Single-transmission peak atom light filter and light filtering method

Abstract

The invention provides a single-transmission peak atom light filter and a method using the light filter for light filtering. The atom light filter comprises an alkali metal atomic bubble, two polarizing films, a magnetic field source and a temperature control system, wherein the alkali metal atomic bubble is filled with inert gas. When the atom light filter is used for the light filtering, polarizing directions of the two polarizing films can be firstly adjusted to be mutually vertical, and light selection can be carried out for incident lights; the temperature control system can be utilized for controlling the temperature of the alkali metal atomic bubble; and then light rotation can be carried out for the incident lights by utilizing a faraday anomalous dispersion effect of alkali metal atom in a uniform magnetic field, and a single-transmission peak light spectrum can be obtained. According to the invention, the faraday anomalous dispersion effect which is realized after the inert gas and alkali metal gas are mixed is utilized, the design principle is clear, the structure is simple, the working is stable, and the laser performance is high.

Description

technical field [0001] The invention belongs to the field of atomic light filtering technology and laser technology, and relates to an atomic light filter, in particular to a ground-state single-transmission peak atomic light filter and a method for using the light filter to perform light filtering. Background technique [0002] Due to its narrow linewidth, specific frequency selection, small size, compact structure, and long-term stability, atomic filters are widely used in atmospheric laser communication, space communication, laser spectroscopy, laser technology, quantum information, metrology, biology, medicine, and basic It has a wide range of applications in experiments and so on. At present, most of the atomic filters made in the world using the atomic ground states of alkali metals such as cesium, rubidium, and potassium use pure element bubbles filled with no buffer gas, and the obtained transmission spectra are all multi-peaked. In order to obtain an atomic filter ...

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Problems solved by technology

In addition, some atomic optical filters use the transition between atomic excited states. Although a single transmission peak can be obtained, it needs one or several pump lasers and other equipment to support it, and the cost is very high; the pump laser frequency stabilization system is not easy to do. Long-term stability, and the equipment is large, inconvenient to carry and move

In general, in the prior art, the equivalent noise of the small-volume atomic optical filter is too wide, while the atomic optical filter with narrow equivalent noise is large in size and high in cost, and cannot well meet some higher requirements or specific requirements. Required applications require

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