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Express"],"published-print":{"date-parts":[[2026,1,26]]},"abstract":"<jats:p>\n                    Photopumping of K\/Xe vapor mixtures over a continuous spectral region &gt;1.2 THz (&gt;40 cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) in breadth yields lasing on the D\n                    <jats:sub>1<\/jats:sub>\n                    line of atomic potassium (4\n                    <jats:italic>p<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    <jats:italic>P<\/jats:italic>\n                    <jats:sub>1\/2<\/jats:sub>\n                    \u2009\u2192\u20094\n                    <jats:italic>s<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    <jats:italic>S<\/jats:italic>\n                    <jats:sub>1\/2<\/jats:sub>\n                    ) by populating the dissociative B\n                    <jats:italic\/>\n                    <jats:sup>2<\/jats:sup>\n                    \u03a3\n                    <jats:sub>1\/2<\/jats:sub>\n                    <jats:sup>+<\/jats:sup>\n                    or weakly bound A\n                    <jats:sup>2<\/jats:sup>\n                    \u03a0\n                    <jats:sub>3\/2<\/jats:sub>\n                    states of the KXe excimer molecule. Subsequent dissociation of the excited molecule populates the 4\n                    <jats:italic>p<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    <jats:italic>P<\/jats:italic>\n                    <jats:sub>3\/2<\/jats:sub>\n                    and 4\n                    <jats:italic>p<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    <jats:italic>P<\/jats:italic>\n                    <jats:sub>1\/2<\/jats:sub>\n                    levels of the K atom, the latter of which is the upper level for the 769.9 nm resonance line laser. Lasing over \u223c60% of the 57.7 cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    gap lying between the spin-orbit split 4\n                    <jats:italic>p<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    <jats:italic>P<\/jats:italic>\n                    <jats:sub>3\/2<\/jats:sub>\n                    \u2009\u2212\u20094\n                    <jats:italic>p<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    <jats:italic>P<\/jats:italic>\n                    <jats:sub>1\/2<\/jats:sub>\n                    states has been achieved, and single-pulse energies up to \u223c35 \u00b5J have been obtained when pumping the K\/Xe mixture in the vicinity of the D\n                    <jats:sub>2<\/jats:sub>\n                    line (766.5 nm) in a single-pass pumping configuration of the resonator. The quantum efficiency (&gt;99%) and broad pump-acceptance bandwidth afforded by the KXe excimer lend this hybrid atomic\/molecular photodissociation laser to pumping with free-running semiconductor laser arrays.\n                  <\/jats:p>","DOI":"10.1364\/oe.583458","type":"journal-article","created":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T05:00:08Z","timestamp":1767848408000},"page":"3391","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Near-infrared (769\u2013770 nm) K atomic laser optically pumped through KXe excimer intermediate states"],"prefix":"10.1364","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4666-0584","authenticated-orcid":true,"given":"Kavita","family":"Desai Kabelitz","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/047426m28","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrey E.","family":"Mironov","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/047426m28","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Present Address: Xcimer Energy, Inc."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Gary Eden","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/047426m28","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,1,23]]},"reference":[{"key":"oe-34-2-3391-R1","doi-asserted-by":"publisher","first-page":"107383","DOI":"10.1016\/j.jqsrt.2020.107383","type":"journal-article","volume":"259","author":"Du","year":"2021","journal-title":"J. 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