Abstract
In this paper, we experimentally study the saturation effect of rubidium atomic magnetic resonance. A pump beam is applied to create atomic spin polarization, a radio frequency (RF) magnetic field is used to drive the spin precession about a static magnetic field, and an off-resonant linearly polarized probe beam is applied to detect the spin dynamics based on the Faraday-rotation effect. When the RF magnetic field intensity becomes strong, a saturation effect is observed. We measure the resonant peak under strong RF magnetic field driving and obtain a saturation dip as an indication of the saturation effect. Furthermore, we show that the line-width of the saturation dip is much smaller than that of magnetic resonance. Accordingly, the sensitivity of the precision measurement based on the saturation dip can be significantly improved. The relations between the saturation dip in the resonant peak and the driving RF magnetic field intensity, as well as pumping intensity, are also studied in our experiment.
Highlights
The magnetic resonance technique plays an important role in precision measurement fields such as weak magnetic detection,1–3 atomic clocks, measurement of the fine structure constant, and testing the local Lorentz invariant.4,5 Since Kastler introduced the optical pumping in the 1950s, many experiments have been designed to explore the phenomenon of optical pumping and its application in fundamental measurement in atomic physics.6,7 Recently, with the development of laser techniques, various experiments based on magneto-optical resonance provide a method to measure atomic hyperfine level splitting,8 and weak magnetic fields.9Generally, experiments based on magneto-optical resonance measure the resonance in Zeeman splitting of the ground states
From Eq (7), the parameter A is linearly proportional to the Rabi frequency Ω when Ω2T1T2 ≪ 1
The behaviors of the parameters A and K are linearly proportional to the Rabi frequency Ω for an unsaturated system (Ω2T1T2 ≪ 1) and can be interpreted by the simple Bloch model
Summary
The magnetic resonance technique plays an important role in precision measurement fields such as weak magnetic detection, atomic clocks, measurement of the fine structure constant, and testing the local Lorentz invariant. Since Kastler introduced the optical pumping in the 1950s, many experiments have been designed to explore the phenomenon of optical pumping and its application in fundamental measurement in atomic physics. Recently, with the development of laser techniques, various experiments based on magneto-optical resonance provide a method to measure atomic hyperfine level splitting, and weak magnetic fields.9Generally, experiments based on magneto-optical resonance measure the resonance in Zeeman splitting of the ground states. The magnetic resonance technique plays an important role in precision measurement fields such as weak magnetic detection, atomic clocks, measurement of the fine structure constant, and testing the local Lorentz invariant.. With the development of laser techniques, various experiments based on magneto-optical resonance provide a method to measure atomic hyperfine level splitting, and weak magnetic fields.. In an atomic RF magnetometer, a circularly polarized pump beam is applied to create atomic spin polarization, and an oscillating RF magnetic field is used to induce resonant, coherent procession of polarized atomic spins when the oscillation frequency is in resonance with the Larmor frequency.. The performances of the atomic RF magnetometer are determined by many parameters such as pump beam intensity, the amplitude of the RF magnetic field, and temperature.. In an atomic RF magnetometer, a circularly polarized pump beam is applied to create atomic spin polarization, and an oscillating RF magnetic field is used to induce resonant, coherent procession of polarized atomic spins when the oscillation frequency is in resonance with the Larmor frequency. The magnetic field is measured by detecting the Larmor frequency of atomic spins. The performances of the atomic RF magnetometer are determined by many parameters such as pump beam intensity, the amplitude of the RF magnetic field, and temperature. The sensitivity of the atomic
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
