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5 October 2000 Second and third harmonic generation in quasi-phase-matched annealed proton-exchanged lithium niobate waveguides
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Proceedings Volume 4223, Instruments for Optics and Optoelectronic Inspection and Control; (2000) https://doi.org/10.1117/12.401752
Event: Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, 2000, Beijing, China
Abstract
Waveguide quasi-phase-matched second-harmonic generation devices are being studied as a promising candidate for realization of a compact short wavelength coherent light source. In this paper, we report quasi-phase-matched second harmonic generation (SHG) in proton-exchanged (PE) lithium niobate waveguide with the fundamental wavelength of 1300nm. The domain inversion was obtained by Ti-indiffusion method near Cuire temperature. The waveguide was fabricated by proton-exchange in the melting benzonic acid, followed by annealing in the air. SHG efficiency as high as 22 percent was observed in the 5mm long periodically pulsed PE lithium niobate waveguide. The SHG conversion efficiency as a function of the fundamental wavelength was measured which exhibits good agreement with the theoretical study. We also found the third harmonic generation from the QPM PE waveguide caused by the cascading nonlinear optical procedures including SHG and sum frequency generation.
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Xianfeng Chen, YuXing Xia, Shengwu Xie, Yuping Chen, and Yingli Chen "Second and third harmonic generation in quasi-phase-matched annealed proton-exchanged lithium niobate waveguides", Proc. SPIE 4223, Instruments for Optics and Optoelectronic Inspection and Control, (5 October 2000); https://doi.org/10.1117/12.401752
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