Nonlinear frequency shift caused by asymmetry of the multipeak coherent population trapping resonance

被引：3
|
作者：
Tsygankov E.A. [1 ]
Chuchelov D.S. [1 ]
Vaskovskaya M.I. [1 ]
Vassiliev V.V. [1 ]
Zibrov S.A. [1 ]
Velichansky V.L. [1 ]
机构：
[1] Laboratory of Frequency Standards, P. N. Lebedev Physical Institute, The Russian Academy of Sciences, Leninsky Prospect 53, Moscow
来源：
Physical Review A | 2024年 / 109卷 / 05期
关键词：
'current - Coherent population trapping resonance - Diode-laser - Error signal - Frequency shift - Laser fields - Microwave field - Multi-peak structure - Multi-peaks - Nonlinear frequency;
D O I：
10.1103/PhysRevA.109.053703
中图分类号：
学科分类号：
摘要：
We study the coherent population trapping resonance induced by the radiation of a microwave-current-modulated diode laser. The situation is considered when a harmonic phase modulation of the microwave field is used to generate the error signal for the frequency stabilization of atomic clocks. We demonstrate that in this case the resonance acquires a multipeak structure. If it is asymmetric and the components of the multipeak structure are not fully resolved, then the resonance frequency nonlinearly depends on the laser field intensity. The peaks become separated at an increase in the frequency of the phase modulation, providing a linear dependence of the frequency on the intensity of the laser field. This theoretical prediction is confirmed experimentally. Other advantages of the high-frequency modulation regime are also discussed. © 2024 American Physical Society.
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