Tunable Second Harmonic Generation with High Conversion Efficiency in Periodically Poled Lithium Niobate Channel Waveguide |
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Authors: | XU Rong-hui CHEN Xian-feng CHEN Yu-ping YE Zhi-qing XIA Yu-xing |
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Abstract: | The experiment on quasi-phase-matched second harmonic generation (SHG) in a channel waveguide was reported.The waveguide was made by annealed proton exchange in the periodically poled lithium niobate (PPLN) with the period of PPLN of 14.9 μm, which was designed for cascading wavelength conversion in dense wavelength division multiplexer optical communications.The measurement results of SHG conversion efficiency as a function of fundamental wavelength at room temperature fit well to sinc2 shape.The peak of SHG conversion efficiency was 75% · W-1 · cm-2 as well as reported. The relationship between the center fundamental wavelength and tempera ture shows that SHG can be effectively tuned by the temperature in PPLN waveguide. |
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Keywords: | periodically poled lithium niobate (PPLN) second harmonic generation (SHG) waveguide quasiphase-matching |
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