2025/05/04 by E. A. Tsygankov, Tsygankov, E. A., D. S. Chuchelov +9 · 1 citation
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Photonic and Optical Devices #Semiconductor Lasers and Optical Devices
paper · pdf · doi:10.48550/arxiv.2505.02219
openalex publication_date 2025/05/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report on the possibility to obtain a high-quality inverted Doppler-free resonance in D1 line of alkali-metal atoms in the single-frequency regime. The counter-propagating optical fields with linear and mutually orthogonal polarizations and the transition Fg=I+1/2 --> Fe=I-1/2 are proposed to the use. We establish the best possible nuclear spin value and the corresponding atomic isotope for this regime. Our experiment demonstrates that the resonance contrast-to-width ratio in the single-frequency regime is practically the same as in the dual-frequency regime, which simplifies the optical module to be used in compact optical clocks. The achieved short-term frequency stability is 3*10^(-13) at 1 s, which is comparable to results that can be obtained with the dual-frequency technique.