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Thus, wavelength\u2010tunable pulsed lasers have attracted significant attention in fields such as wavelength division multiplexing, precision material processing, and spectroscopic analysis. Here, a polarization\u2010sensitive Au\u2010nanorod metasurface has been proposed that integrates saturable absorption with wavelength\u2010tuning capabilities. By fabricating this metasurface structure on the facet of the fiber, known as a metafiber, low\u2010loss coupling between the metasurface and the fiber laser system is achieved. In experiments, we have successfully demonstrated Q\u2010switched pulse, achieving precise control over pulse width (13.5\u201329.8\u00a0\u03bcs), repetition rate (15.3\u201343.7\u00a0kHz), and pulse energy (15.2\u201330.7\u00a0nJ) through meticulous adjustment of the pump power. Notably, by modulating the input polarization state, the response wavelength of the metafiber can be effectively controlled, enabling wavelength\u2010tunable pulsed laser output within a 5\u2010nm range. This achievement introduces a new concept and provides a viable solution for the design and development of next\u2010generation compact, high\u2010efficiency, and multifunctional laser systems.<\/jats:p>","DOI":"10.1002\/nap2.70278","type":"journal-article","created":{"date-parts":[[2026,8,28]],"date-time":"2026-08-28T11:43:38Z","timestamp":1787917418000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Polarization\u2010Controlled Wavelength\u2010Tunable Pulsed Laser Based on Metafiber"],"prefix":"10.1002","volume":"15","author":[{"given":"Chenxi","family":"Zhang","sequence":"first","affiliation":[{"name":"Hangzhou International Innovation Institute Beihang University  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-4034-1226","authenticated-orcid":false,"given":"Zanzhu","family":"Pan","sequence":"additional","affiliation":[{"name":"Key Laboratory of 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