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Lett."],"published-print":{"date-parts":[[2026,7,15]]},"abstract":"<jats:p>\n                    We report on the realization and comprehensive characterization of a single-frequency Cr\n                    <jats:sup>2+<\/jats:sup>\n                    :ZnSe laser tunable from 2350 to 2750\u2009nm, with optimized performance near 2689\u2009nm, in coincidence with the R(0) transition in the 1\u20130 rovibrational band of the hydrogen deuteride (HD) molecule. The laser is pumped by an amplified single-frequency laser at 1560\u2009nm, and it is based on a compact linear cavity with a 2-GHz free spectral range. It delivers a maximum output power of 30 mW with an emission linewidth &lt;1.1\u2009MHz over a 1\u2009ms integration time and a relative intensity noise as low as 0.12% in an integration bandwidth from 1\u2009Hz to 100\u2009MHz. The emission frequency can be finely tuned over more than 5\u2009GHz using a fast piezoelectric actuator.\n                  <\/jats:p>","DOI":"10.1364\/ol.605360","type":"journal-article","created":{"date-parts":[[2026,6,22]],"date-time":"2026-06-22T14:00:09Z","timestamp":1782136809000},"page":"3878","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["<b>Single-frequency Cr:ZnSe laser near 2.689<\/b>\n                    \u00b5\n                    <b>m for high-resolution HD molecule spectroscopy<\/b>"],"prefix":"10.1364","volume":"51","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-0295-7228","authenticated-orcid":true,"given":"Antonio","family":"Caruso","sequence":"first","affiliation":[{"name":"Politecnico di Milano"},{"name":"Consiglio Nazionale delle Ricerche"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9160-8895","authenticated-orcid":true,"given":"Dario","family":"Giannotti","sequence":"additional","affiliation":[{"name":"Politecnico di Milano"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8663-6138","authenticated-orcid":true,"given":"Francesco","family":"Canella","sequence":"additional","affiliation":[{"name":"Consiglio Nazionale delle Ricerche"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weibo","family":"Wu","sequence":"additional","affiliation":[{"name":"Politecnico di Milano"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Niccol\u00f2 S.","family":"Barberio","sequence":"additional","affiliation":[{"name":"Politecnico di Milano"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roberto","family":"Aiello","sequence":"additional","affiliation":[{"name":"Consiglio Nazionale delle Ricerche, c\/o Comprensorio Olivetti"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9971-406X","authenticated-orcid":true,"given":"Pasquale","family":"Maddaloni","sequence":"additional","affiliation":[{"name":"Consiglio Nazionale delle Ricerche, c\/o Comprensorio Olivetti"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2673-6983","authenticated-orcid":true,"given":"Paolo","family":"Laporta","sequence":"additional","affiliation":[{"name":"Politecnico di Milano"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4388-1421","authenticated-orcid":true,"given":"Gianluca","family":"Galzerano","sequence":"additional","affiliation":[{"name":"Consiglio Nazionale delle Ricerche"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,7,7]]},"reference":[{"key":"ol-51-14-3878-R1","doi-asserted-by":"publisher","first-page":"36","DOI":"10.1016\/j.jms.2011.01.006","type":"journal-article","volume":"267","author":"Kassi","year":"2011","journal-title":"J. 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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"}]}}