Efficient 671 nm red light generation in annealed proton-exchanged periodically poled LiNbO<sub>3</sub> waveguides

Yunfei Niu; Lei Yang; Dongjie Guo; Yan Chen; Xiaoyang Li; Gang Zhao; Xiaopeng Hu

doi:doi:10.3788/COL202018.111902

Chinese Optics Letters, 2020, 18 (11): 111902, Published Online: Sep. 29, 2020

Efficient 671 nm red light generation in annealed proton-exchanged periodically poled LiNbO₃ waveguides Download： 692次

Yunfei Niu Lei Yang Dongjie Guo Yan Chen Xiaoyang Li Gang Zhao ^*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

Figures & Tables

Fig. 1. (a) Refractive index increment as a function of surface proton concentration $C_{0}$ in 6 μm wide channel APE waveguides with annealing depth of 3 μm. (b) Theoretical poling period for our APE PPLN structure as a function of temperature, where the surface proton concentration $C_{0}$ varies from 0.12 to 0.16.

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Fig. 2. (a) SEM picture of ${SiO}_{2}$ mask. (b) Image of the inverted domain structure of the APE waveguide recorded using confocal SH microscopy. (c) The measured and fitted transmission spectra of the waveguide.

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Fig. 3. Schematic experimental setup. The two insets are the images of the FW and SH wave, respectively.

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Fig. 4. Temperature tuning curve of APE PPLN waveguide with 11.78 μm poling period. The black dots and the dashed red line are the measured data and fitted curve, respectively.

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Fig. 5. Measured SHG conversion efficiency as a function of the power of FW with (a) CW and (b) 50 ns, 10 kHz pulsed input. The blue dots and the green line correspond to the measured conversion efficiency and the linear fitting curve, respectively.

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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.

Efficient 671 nm red light generation in annealed proton-exchanged periodically poled LiNbO₃ waveguides Download： 692次

Fig. 2. (a) SEM picture of ${SiO}_{2}$ mask. (b) Image of the inverted domain structure of the APE waveguide recorded using confocal SH microscopy. (c) The measured and fitted transmission spectra of the waveguide.

Fig. 3. Schematic experimental setup. The two insets are the images of the FW and SH wave, respectively.

Fig. 4. Temperature tuning curve of APE PPLN waveguide with 11.78 μm poling period. The black dots and the dashed red line are the measured data and fitted curve, respectively.

Fig. 5. Measured SHG conversion efficiency as a function of the power of FW with (a) CW and (b) 50 ns, 10 kHz pulsed input. The blue dots and the green line correspond to the measured conversion efficiency and the linear fitting curve, respectively.

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Efficient 671 nm red light generation in annealed proton-exchanged periodically poled LiNbO3 waveguides Download： 692次

Fig. 2. (a) SEM picture of SiO2 mask. (b) Image of the inverted domain structure of the APE waveguide recorded using confocal SH microscopy. (c) The measured and fitted transmission spectra of the waveguide.

Fig. 3. Schematic experimental setup. The two insets are the images of the FW and SH wave, respectively.

Fig. 4. Temperature tuning curve of APE PPLN waveguide with 11.78 μm poling period. The black dots and the dashed red line are the measured data and fitted curve, respectively.

Fig. 5. Measured SHG conversion efficiency as a function of the power of FW with (a) CW and (b) 50 ns, 10 kHz pulsed input. The blue dots and the green line correspond to the measured conversion efficiency and the linear fitting curve, respectively.

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Efficient 671 nm red light generation in annealed proton-exchanged periodically poled LiNbO₃ waveguides Download： 692次

Fig. 2. (a) SEM picture of ${SiO}_{2}$ mask. (b) Image of the inverted domain structure of the APE waveguide recorded using confocal SH microscopy. (c) The measured and fitted transmission spectra of the waveguide.