High performance multifunction integrated optic circuits base on thin-film lithium niobate
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1.University of Chinese Academy of Sciences, Beijing 100049, China;2.State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors,;3.Innovation Academy for Microsatellites, Chinese Academy of Sciences, Shanghai 201304, China;4.Shanghai Engineering Center for Microsatellites, Shanghai 201210, China

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Beijing Natural Science Foundation (424206) and the Youth Innovation Promotion Association, CAS (2021108)

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    Abstract:

    This paper introduces an innovative Multifunction Integrated Optic Circuit (MIOC) design utilizing thin-film lithium niobate, surpassing traditional bulk waveguide-based MIOCs in terms of size, half-wave voltage requirements, and integration capabilities. By implementing a sub-wavelength grating structure, we achieve a Polarization Extinction Ratio (PER) exceeding 29 dB. Furthermore, our electrode design facilitates a voltage-length product (VπL) below 2 V·cm, while a double-tapered coupling structure significantly reduces insertion loss. This advancement provides a pivotal direction for the miniaturization and integration of optical gyroscopes, marking a substantial contribution to the field.

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History
  • Received:December 31,2024
  • Revised:March 07,2025
  • Adopted:March 11,2025
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