Single-transmission peak atom light filter and light filtering method

Abstract

The invention provides a ground state 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 at 30 DEG C to 120 DEG C; 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 filtering technology and laser technology, and relates to an atomic filter, in particular to a single transmission peak atomic filter and a method for filtering light using the filter. Background technique [0002] Due to its narrow line width, specific frequency selection, small size, compact structure, and long-term stability, atomic filters are used in atmospheric laser communications, space communications, laser spectroscopy, laser technology, quantum information, metrology, biology, medicine, and basic Experiments and other aspects are widely used. At present, most of the atomic filters made internationally using the atomic ground states of alkali metals such as cesium, rubidium, and potassium use pure element bubbles without buffer gas filling, and the obtained transmission spectra are all multi-peak. In order to obtain an atomic filter with a single transmission peak, the device structure is more complica...

AI Technical Summary

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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