Speaker
Shira Jackson
(University of Toronto)
Description
We report on progress towards the construction of an optical atomic clock based on the $4s^{2}\,^{1}S_{0}\rightarrow4s3d\,^{1}D_{2}$ two-photon transition in $^{40}\mathrm{Ca}$ atoms. Two-photon transitions are inherently Doppler and recoil free, which eliminates the need for tight confinement of the atoms during interrogation. This allows for a simplified design that can be made robust, compact and portable. A compact magneto-optical trap for calcium atoms is constructed with 423 nm external cavity diode lasers. Two portable ultra-stable lasers at 915 nm, with linewidths below 50 Hz, have been developed for interrogation of the two-photon clock transition.
Authors
Shira Jackson
(University of Toronto)
Shreyas Potnis
(University of Toronto)
Amar Vutha
(University of Toronto)
