{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T03:42:19Z","timestamp":1792381339338,"version":"4.4.0"},"reference-count":12,"publisher":"IOP Publishing","issue":"6R","license":[{"start":{"date-parts":[[2000,6,1]],"date-time":"2000-06-01T00:00:00Z","timestamp":959817600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/page\/copyright"},{"start":{"date-parts":[[2000,6,1]],"date-time":"2000-06-01T00:00:00Z","timestamp":959817600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["Jpn. J. Appl. Phys."],"published-print":{"date-parts":[[2000,6,1]]},"abstract":"<jats:p> \n  We demonstrate a miniaturized blue laser (5\u00d712\u00d71.5 mm<jats:sup>3<\/jats:sup>) using second harmonic generation (SHG), which \n  consists of a quasi-phase-matched (QPM)-SHG waveguide device on an \n  x-cut Mg-doped LiNbO<jats:sub>3<\/jats:sub> substrate and a tunable \n  distributed-Bragg-reflector (DBR) laser diode. By using the QPM-SHG \n  waveguide device on an x-cut substrate, efficient optical coupling \n  was realized without a half-wave plate, and the maximum coupling \n  efficiency of 75% was achieved. The blue light power of 2 mW was \n  generated for the fundamental coupling power of 20 mW, which agreed with a \n  conversion efficiency of 10%. The mechanical stability of the \n  planar-type butt-coupled SHG blue laser was examined, where the \n  coupling efficiency was maintained constantly under the change of \n  module temperature and the temperature cycle test from 10 to \n  60\u00b0C. We succeeded in downsizing the SHG blue laser to \n  0.1 cm<jats:sup>3<\/jats:sup>, which is sufficiently small for its application to \n  optical disk systems. \n  <\/jats:p>","DOI":"10.1143\/jjap.39.3416","type":"journal-article","created":{"date-parts":[[2002,10,1]],"date-time":"2002-10-01T23:08:06Z","timestamp":1033513686000},"page":"3416","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":24,"title":["Miniaturized Blue Laser using Second Harmonic Generation"],"prefix":"10.35848","volume":"39","author":[{"given":"Yasuo","family":"Kitaoka","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Toshifumi","family":"Yokoyama","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kiminori","family":"Mizuuchi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazuhisa","family":"Yamamoto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","reference":[{"key":""},{"key":"","doi-asserted-by":"publisher","first-page":"568","DOI":"10.1143\/JJAP.31.568","volume":"31","year":"1992","journal-title":"Jpn. 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