Nonlinear magneto-optic polarization rotation with intense laser fields
نویسندگان
چکیده
We have studied the nonlinear Faraday effect with intense linear polarized light in an optically thick atomic rubidium vapor. We demonstrate that the polarization rotation rate rotation angle per unit magnetic field, in the limit of low field has a maximum value as the intensity and density are increased. We also show that the optimal sensitivity of an optical magnetometer based on this system reaches a saturation value as the intensity and density are increased.
منابع مشابه
Nonlinear magneto-optical rotation of elliptically polarized light
We predict theoretically and demonstrate experimentally an ellipticity-dependent nonlinear magneto-optic rotation of elliptically polarized light propagating in a medium with atomic coherence. We show that this effect results from hexadecapole and higher-order moments of the atomic coherence, and is associated with an enhancement of Kerr and higher-order nonlinearities accompanied by suppressio...
متن کاملSensitive optical atomic magnetometer based on nonlinear magneto-optical rotation
A self-oscillating magnetometer based on nonlinear magneto-optical rotation using amplitude-modulated pump light and unmodulated probe light (AM-NMOR) in Rb has been constructed and tested towards a goal of airborne detection of 87 magnetic anomalies. In AM-NMOR, stroboscopic optical pumping via amplitude modulation of the pump beam creates alignment of the ground electronic state of the rubidi...
متن کاملNonlinear magneto-optical rotation in optically thick media
Resonant nonlinear magneto-optical rotation (NMOR) [1, 2] has been the subject of extensive theoretical and experimental studies because it provides a very sensitive way to measure magnetic fields (see, e.g., Ref. [3]). While NMOR experiments are usually carried out with vapor samples of moderate optical thickness (no more than ∼ 2 absorption lengths), the intense research of recent years on el...
متن کاملChopped nonlinear magneto-optic rotation: A technique for precision measurements
We have developed a technique for precise measurement of small magnetic fields using nonlinear magneto-optic rotation (NMOR). The technique relies on the resonant laser beam being chopped. During the on time, the atoms are optically pumped into an aligned ground state (Δm= 2 coherence). During the off time, they freely precess around the magnetic field at the Larmor frequency. If the on-off mod...
متن کاملخواص نوری- مغناطیسی و ضرایب اپتیکی لایههای نازک منگنز-کبالت
Having precise hysterics loop of thin ferroelectric and ferromagnetic layers for optical switching and optical storages are important. A hysterieses loop can be achieved from a phenomenon call the magneto-optic effect. The magneto-optic effect is the rotation of a linear polarized electromagnetic wave propagated through a ferromagnetic medium. When light is transmitted through a layer of magnet...
متن کامل