{"id":1570,"date":"2010-04-21T23:32:00","date_gmt":"2010-04-21T21:32:00","guid":{"rendered":"https:\/\/gqm.lpl.univ-paris13.fr\/?p=1570"},"modified":"2025-11-08T16:18:27","modified_gmt":"2025-11-08T15:18:27","slug":"optimized-loading-of-an-optical-dipole-trap-for-the-production-of-chromium-becs","status":"publish","type":"post","link":"https:\/\/gqm.lpl.univ-paris13.fr\/index.php\/2010\/04\/21\/optimized-loading-of-an-optical-dipole-trap-for-the-production-of-chromium-becs\/","title":{"rendered":"Optimized loading of an optical dipole trap for the production of\u00a0chromium BECs"},"content":{"rendered":"\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p>We analyse how the number of atoms in a chromium Bose\u2013Einstein condensate can be raised by a proper handling of the metastable state populations.<\/p>\n\n\n\n<p>Four laser diodes have been implemented to address the four levels that are populated during the MOT phase. The individual importance of each state is specified.<\/p>\n\n\n\n<p>To stabilize two of our laser diode, we have developed a simple ultrastable passive reference cavity whose long term stability is better than 1 MHz.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image aligncenter size-full has-custom-border is-style-rounded wp-duotone-unset-1\" id=\"wp-block-themeisle-blocks-image-5a8ed243\" style=\"margin-top:var(--wp--preset--spacing--20);margin-right:var(--wp--preset--spacing--20);margin-bottom:var(--wp--preset--spacing--20);margin-left:var(--wp--preset--spacing--20)\"><img loading=\"lazy\" decoding=\"async\" width=\"1875\" height=\"1875\" src=\"https:\/\/gqm.lpl.univ-paris13.fr\/wp-content\/uploads\/2025\/11\/Article-Optimized-loading.png\" alt=\"\" class=\"wp-image-1650\" style=\"border-style:none;border-width:0px;border-radius:10px\" srcset=\"https:\/\/gqm.lpl.univ-paris13.fr\/wp-content\/uploads\/2025\/11\/Article-Optimized-loading.png 1875w, https:\/\/gqm.lpl.univ-paris13.fr\/wp-content\/uploads\/2025\/11\/Article-Optimized-loading-300x300.png 300w, https:\/\/gqm.lpl.univ-paris13.fr\/wp-content\/uploads\/2025\/11\/Article-Optimized-loading-1024x1024.png 1024w, https:\/\/gqm.lpl.univ-paris13.fr\/wp-content\/uploads\/2025\/11\/Article-Optimized-loading-150x150.png 150w, https:\/\/gqm.lpl.univ-paris13.fr\/wp-content\/uploads\/2025\/11\/Article-Optimized-loading-768x768.png 768w, https:\/\/gqm.lpl.univ-paris13.fr\/wp-content\/uploads\/2025\/11\/Article-Optimized-loading-1536x1536.png 1536w\" sizes=\"auto, (max-width: 1875px) 100vw, 1875px\" \/><figcaption class=\"wp-element-caption\">Ultra-stable cavity set-up and detail of the mirrors fixing<\/figcaption><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>We report on a strategy to maximize the number of chromium atoms transferred from a magneto-optical trap into an optical trap through accumulation in metastable states via strong optical pumping.<br \/>\n<a href=\"https:\/\/doi.org\/10.48550\/arXiv.1004.3642\">arXiv:1004.3642 (2010)<\/a>  \/  <a href=\"https:\/\/doi.org\/10.1007\/s00340-010-4171-y\">Appl. Phys. B 102, 1 (2011)<\/a><\/p>\n","protected":false},"author":3,"featured_media":1650,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[18,63],"tags":[28,26,319,31,77,61,42],"class_list":["post-1570","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-article","category-chromium","tag-benjamin-pasquiou","tag-bruno-laburthe-tolra","tag-donatella-ciampini","tag-etienne-marechal","tag-gabriel-bismut","tag-laurent-vernac","tag-olivier-gorceix"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Optimized loading of an optical dipole trap for