Differentially detected coherent population trapping resonances excited by orthogonally polarized laser fields
V Shah, Svenja A. Knappe, Michael Rosenbluh, John E. Kitching
We demonstrate the excitation and low-noise detection of coherent population trapping (CPT) resonances with two modulated optical fields with orthogonal circular polarizations. When a microwave phase delay of λ/4 is introduced in the optical path of one of the fields, the difference in the power transmitted through the cell in each polarization shows a narrow, dispersive resonance that can be used, for example, to stabilize the frequency of an external oscillator. The differential detection allows a high degree of suppression of laser-induced noise.
atomic clock, coherent population trapping, differential detection, magnetometer, optical pumping
, Knappe, S.
, Rosenbluh, M.
and Kitching, J.
Differentially detected coherent population trapping resonances excited by orthogonally polarized laser fields, Optics Express, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50265
(Accessed December 4, 2023)