Ultra-low loss edge coupler based on thin-film lithium niobite

Changran Hu; An Pan; Tingan Li; Yuheng Liu; Shiqi Tao; Cheng Zeng; Jinsong Xia

doi:10.1117/12.2588828

18 March 2021 Ultra-low loss edge coupler based on thin-film lithium niobite

Changran Hu, An Pan, Tingan Li, Yuheng Liu, Shiqi Tao, Cheng Zeng, Jinsong Xia

Proceedings Volume 11780, Global Intelligent Industry Conference 2020; 1178008 (2021) https://doi.org/10.1117/12.2588828
Event: Global Intelligent Industry Conference 2020, 2020, Guangzhou, China

Abstract

Lithium niobate (LN) devices have been used in optical communication and nonlinear optics widely due to its impressive optical properties. Thin-film lithium niobate on insulator (LNOI) improves performances of LN-based devices further. But a high-efficient fiber-chip optical coupler for the LNOI-based devices for practical applications is still absent. In this article, we demonstrate a wide-band, highly efficient and polarization independent edge coupler based on LNOI fabricated by planar semiconductor process. The measured ultra-high numerical aperture fiber (UHNAF)-to-chip optical coupling loss at 1550 nm is 0.54 dB/facet (0.59 dB/facet) for TE(TM). The coupler has the coupling loss lower than 1dB/facet for both TE and TM light at wavelengths longer than 1527nm.

Citation Download Citation

Changran Hu, An Pan, Tingan Li, Yuheng Liu, Shiqi Tao, Cheng Zeng, and Jinsong Xia "Ultra-low loss edge coupler based on thin-film lithium niobite", Proc. SPIE 11780, Global Intelligent Industry Conference 2020, 1178008 (18 March 2021); https://doi.org/10.1117/12.2588828

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