{"title":"Broadband adiabatic power splitter on an etchless thin-film lithium niobate platform.","authors":"Yushu Fu, Shangrong Li, Shijie Sun, Xia Ning, Ziyu Zhou, Daming Zhang, Xibin Wang","doi":"10.1364/OL.565904","DOIUrl":null,"url":null,"abstract":"<p><p>Lithium niobate on insulator (LNOI) is a promising platform for photonic integrated circuits (PICs), and 3-dB power splitters are the most essential building blocks in PICs. In this Letter, we propose and demonstrate a broadband, fabrication-tolerant 3-dB power splitter based on the photonic bound state in the continuum (BIC) and using a spatial adiabatic passage structure on a polymer-loaded LNOI platform. The simulation results show that the proposed device can achieve a splitting ratio of 50%:50% with an excellent operating bandwidth of 180 nm (from 1450 nm to 1630 nm). The fabricated device on the EpoCore-loaded LNOI platform features a power-splitting ratio of ∼50.13%:49.87% for both output ports within the 1530-1630 nm wavelength range. With its outstanding performance and simple fabrication process, the demonstrated 3-dB power splitter is essential for on-chip optical interconnect systems.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4146-4149"},"PeriodicalIF":3.1000,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.565904","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Lithium niobate on insulator (LNOI) is a promising platform for photonic integrated circuits (PICs), and 3-dB power splitters are the most essential building blocks in PICs. In this Letter, we propose and demonstrate a broadband, fabrication-tolerant 3-dB power splitter based on the photonic bound state in the continuum (BIC) and using a spatial adiabatic passage structure on a polymer-loaded LNOI platform. The simulation results show that the proposed device can achieve a splitting ratio of 50%:50% with an excellent operating bandwidth of 180 nm (from 1450 nm to 1630 nm). The fabricated device on the EpoCore-loaded LNOI platform features a power-splitting ratio of ∼50.13%:49.87% for both output ports within the 1530-1630 nm wavelength range. With its outstanding performance and simple fabrication process, the demonstrated 3-dB power splitter is essential for on-chip optical interconnect systems.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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