{"title":"Effect of temperature on Brillouin scattering in gas-filled hollow-core fibers.","authors":"Xiaohui Huang, Yun Qi, Meng Pang, Fan Yang","doi":"10.1364/OL.549654","DOIUrl":null,"url":null,"abstract":"<p><p>Stimulated Brillouin scattering (SBS) in gas-filled hollow-core fibers (HCFs) provides high gain and narrow linewidth, making it a promising platform for advanced photonic applications. While Brillouin gain is known to depend quadratically on pressure and linewidth inversely on pressure, the combined effect of pressure and temperature - through their influence on gas density-has not been fully explored. In this study, we demonstrate that lowering the gas temperature from 373.15 K to 233.15 K at a pressure of 100 bars (using nitrogen) leads to a six-fold increase in Brillouin gain and a twofold reduction in linewidth. We systematically investigate the temperature dependence of key Brillouin parameters, including gain, frequency shift, linewidth, acoustic velocity, and temperature sensitivity, in nitrogen and carbon dioxide gases. The results reveal distinct temperature-dependent behaviors, aligning well with theoretical predictions, and provide new insights, to the best of our knowledge, into optimizing SBS performance in gas-filled hollow-core fibers.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 5","pages":"1536-1539"},"PeriodicalIF":3.1000,"publicationDate":"2025-03-01","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.549654","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
Stimulated Brillouin scattering (SBS) in gas-filled hollow-core fibers (HCFs) provides high gain and narrow linewidth, making it a promising platform for advanced photonic applications. While Brillouin gain is known to depend quadratically on pressure and linewidth inversely on pressure, the combined effect of pressure and temperature - through their influence on gas density-has not been fully explored. In this study, we demonstrate that lowering the gas temperature from 373.15 K to 233.15 K at a pressure of 100 bars (using nitrogen) leads to a six-fold increase in Brillouin gain and a twofold reduction in linewidth. We systematically investigate the temperature dependence of key Brillouin parameters, including gain, frequency shift, linewidth, acoustic velocity, and temperature sensitivity, in nitrogen and carbon dioxide gases. The results reveal distinct temperature-dependent behaviors, aligning well with theoretical predictions, and provide new insights, to the best of our knowledge, into optimizing SBS performance in gas-filled hollow-core fibers.
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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