2011/06/06 by A. M. Akulshin, B. V. Hall, V. Ivannikov +5 · 1 citation
Chemistry · Physics and Astronomy · #Advanced Fiber Laser Technologies #Atom (system on chip) #Atomic physics #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Doppler effect #Excitation #Fluorescence #Laser #Optics #Photon #Physics #Polarization (electrochemistry) #Quantum optics and atomic interactions #Two-photon excitation microscopy #physics.atom-ph
paper · pdf · doi:10.1088/0953-4075/44/21/215401
12 pages, 6 figures
arxiv created 2011/06/06 · openalex publication_date 2011/10/18 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate the excitation of the 5D5/2 level in Rb atoms using counter-propagating laser beams, which are nearly resonant to the one-photon 5S1/2 → 5P3/2 and 5P3/2 → 5D5/2 transitions, ensuring that a sum of the optical frequencies corresponds to the 5S1/2 → 5D5/2 transition. The excitation produced by two-photon and stepwise processes is detected via spontaneously emitted fluorescence at 420 nm arising from the 6P3/2 → 5S1/2 transition. The dependences of blue fluorescence intensity on atomic density and laser detuning from the intermediate 5P3/2 level have been investigated. The sensitivity of the frequency-detuned bi-chromatic scheme for atom detection has been estimated. A novel method for sum-frequency stabilization of two free-running lasers has been suggested and implemented using two-photon Doppler-free fluorescence and polarization resonances.