{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T22:47:54Z","timestamp":1790722074802,"version":"4.1.0"},"reference-count":10,"publisher":"AIP Publishing","issue":"6","funder":[{"DOI":"10.13039\/100000015","name":"U.S. Department of Energy","doi-asserted-by":"publisher","award":["DE-SC0022578"],"award-info":[{"award-number":["DE-SC0022578"]}],"id":[{"id":"10.13039\/100000015","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000015","name":"U.S. Department of Energy","doi-asserted-by":"publisher","award":["DE-AC05-00OR22725"],"award-info":[{"award-number":["DE-AC05-00OR22725"]}],"id":[{"id":"10.13039\/100000015","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,6,1]]},"abstract":"<jats:p>Fiber-optic bolometers (FOBs) designed for plasma radiation measurement in magnetically confined fusion environments have been previously developed and tested at the DIII-D tokamak. These FOBs utilize a silicon Fabry\u2013Perot interferometer at the fiber tip for temperature measurement and a gold disk as a radiation absorber. This paper presents recent advancements in the development of FOBs with reduced cooling time constants and enhanced temperature tolerance. We also demonstrate high-temperature operation and report findings from irradiation tests. By incorporating a copper sensor holder as a thermal sink and integrating two closely packed sensor heads into a compact design, the cooling time constants were reduced to \u223c100\u00a0ms in vacuum, while minimizing uncertainties caused by temperature gradients. The FOBs were subjected to heating at 400\u2009\u00b0C for five hours, with no observed degradation in noise performance post-heating. High-temperature operation tests were conducted at \u223c220\u2009\u00b0C using a 404\u00a0nm square-wave modulated laser to simulate the plasma radiation. In addition, four FOBs constructed from copper-coated pure-silica fibers were fabricated and underwent irradiation testing, enduring a total \u03b3-radiation dose of 15.2 MGy and a neutron fluence of 1.6 \u00d7 1018 n\/cm2. The FOBs maintained their physical integrity and the optical signal shows high visibility throughout the test.<\/jats:p>","DOI":"10.1063\/5.0273302","type":"journal-article","created":{"date-parts":[[2025,6,23]],"date-time":"2025-06-23T14:02:51Z","timestamp":1750687371000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":3,"title":["Fiber-optic bolometers with high-temperature tolerance and reduced time constants for fusion plasma diagnostics"],"prefix":"10.1063","volume":"96","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5039-3998","authenticated-orcid":false,"given":"Qiwen","family":"Sheng","sequence":"first","affiliation":[{"name":"Nusenics 1 , 4942 Dawn Ave., East Lansing, Michigan 48823,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-1875-6291","authenticated-orcid":false,"given":"Xiaoli","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Michigan State University 2 , East Lansing, Michigan 48824,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7761-1879","authenticated-orcid":false,"given":"Musaddeque","family":"Syed","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Michigan State University 2 , East Lansing, Michigan 48824,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5225-4588","authenticated-orcid":false,"given":"Hasanur R.","family":"Chowdhury","sequence":"additional","affiliation":[{"name":"Nusenics 1 , 4942 Dawn Ave., East Lansing, Michigan 48823,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7028-9004","authenticated-orcid":false,"given":"Seungsup","family":"Lee","sequence":"additional","affiliation":[{"name":"Oak Ridge National Laboratory 3 , Oak Ridge, Tennessee 37831,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-2066-2241","authenticated-orcid":false,"given":"Andrew","family":"Dvorak","sequence":"additional","affiliation":[{"name":"Oak Ridge National Laboratory 3 , Oak Ridge, Tennessee 37831,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9808-6305","authenticated-orcid":false,"given":"Morgan W.","family":"Shafer","sequence":"additional","affiliation":[{"name":"Oak Ridge National Laboratory 3 , Oak Ridge, Tennessee 37831,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3595-4560","authenticated-orcid":false,"given":"Ming","family":"Han","sequence":"additional","affiliation":[{"name":"Nusenics 1 , 4942 Dawn Ave., East Lansing, Michigan 48823,","place":["USA"]},{"name":"Department of Electrical and Computer Engineering, Michigan State University 2 , East Lansing, Michigan 48824,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2025,6,23]]},"reference":[{"key":"2025062310024538000_c1","doi-asserted-by":"publisher","first-page":"744","DOI":"10.1063\/1.1142078","volume":"62","year":"1991","journal-title":"Rev. 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