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Atomic Frequency Reference Based on 4S 1/2→4P1/2 Transitions in Potassium Vapor Placed in a Nanocell
Abstract
Sub-Doppler resonances formed by scanning the laser frequency in the region of the 4S1/2→4P1/2 transition at a wavelength of 770 nm in K atomic vapors placed in a nanocell were studied. For atomic vapor thicknesses of L = λ/2 = 385 nm and L = λ = 770 nm, sub-Doppler resonances are formed in the transmission spectrum, located at the unshifted atomic transitions Fg = 1, 2→Fe = 1, 2. The resonance amplitudes observed in the nanocell are proportional to the probability amplitudes of the corresponding transitions. It is shown that a nanocell with a vapor thickness of L = λ = 770 nm can be used as a convenient frequency reference, tied to the unshifted frequencies of the atomic transitions. The advantages of the proposed frequency reference over a commonly used frequency reference based on saturated absorption techniques are demonstrated.
About the Author
A. Sargsyan
Institute for Physical Research of the National Academy of Sciences of Armenia
Armenia
Armenia
Ashtarak
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Review
For citations:
Sargsyan A. Atomic Frequency Reference Based on 4S 1/2→4P1/2 Transitions in Potassium Vapor Placed in a Nanocell. Zhurnal Prikladnoii Spektroskopii. 2026;93(2):159-164. (In Russ.)
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