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Sub-Wavelength Gratings Assisted Ridge Waveguide Surface Couplers on Lithium Niobate Thin Film (Th1A.23)

Presenter: Sipan Yang, Shanghai Jiao Tong University

A thin-film lithium niobate ridge-waveguide grating coupler integrated with waveguide subwavelength gratings is experimentally demonstrated. An ultra-high coupling efficiency of -5.1 dB/coupler for TE polarization and over 90 nm 3-dB optical bandwidth are achieved.

Authors:Sipan Yang, Shanghai Jiao Tong University / Yaqian Li, Shanghai Jiao Tong University / Jinbin Xu, Shanghai Jiao Tong University / Liying Wu, Shanghai Jiao Tong University / Xueling Quan, Shanghai Jiao Tong University / Xiulan Cheng, Shanghai Jiao Tong University


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