Manley-Rowe limit, can be realized.

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References

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