Ultrabroadband tunable continuous-wave difference-frequency generation in periodically poled lithium niobate waveguides Journal Articles uri icon

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  • We report, for what is the first time to our knowledge, widely tunable mid-IR light generation over a range of greater than 1000 nm in the 4 microm region by employing a single quasi-phase-matched periodically poled niobate waveguide at room temperature. The waveguide we used was fabricated by annealed proton exchange based on periodically poled lithium niobate. A peak conversion efficiency of 10%/W and a linewidth as small as 37 MHz were achieved. The developed mid-IR light generator may find wide applications in trace gas detection of multiple atmospheric species and high-resolution spectroscopy.


  • Cao, Zhensong
  • Han, Ling
  • Liang, Wanguo
  • Deng, Lunhua
  • Wang, Huan
  • Xu, Chang Qing
  • Zhang, Weijun
  • Gong, Zhiben
  • Gao, Xiaoming

publication date

  • July 1, 2007