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  • Received: Jun. 28, 2020

    Accepted: Aug. 3, 2020

    Posted: Sep. 27, 2020

    Published Online: Sep. 29, 2020

    The Author Email: Gang Zhao (zhaogang@nju.edu.cn), Xiaopeng Hu (xphu@nju.edu.cn)

    DOI: 10.3788/COL202018.111902

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    Yunfei Niu, Lei Yang, Dongjie Guo, Yan Chen, Xiaoyang Li, Gang Zhao, Xiaopeng Hu. Efficient 671 nm red light generation in annealed proton-exchanged periodically poled LiNbO3 waveguides[J]. Chinese Optics Letters, 2020, 18(11): 111902

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Chinese Optics Letters, Vol. 18, Issue 11, 111902 (2020)

Efficient 671 nm red light generation in annealed proton-exchanged periodically poled LiNbO3 waveguides 

Yunfei Niu, Lei Yang, Dongjie Guo, Yan Chen, Xiaoyang Li, Gang Zhao*, and Xiaopeng Hu**

Author Affiliations

  • National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and School of Physics, Nanjing University, Nanjing 210093, China

Abstract

We report efficient generation of 671 nm red light based on quasi-phase-matched second harmonic generation of 1342 nm in LiNbO3 waveguides. The design method and fabrication process of the high-quality annealed proton-exchanged periodically poled channel waveguides were presented. A continuous-wave 1.71 mW red light was obtained with a single-pass conversion efficiency of 47%·W-1·cm-2, which is 88% that of the theoretical value. While for 1 mW quasi-continuous-laser input, the corresponding peak power being 2 W, the conversion efficiency reached up to 60%. Our results indicate that the annealed proton-exchanged periodically poled LiNbO3 waveguide is promising for high-efficiency and low power consumption nonlinear generation of visible light.

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