![\"\"](\"http:\/\/people.williams.edu\/pmajumde\/files\/2010\/05\/polarimeteroptics.jpg\" "\\"polarimeteroptics\\"")
<\/a><\/p>\npolarimeter optics and thallium vapor cell furnace<\/p>\n
We also produce samples of our heavy metal, Group IIIA atoms using heated \u00a0quartz vapor cells. \u00a0Several experiments have been completed in thallium using diode laser systems. \u00a0First, an infrared diode laser system at 1283 nm was used to measure the ratio of\u00a0E2 to M1 quantum mechanical transition amplitudes<\/a> in the 6P1\/2 – 6P3\/2 ‘forbidden’ transition using transmission as well as Faraday rotation spectroscopy. \u00a0We also used the same frequency-doubled diode laser system at 378 nm to measure\u00a0hyperfine structure and isotope shift<\/a> within the 6P1\/2 – 7S1\/2 E1 transition in thallium.<\/p>\n In the foreground of this photo, one can see a typical quartz vapor cell. \u00a0Long empty quartz tubes extend from the cell face well outside of the oven body to eliminate the noise produced by convection currents of hot air near the oven entrance and exit apertures.<\/p>\n GaN diode lasers<\/strong><\/p>\n Recently, with the advent of GaN blue\/UV diode lasers, we have pursued spectroscopy of indium, where a diode laser system at 410 nm drives the ground-state 5P1\/2-6S1\/2 transition. \u00a0We also have a GaN system operating at 378 nm, producing light for our thallium experiments WITHOUT the need for frequency-doubling! \u00a0Below you can see the blue\/violet beam path, as well as the red glow from the small indium furnace, heated to about 800 degrees C for sufficient vapor pressure.<\/p>\n Toptica DL100 system @410 nm.<\/p>\n We also have in our laboratory a GaN-based external cavity laser system (Sacher Lasertechnik) operating at 378 nm for thallium spectroscopy.<\/p>\n","protected":false},"excerpt":{"rendered":" II. \u00a0Vapor cell spectroscopy and blue\/UV diode lasers polarimeter optics and thallium vapor cell furnace We also produce samples of our heavy metal, Group IIIA atoms using heated \u00a0quartz vapor cells. \u00a0Several experiments have been completed in thallium using diode … Continue reading <\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n