Work

Ultra-compact Y-branch splitter on thin-film lithium niobate substrate

Year: 2025

Type: article

Abstract: We have proposed and demonstrated an ultra-compact Y-branch splitter on the thin-film lithium niobate (TFLN) platform with topology optimization. Fabrication constraints, such as minimum feature size and radius of curvature, are also involved within the optimization process. With optimized design and high aspect ratio etching techniques, the footprint of Y-branch splitter is only 6 μm ×4 μm while the average insertion loss is as low as 0.12 dB within 40 nm operation wavelength range. This work provides a potential solution for large-scale TFLN photonic integrated circuits in optical telecommunications and quantum photonics.

Source: Optical Materials Express

DOI: 10.1364/ome.553505

Authors: Deyang Kong, Huijie Sun, Shurui Huang, Yongzhuo Li, Xue Feng, Yidong Huang

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,843

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China

Awards: G1089414900, G2740656679, G315692808, G6932225400