{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T06:15:09Z","timestamp":1777443309434,"version":"3.51.4"},"reference-count":20,"publisher":"SAGE Publications","issue":"11","license":[{"start":{"date-parts":[[2025,4,15]],"date-time":"2025-04-15T00:00:00Z","timestamp":1744675200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/100007000","name":"Laboratory Directed Research and Development","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100007000","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Office of Fossil, Energy, and Carbon Management"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Appl Spectrosc"],"published-print":{"date-parts":[[2025,11]]},"abstract":"<jats:p>\n                    Fiber-based Raman spectroscopy enhances the Raman signal by maximizing the overlap of the optical field and the gas species. However, filling the hollow-core fiber (HCF) with gas requires time that is dependent on the fiber core diameter, fiber length, and pressure of the gas. At ambient pressure, the fiber gas uptake is driven by diffusion into the fiber ends, severely limiting the response time of the system. By laser drilling access holes to the core along the length of the fiber, the uptake time of the gas is reduced, improving the system response time. In this work, we study the carbon dioxide (CO\n                    <jats:sub>2<\/jats:sub>\n                    ) sensor dynamics based on Raman signal intensity generated in HCFs. The signal intensity versus gas concentration is characterized by controlling the CO\n                    <jats:sub>2<\/jats:sub>\n                    concentration in the surrounding environment of the fiber. Next, we characterize the gas uptake time in HCFs as a function of fiber length. Finally, we optimize the access hole configuration along the fiber, demonstrating reduced sensor uptake time by a factor of three.\n                  <\/jats:p>","DOI":"10.1177\/00037028251329418","type":"journal-article","created":{"date-parts":[[2025,4,15]],"date-time":"2025-04-15T10:50:14Z","timestamp":1744714214000},"page":"1605-1614","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Enhanced Carbon Dioxide Uptake in Drilled Hollow Core Fibers for Raman Spectroscopy"],"prefix":"10.1177","volume":"79","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9674-958X","authenticated-orcid":false,"given":"Brandon","family":"Demory","sequence":"first","affiliation":[{"name":"Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California, USA 94550"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-7432-4601","authenticated-orcid":false,"given":"Jorge","family":"Arteaga","sequence":"additional","affiliation":[{"name":"Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California, USA 94550"},{"name":"University of California Merced"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-6714-0747","authenticated-orcid":false,"given":"Sarah","family":"Sahota-Dhillon","sequence":"additional","affiliation":[{"name":"Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California, USA 94550"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3440-7194","authenticated-orcid":false,"given":"Sayantani","family":"Ghosh","sequence":"additional","affiliation":[{"name":"University of California Merced"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4008-542X","authenticated-orcid":false,"given":"Tiziana","family":"Bond","sequence":"additional","affiliation":[{"name":"Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California, USA 94550"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4893-5417","authenticated-orcid":false,"given":"Allan","family":"Chang","sequence":"additional","affiliation":[{"name":"Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California, USA 94550"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,4,15]]},"reference":[{"key":"e_1_3_3_2_2","volume-title":"Raman Spectroscopy","author":"Long D.A.","year":"1977","unstructured":"Long D.A.. 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Lecce Italy; 26\u201329 October 2008. 10.1109\/ICSENS.2008.4716677","DOI":"10.1109\/ICSENS.2008.4716677"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.1109\/50.779159"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1109\/JLT.2006.885258"},{"key":"e_1_3_3_12_2","first-page":"434","article-title":"Compact, Stable, and Efficient All-Fibre Gas Cells Using Hollow-Core Photonic Crystal Fibres","author":"Benabid F.","year":"2005","unstructured":"Benabid F., Couny F., Knight J.C., Birks T.A., St. J P.. Russell. \u201cCompact, Stable, and Efficient All-Fibre Gas Cells Using Hollow-Core Photonic Crystal Fibres\u201d. 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