Sub-wavelength Gratings Assisted Ridge Waveguide Surface Couplers on Lithium Niobate Thin Film

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.

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Bibliographic Details
Published in2021 Optical Fiber Communications Conference and Exhibition (OFC) pp. 1 - 3
Main Authors Yang, Sipan, Li, Yaqian, Xu, Jinbin, Wu, Liying, Quan, Xueling, Cheng, Xiulan
Format Conference Proceeding
LanguageEnglish
Published OSA 01.06.2021
Subjects
Couplers
Lithium niobate
Optical device fabrication
Optical fibers
Optical polarization
Optical variables measurement
Surface waves
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Summary: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.