5 papers
Strontium transition frequency measurements assisted by a photonic grating chip
Jaewhan Lee, Hyun Gyung Lee, Won-Kyu Lee +15
We measure the absolute frequency of the transition in strontium using two methods: fluorescence spectroscopy of a thermal atomic beam sourc…
FPGA-based disturbance-observer servo for broadband noise suppression in laser frequency stabilization
Meung Ho Seo, Jae Hoon Lee, Young-Ho Park +7
We have demonstrated broadband frequency-noise suppression in a laser stabilization system by augmenting a conventional proportional-integral-derivative (PID) controller with a dig…
High-stability offset-frequency locking of two lasers using a balanced filter discriminator
Sang Eon Park, Meung Ho Seo, Young-Ho Park +6
We demonstrate a high-stability laser offset-frequency locking technique based on a balanced filter discriminator. The beat note between two 852 nm external-cavity diode lasers is…
Motion-selective coherent population trapping for subrecoil cooling of optically trapped atoms outside the Lamb-Dicke regime
Hyun Gyung Lee, Sooyoung Park, Meung Ho Seo +1
We propose a scheme that combines velocity-selective coherent population trapping (CPT) and Raman sideband cooling (RSC) for subrecoil cooling of optically trapped atoms outside th…
Motion-selective coherent population trapping by Raman sideband cooling along two paths in a configuration
Sooyoung Park, Meung Ho Seo, Ryun Ah Kim +1
We report our experiment on sideband cooling with two Raman transitions in a configuration that allows selective coherent population trapping (CPT) of the motional ground state…