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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 31, Iss. 15 — Aug. 1, 2013
  • pp: 2508–2514

Coupled-Mode Theory for Cherenkov-Type Guided-Wave Terahertz Generation Via Cascaded Difference Frequency Generation

Pengxiang Liu, Degang Xu, Hong Yu, Hao Zhang, Zhongxiao Li, Kai Zhong, Yuye Wang, and Jianquan Yao

Journal of Lightwave Technology, Vol. 31, Issue 15, pp. 2508-2514 (2013)


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Abstract

A scheme for monochromatic terahertz (THz) generation via cascading enhanced Cherenkov-type difference frequency generation (DFG) in a sandwich-like waveguide is proposed. The novel scheme has the potential to overcome the quantum-defect limit and to provide an efficient output coupling. This process is elucidated by developing a coupled-mode theory and taking into account the pump depletion, waveguide mode properties, and THz output coupling. The effect of cascading enhancement is analyzed by comparing with non-cascaded DFG situation. It is predicted that THz power can be boosted by nearly 8-fold with a 400 MW/cm2 pump in a 40-mm-long Si-LiNbO3-Si waveguide.

© 2013 IEEE

Citation
Pengxiang Liu, Degang Xu, Hong Yu, Hao Zhang, Zhongxiao Li, Kai Zhong, Yuye Wang, and Jianquan Yao, "Coupled-Mode Theory for Cherenkov-Type Guided-Wave Terahertz Generation Via Cascaded Difference Frequency Generation," J. Lightwave Technol. 31, 2508-2514 (2013)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-31-15-2508

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