{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T18:13:54Z","timestamp":1783448034308,"version":"3.55.0"},"reference-count":20,"publisher":"Optica Publishing Group","issue":"14","license":[{"start":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T00:00:00Z","timestamp":1783382400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR-OA"},{"start":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T00:00:00Z","timestamp":1783382400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Express"],"published-print":{"date-parts":[[2026,7,13]]},"abstract":"<jats:p>The packing density of fiber-optic interfaces is ultimately limited by the cladding diameter. We investigate direct laser welding of multi-core fibers as a means for overcoming this limit in constructing arbitrary-pitch arrayed optical interfaces. We demonstrate that submicron-precision laser welding, previously shown for single-core fibers, can be used to construct multicore fiber interfaces while fully preserving the beam quality of each core. This report describes the application of the new technique to 4- and 7-core fibers and quantifies the resulting beam quality to confirm laser welding invariance with respect to the radial distribution of the cores.<\/jats:p>","DOI":"10.1364\/oe.601126","type":"journal-article","created":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T16:00:08Z","timestamp":1782403208000},"page":"25935","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Ultra-dense, laser-welded, multi-core fiber-optic interfaces"],"prefix":"10.1364","volume":"34","author":[{"given":"Peter","family":"Radic","sequence":"first","affiliation":[{"name":"Rose-Hulman Institute of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Per","family":"Adamson","sequence":"additional","affiliation":[{"name":"TE Connectivity"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert","family":"Balonek","sequence":"additional","affiliation":[{"name":"TE Connectivity"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mike","family":"Cinquino","sequence":"additional","affiliation":[{"name":"TE Connectivity"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew J.","family":"Hesford","sequence":"additional","affiliation":[{"name":"TE Connectivity"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joey","family":"Lawson","sequence":"additional","affiliation":[{"name":"TE Connectivity"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John R.","family":"Marciante","sequence":"additional","affiliation":[{"name":"RAM Photonics Industrial"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,7,7]]},"reference":[{"key":"oe-34-14-25935-R2","doi-asserted-by":"publisher","first-page":"A143","DOI":"10.1364\/JOCN.501427","type":"journal-article","volume":"16","author":"Maniotis","year":"2024","journal-title":"J. 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