{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T15:55:56Z","timestamp":1790870156277,"version":"4.1.0"},"reference-count":33,"publisher":"Optica Publishing Group","issue":"29","license":[{"start":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T00:00:00Z","timestamp":1790812800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T00:00:00Z","timestamp":1790812800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"name":"National Natural Science Foundation of China","award":["U2330116"],"award-info":[{"award-number":["U2330116"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Appl. Opt."],"published-print":{"date-parts":[[2026,10,10]]},"abstract":"<jats:p>Focal zooming is a critical technique for direct-drive inertial confinement fusion (ICF). In this paper, we propose a dual-beamline electro-optic (EO) continuous focal-zooming scheme for KrF laser drivers, capable of delivering nanosecond-scale response and continuously tunable focal-spot diameters over a wide range. In each beamline, wavefront modulation by an EO crystal enables continuous variation of the focal-spot diameter, while switching between the two beamlines extends the overall zooming range beyond the capability of a single element. Numerical simulations demonstrate that the proposed scheme achieves an approximately threefold continuous spot compression while maintaining a well-defined flat-top focal profile and excellent irradiation uniformity within 1% root-mean-square (RMS) nonuniformity. This work provides a viable approach for dynamic irradiation control and enhanced laser\u2013target coupling in high-power KrF laser drivers.<\/jats:p>","DOI":"10.1364\/ao.609961","type":"journal-article","created":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T16:00:10Z","timestamp":1787673610000},"page":"10016","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Dual-beamline electro-optic continuous focal\u00a0zooming for KrF laser drivers"],"prefix":"10.1364","volume":"65","author":[{"given":"Qijun","family":"Chen","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/011ashp19","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4723-9433","authenticated-orcid":true,"given":"WenYa","family":"Chen","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/011ashp19","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bin","family":"Zhang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/011ashp19","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7650-3566","authenticated-orcid":true,"given":"Zheqiang","family":"Zhong","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/011ashp19","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,10,1]]},"reference":[{"key":"ao-65-29-10016-R1","doi-asserted-by":"publisher","first-page":"3662","DOI":"10.1063\/1.332599","type":"journal-article","volume":"54","author":"Skupsky","year":"1983","journal-title":"J. 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