Mitigating photorefractive effect in thin-film lithium niobate microring resonators

Thin-film lithium niobate is an attractive integrated photonics platform due to its low optical loss and favorable optical nonlinear and electro-optic properties. However, in applications such as second harmonic generation, frequency comb generation, and microwave-to-optics conversion, the device pe...

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Bibliographic Details
Published in:Optics express 2021-02, Vol.29 (4), p.5497-5504
Main Authors: Xu, Yuntao, Shen, Mohan, Lu, Juanjuan, Surya, Joshua B, Sayem, Ayed Al, Tang, Hong X
Format: Article
Language:English
Subjects:
ENGINEERING
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Summary:Thin-film lithium niobate is an attractive integrated photonics platform due to its low optical loss and favorable optical nonlinear and electro-optic properties. However, in applications such as second harmonic generation, frequency comb generation, and microwave-to-optics conversion, the device performance is strongly impeded by the photorefractive effect inherent in thin-film lithium niobate. In this paper, we show that the dielectric cladding on a lithium niobate microring resonator has a significant influence on the photorefractive effect. By removing the dielectric cladding layer, the photorefractive effect in lithium niobate ring resonators can be effectively mitigated. Our work presents a reliable approach to control the photorefractive effect on thin-film lithium niobate and will further advance the performance of integrated classical and quantum photonic devices based on thin-film lithium niobate.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.418877