{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T19:39:29Z","timestamp":1790797169030,"version":"4.1.0"},"reference-count":45,"publisher":"Wiley","issue":"15","license":[{"start":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T00:00:00Z","timestamp":1785283200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T00:00:00Z","timestamp":1785283200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62275150"],"award-info":[{"award-number":["62275150"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Nanophotonics"],"published-print":{"date-parts":[[2026,8,13]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>We demonstrate an ultra\u2010compact fiber facet graphene oxide (GO) microlenses array fabricated through femtosecond laser direct writing (FLDW). Taking advantage of the broadband transparency, mechanical, and laser\u2010tunable optical properties of GO, the device realizes phase modulation in a 400\u00a0nm film, enabling multi\u2010focus beam splitting and focusing. A coreless fiber segment is fusion\u2010spliced to a standard single\u2010mode fiber to expand the mode field, and a high\u2010density array of 19 microlenses is integrated on the beam\u2010expanding fiber facet; the device achieved focal lengths ranging from 8.0 to 9.6  and numerical apertures (NA) from 0.60 to 0.74. Experimental results at 850, 1310, and 1550\u00a0nm demonstrate broadband compatibility. This single\u2010step fabricated, ultrathin device offers a compact scalable solution for fiber\u2010probe imaging, multi\u2010point sensing, micro\u2010optical manipulation and integrated nanophotonic systems.<\/jats:p>","DOI":"10.1002\/nap2.70217","type":"journal-article","created":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T11:21:37Z","timestamp":1785324097000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Ultra Compact and Broadband Fiber Facet Graphene Oxide Microlens Array Fabricated on a Beam\u2010Expanding Fiber Facet Using Femtosecond Laser Direct Writing Technique"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-3395-9619","authenticated-orcid":false,"given":"Xiaoke","family":"Chen","sequence":"first","affiliation":[{"name":"State Key Laboratory of Photonics and Communications Shanghai Jiao Tong University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8382-7940","authenticated-orcid":false,"given":"Lin","family":"Ma","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Photonics and Communications Shanghai Jiao Tong University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Linbin","family":"Bai","sequence":"additional","affiliation":[{"name":"Shanghai Optoweave Technology Co. 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Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tianqi","family":"Cheng","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Photonics and Communications Shanghai Jiao Tong University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zuyuan","family":"He","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Photonics and Communications Shanghai Jiao Tong University  Shanghai 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