1.5-&#956;m band tunable wavelength conversion based on fan-out grating in QPM-LN

Yiju Wang; Yuanqing Huang; Zihua Weng; Huangping Yan; Ruifang Ye; Jin Wan

doi:10.1117/12.756368

4 January 2008 1.5-μm band tunable wavelength conversion based on fan-out grating in QPM-LN

Yiju Wang, Yuanqing Huang, Zihua Weng, Huangping Yan, Ruifang Ye, Jin Wan

Proceedings Volume 6837, Information Optics and Photonics Technologies II; 683715 (2008) https://doi.org/10.1117/12.756368
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

In this paper, we demonstrated the tunable 1.5-μ m-band wavelength conversion based on cascaded second order nonlinear processes "SHG+DFG" by fan-out grating in lithium niobate waveguide for the first time. We fabricated the waveguide by annealed proton exchange in periodically poled LiNbO₃ (PPLN). The device used in this experiment is 4 cm long, has a QPM period from 14.8μm to 15.2μm, waveguide width of 12μm, proton exchange depth of 0.7μm, and was annealed for 32h at 350°C. After proton exchange in pure benzoic acid using a SiO₂ mask, the substrate was annealed in an oxygen atmosphere. The wavelength of signal light was set at 1551.3nm. The wavelengths of tunable pump lights we used in experiment were 1543.2 and 1556.2 nm, and the corresponding grating periods were 14.87μm and 15.03μm, respectively. The temperature was set at 100.5°C to avoid photo refractive damage and to match the QPM peaks to the pump wavelengths. The conversion efficiency was about 10dB to be expected with the pump power 175mW in a similar device with a slightly different QPM period and operated at 125°C.

Citation Download Citation

Yiju Wang, Yuanqing Huang, Zihua Weng, Huangping Yan, Ruifang Ye, and Jin Wan "1.5-μm band tunable wavelength conversion based on fan-out grating in QPM-LN", Proc. SPIE 6837, Information Optics and Photonics Technologies II, 683715 (4 January 2008); https://doi.org/10.1117/12.756368

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