{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T19:03:07Z","timestamp":1790622187794,"version":"4.1.0"},"reference-count":38,"publisher":"Optica Publishing Group","issue":"20","license":[{"start":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T00:00:00Z","timestamp":1790553600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR-OA"},{"start":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T00:00:00Z","timestamp":1790553600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"name":"National Natural Science Foundation of China","award":["62105078"],"award-info":[{"award-number":["62105078"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Distinguished Young Scholars of Natural Science Foundation of Heilongjiang","award":["(JQ2022F001"],"award-info":[{"award-number":["(JQ2022F001"]}]},{"name":"Youth Program of Natural Science Foundation of Shandong","award":["ZR2021QF009"],"award-info":[{"award-number":["ZR2021QF009"]}]},{"name":"Young Elite Scientists Sponsorship Program by CAST","award":["2022QNRC001"],"award-info":[{"award-number":["2022QNRC001"]}]},{"name":"Fundamental Research Funds of the Central University","award":["3072024XX2702, 3072025WD2503"],"award-info":[{"award-number":["3072024XX2702, 3072025WD2503"]}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Express"],"published-print":{"date-parts":[[2026,10,5]]},"abstract":"<jats:p>\n                    Advancing AI and 6G technologies escalate bandwidth demands, driving interest in bismuth-doped fibers (BDFs) for ultra-broadband amplification. However, photobleaching (PB) of silicon-related bismuth active centers (BAC-Si) limits deployment, a process traditionally attributed to extrinsic defect-mediated electron transfer. Here, bismuth-erbium co-doped fibers (BEDFs) were irradiated by a 248-nm laser over 0\u2013100,000 pulses to control defect transformation. Irradiation altered BAC-Si concentration and microenvironment but did not exacerbate the PB effect under 830-nm pumping. Consequently, we propose that PB originates from intrinsic structural distortion via excited-state (E\n                    <jats:sub>s<\/jats:sub>\n                    ) vibronic coupling, characteristic of the pseudo-Jahn-Teller effect (PJTE), unifying PB initiation and modulation mechanisms.\n                  <\/jats:p>","DOI":"10.1364\/oe.609730","type":"journal-article","created":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T02:00:07Z","timestamp":1789437607000},"page":"37758","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Photobleaching of silicon-related bismuth active centers originating from pseudo-Jahn-Teller effect-driven structural distortion"],"prefix":"10.1364","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-5901-1706","authenticated-orcid":true,"given":"Qi","family":"Yang","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03x80pn82","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-7706-6410","authenticated-orcid":true,"given":"Yuqin","family":"Zhang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03x80pn82","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bowen","family":"Zhang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03x80pn82","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yushi","family":"Chu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03x80pn82","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gang-Ding","family":"Peng","sequence":"additional","affiliation":[{"name":"University of New South Wales"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianzhong","family":"Zhang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03x80pn82","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,9,28]]},"reference":[{"key":"oe-34-20-37758-R3","doi-asserted-by":"publisher","first-page":"3447","DOI":"10.1364\/OL.37.003447","type":"journal-article","volume":"37","author":"Luo","year":"2012","journal-title":"Opt. 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