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Lett."],"published-print":{"date-parts":[[2026,5,1]]},"abstract":"<jats:p>A dispersion-tuned mode-locked optoelectronic oscillator (OEO) is demonstrated for the first time, to the best of our knowledge. A flat and highly chirped microwave photonic filter with a large bandwidth within the OEO, which is essential for dispersion tuning, is realized by employing a sliced amplified spontaneous emission (ASE) source and a 1.1\u2009km dispersion-compensating fiber (DCF). A recirculating loop is used to form a comb filter that ensures single-mode oscillation in the free-running state and maintains the sidemode suppression ratio under harmonic mode-locking. As the modulation frequency is swept from 10.3122\u2009MHz to 10.3042\u2009MHz, corresponding to approximately 58-order harmonic mode-locking and matched to the comb-filter period, the OEO output frequency exhibits discrete tuning from 4.08\u2009GHz to 5.08\u2009GHz, with a total of four distinct frequency steps. This work opens up a new approach to frequency control in OEOs.<\/jats:p>","DOI":"10.1364\/ol.581159","type":"journal-article","created":{"date-parts":[[2026,3,6]],"date-time":"2026-03-06T11:00:06Z","timestamp":1772794806000},"page":"2416","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Dispersion-tuned mode-locked optoelectronic oscillator"],"prefix":"10.1364","volume":"51","author":[{"given":"Zhuoran","family":"Wang","sequence":"first","affiliation":[{"name":"McGill University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5215-3987","authenticated-orcid":true,"given":"Santiago","family":"Bernal","sequence":"additional","affiliation":[{"name":"McGill University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David V.","family":"Plant","sequence":"additional","affiliation":[{"name":"McGill University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3760-4719","authenticated-orcid":true,"given":"Lawrence R.","family":"Chen","sequence":"additional","affiliation":[{"name":"McGill University"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"285","published-online":{"date-parts":[[2026,4,17]]},"reference":[{"key":"ol-51-9-2416-R1","doi-asserted-by":"publisher","first-page":"9299","DOI":"10.1364\/OE.14.009299","type":"journal-article","volume":"14","author":"Yamashita","year":"2006","journal-title":"Opt. 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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"}]}}