Optics and Photonics Society of Iran

High precision measurement of magnetic fields, have attracted great recent interest in practical applications. Optical detection of Zeeman splitting of alkali metal vapors, is one of the best possible techniques for this purpose. In this technique, optical pumping is used creating spin polarization, and an associated macroscopic magnetization in an alkali vapor cell. A weak oscillating magnetic field at frequency RF, drives transitions between neighboring Zeeman-split sublevels, thereby destroying the polarization. Resonance absorption is expected when the energy of the applied alternating field matches the Zeeman energy. In this paper, Optical absorption coefficient of rubidium vapor cell has been investigated by sweeping the RF field frequency to obtain the amplitude of static magnetic field and associated Zeeman splitting