{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T13:10:51Z","timestamp":1791810651224,"version":"4.3.4"},"reference-count":34,"publisher":"Optica Publishing Group","issue":"2","license":[{"start":{"date-parts":[[2026,1,13]],"date-time":"2026-01-13T00:00:00Z","timestamp":1768262400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2026,1,13]],"date-time":"2026-01-13T00:00:00Z","timestamp":1768262400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["62475126"],"award-info":[{"award-number":["62475126"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"},{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]},{"name":"The Key Research and Development Program of Ningxia Hui Autonomous Region","award":["2025BEG01003"],"award-info":[{"award-number":["2025BEG01003"]}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Lett."],"published-print":{"date-parts":[[2026,1,15]]},"abstract":"<jats:p>\n                    We report a high-performance erbium-doped tantalum pentoxide (Er\n                    <jats:sup>3+<\/jats:sup>\n                    : Ta\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>5<\/jats:sub>\n                    ) large-mode-area (LMA) waveguide amplifier fabricated by direct etching of the gain medium. The device achieves strong optical confinement and high pump\u2013signal overlap (&gt;98.6%) while maintaining propagation loss of 0.7\u2009dB\/cm after annealing. Under 140\u2009mW total pump power at 980\u2009nm, the 2.75-cm-long amplifier delivers a maximum on-chip signal enhancement of 38.1\u2009dB at 1530\u2009nm and 24.1\u2009dB at 1550\u2009nm, corresponding to net gains of 8.6 and 9.6\u2009dB, respectively, with gain exceeding 3\u2009dB\/cm across the C-band. Large-signal measurements show a maximum output power of 2.4\u2009mW (1.25\u2009dB net gain), confirming stable high-power operation enabled by the LMA design. A minimum noise figure of 5.68\u2009dB is achieved at 1550.5\u2009nm. This device not only overcomes the fabrication challenges associated with Er\n                    <jats:sup>3+<\/jats:sup>\n                    : Ta\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>5<\/jats:sub>\n                    and validates its amplification potential, but also demonstrates excellent large-signal amplification performance, highlighting its strong potential for compact, high-output, and low-noise on-chip optical amplification in integrated photonic systems.\n                  <\/jats:p>","DOI":"10.1364\/ol.585502","type":"journal-article","created":{"date-parts":[[2025,12,22]],"date-time":"2025-12-22T20:00:10Z","timestamp":1766433610000},"page":"452","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Large-mode area erbium-doped tantalum pentoxide waveguide amplifier with high on-chip net gain"],"prefix":"10.1364","volume":"51","author":[{"given":"Yuhan","family":"Sun","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/030bhh786","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-6100-0091","authenticated-orcid":true,"given":"Qi","family":"Cheng","sequence":"additional","affiliation":[{"name":"Ningbo University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-5695-7154","authenticated-orcid":true,"given":"Lipeng","family":"Xia","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/030bhh786","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ze","family":"Wang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/030bhh786","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peng","family":"Chen","sequence":"additional","affiliation":[{"name":"Ningbo University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhe","family":"Long","sequence":"additional","affiliation":[{"name":"Ningbo University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4426-824X","authenticated-orcid":true,"given":"Rongping","family":"Wang","sequence":"additional","affiliation":[{"name":"Ningbo University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7675-8542","authenticated-orcid":true,"given":"Yi","family":"Zou","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/030bhh786","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,1,13]]},"reference":[{"key":"ol-51-2-452-R1","doi-asserted-by":"publisher","first-page":"064001","DOI":"10.1117\/1.AP.7.6.064001","type":"journal-article","volume":"7","author":"He","year":"2025","journal-title":"Adv. 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All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.","name":"copyright","label":"Copyright"}]}}