Novel design of Y-branch in LiNbO3 by proton exchange

Shanying Lu; Xiaoping Zhou; Xiaoqing Jiang; Minghua Wang

doi:10.1117/12.481216

28 August 2002 Novel design of Y-branch in LiNbO₃ by proton exchange

Shanying Lu, Xiaoping Zhou, Xiaoqing Jiang, Minghua Wang

Proceedings Volume 4904, Optical Fiber and Planar Waveguide Technology II; (2002) https://doi.org/10.1117/12.481216
Event: Asia-Pacific Optical and Wireless Communications 2002, 2002, Shanghai, China

Abstract

We design and analyze a novel low-loss symmetric Y-branch in Lithium Niobate by heavily annealed proton exchange (APE). In this design, a wide transitional waveguide is used between the input and two S-shape output waveguides, making the field match with the mode in the two output waveguides by intentionally generating second-order mode and radiation. By this method, optical power can be coupled into the two output waveguides with high efficiency. simultaneously , the minimum gap between the two output waveguides is 2.7 microns, thus the stem region of this Y-branch has no sharp taper and the fabrication of the device is easy. The Y-branch is optimized by the method of three-dimensional FD-BPM, after optimization, losses can be less than 0.05dB.

Citation Download Citation

Shanying Lu, Xiaoping Zhou, Xiaoqing Jiang, and Minghua Wang "Novel design of Y-branch in LiNbO₃ by proton exchange", Proc. SPIE 4904, Optical Fiber and Planar Waveguide Technology II, (28 August 2002); https://doi.org/10.1117/12.481216

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