Efficient and Broadband Trident Spot-Size Convertor for Thin-Film Lithium Niobate Integrated Device

Autor:	Xuerui Liang, Li Fu, Qianchen Yu, Zhenfeng Xue, Xiaodong Shi, Yaoqin Lu, Honggang Chen, Bo Zhang, Yong Luo, Qianggao Hu, Haiyan Ou, Weidong Ma
Rok vydání:	2023
Předmět:	Optical waveguides Optical fiber communication Couplings Optical fiber couplers Optical fiber devices Electrical and Electronic Engineering Couplers Optical fiber polarization Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials
Zdroj:	Liang, X, Fu, L, Yu, Q, Xue, Z, Shi, X, Lu, Y, Chen, H, Zhang, B, Luo, Y, Hu, Q, Ou, H & Ma, W 2022, ' Efficient and Broadband Trident Spot-size Convertor for Thin-Film Lithium Niobate Integrated Device ', IEEE Photonics Technology Letters, vol. 35, no. 1, pp. 35-38 . https://doi.org/10.1109/LPT.2022.3221195
ISSN:	1941-0174 1041-1135
DOI:	10.1109/lpt.2022.3221195
Popis:	Thin-film lithium niobate on insulator (LNOI) has recently emerged as a promising platform for high-speed optical communication devices. For practical applications, an efficient, polarization-insensitive, misalignment-tolerant and broadband fiber-to-chip optical coupler is necessary. In this paper, we present a fiber-to-chip edge coupler based on trident spot-size convertor (SSC). Experiment shows 1.18/1.10 dB per facet low loss at 1550 nm for TE/TM polarization respectively. A relatively large alignment tolerance (AT) has also been demonstrated. Over a broadband wavelength range from 1490 nm ~ 1640 nm, the edge coupler exhibits a maximum loss of 1.30 dB, a wavelength dependent loss (WDL) of 0.23 dB for TE mode and a polarization dependent loss (PDL) of 0.33 dB when coupled to a single mode fiber (SMF) with a mode field diameter (MFD) of ~6 μm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9606097ed3bc31db6f64d8124c30bc9f https://doi.org/10.1109/lpt.2022.3221195 Zobrazit plný text záznamu