the production of\u00a0chromium BECs - Magnetic Quantum Gases<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gqm.lpl.univ-paris13.fr\/index.php\/2010\/04\/21\/optimized-loading-of-an-optical-dipole-trap-for-the-production-of-chromium-becs\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Optimized loading of an optical dipole trap for the production of\u00a0chromium BECs - Magnetic Quantum Gases\" \/>\n<meta property=\"og:description\" content=\"We report on a strategy to maximize the number of chromium atoms transferred from a magneto-optical trap into an optical trap through accumulation in metastable states via strong optical pumping. arXiv:1004.3642 (2010) \/ Appl. Phys. B 102, 1 (2011)\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gqm.lpl.univ-paris13.fr\/index.php\/2010\/04\/21\/optimized-loading-of-an-optical-dipole-trap-for-the-production-of-chromium-becs\/\" \/>\n<meta property=\"og:site_name\" content=\"Magnetic Quantum Gases\" \/>\n<meta property=\"article:published_time\" content=\"2010-04-21T21:32:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-08T15:18:27+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/gqm.lpl.univ-paris13.fr\/wp-content\/uploads\/2025\/11\/Article-Optimized-loading.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1875\" \/>\n\t<meta property=\"og:image:height\" content=\"1875\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Benjamin PASQUIOU\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin PASQUIOU\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/gqm.lpl.univ-paris13.fr\\\/index.php\\\/2010\\\/04\\\/21\\\/optimized-loading-of-an-optical-dipole-trap-for-the-production-of-chromium-becs\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gqm.lpl.univ-paris13.fr\\\/index.php\\\/2010\\\/04\\\/21\\\/optimized-loading-of-an-optical-dipole-trap-for-the-production-of-chromium-becs\\\/\"},\"author\":{\"name\":\"Benjamin PASQUIOU\",\"@id\":\"https:\\\/\\\/gqm.lpl.univ-paris13.fr\\\/#\\\/schema\\\/person\\\/edd1441f419c30858a44ed007fc1fc79\"},\"headline\":\"Optimized loading of an optical dipole trap for the production of\u00a0chromium BECs\",\"datePublished\":\"2010-04-21T21:32:00+00:00\",\"dateModified\":\"2025-11-08T15:18:27+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/gqm.lpl.univ-paris13.fr\\\/index.php\\\/2010\\\/04\\\/21\\\/optimized-loading-of-an-optical-dipole-trap-for-the-production-of-chromium-becs\\\/\"},\"wordCount\":97,\"publisher\":{\"@id\":\"https:\\\/\\\/gqm.lpl.univ-paris13.fr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/gqm.lpl.univ-paris13.fr\\\/index.php\\\/2010\\\/04\\\/21\\\/optimized-loading-of-an-optical-dipole-trap-for-the-production-of-chromium-becs\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/gqm.lpl.univ-paris13.fr\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/Article-Optimized-loading.png\",\"keywords\":[\"Benjamin Pasquiou\",\"Bruno Laburthe-Tolra\",\"Donatella Ciampini\",\"Etienne Mar\u00e9chal\",\"Gabriel Bismut\",\"Laurent Vernac\",\"Olivier Gorceix\"],\"articleSection\":[\"Article\",\"Chromium\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/gqm.lpl.univ-paris13.fr\\\/index.php\\\/2010\\\/04\\\/21\\\/optimized-loading-of-an-optical-dipole-trap-for-the-production-of-chromium-becs\\\/\",\"url\":\"https:\\\/\\\/gqm.lpl.univ-paris13.fr\\\/index.php\\\/2010\\\/04\\\/21\\\/optimized-loading-of-an-optical-dipole-trap-for-the-production-of-chromium-becs\\\/\",\"name\":\"Optimized loading of an optical dipole trap for the production of\u00a0chromium BECs - 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