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  • Title: High modulation efficiency and large bandwidth thin-film lithium niobate modulator for visible light.
    Author: Li C, Chen B, Ruan Z, Wu H, Zhou Y, Liu J, Chen P, Chen K, Guo C, Liu L.
    Journal: Opt Express; 2022 Sep 26; 30(20):36394-36402. PubMed ID: 36258568.
    Abstract:
    We experimentally demonstrate an integrated visible light modulator at 532 nm on the thin-film lithium niobate platform. The waveguides on such platform feature a propagation loss of 2.2 dB/mm while a grating for fiber interface has a coupling loss of 5 dB. Our fabricated modulator demonstrates a low voltage-length product of 1.1 V·cm and a large electro-optic bandwidth with a roll-off of -1.59 dB at 25 GHz for a length of 3.3 mm. This device offers a compact and large bandwidth solution to the challenge of integrated visible wavelength modulation in lithium niobate and paves the way for future small-form-factor integrated systems at visible wavelengths.
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