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A kind of atomic filter and filter method based on spin exchange pumping

A technology of atomic optical filter and spin exchange, which is applied in the direction of lasers, phonon exciters, laser components, etc., can solve the problems of wide transmission spectral bandwidth and low atomic polarizability, so as to increase atomic density and improve transmission The effect of passing rate and facilitating temperature rise

Active Publication Date: 2022-05-10
SUN YAT SEN UNIV
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Problems solved by technology

[0009] This application provides an atomic optical filter and filtering method based on spin exchange pumping, which is used to solve the technical problems of low atomic polarizability and large transmission spectral bandwidth in existing atomic optical filters

Method used

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  • A kind of atomic filter and filter method based on spin exchange pumping
  • A kind of atomic filter and filter method based on spin exchange pumping
  • A kind of atomic filter and filter method based on spin exchange pumping

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Embodiment Construction

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0038]For ease of understanding, see figure 1 , an atomic filter based on spin-exchange pumping provided by the present application, comprising: a pump source 1, a circular polarization conversion module 2, a line light source module 3, an atomic vapor pool 4, a TEC heating module 5, a first cell Glan-Thomson prism 6 and second Glan-Thomson prism 7;

[0039] The ...

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Abstract

The present application discloses an atomic optical filter and filtering method based on spin exchange pumping, by setting the volume percentage of alkali metal filter atoms and the alkali metal pumping atoms to 99-99.9%: 0.1-1% , so that the proportion of the alkali metal pumped atoms is small, thereby increasing the polarizability, and facilitating the temperature rise, and the temperature rise can increase the saturated vapor pressure of the atomic vapor pool, which also increases the atomic density, thereby further improving The polarizability of the atoms, thereby increasing the transmittance of the filter. In addition, the proportion of the alkali metal pump atoms in the atomic vapor pool is very small, which makes the absorption of the pump light very small, and the indirect polarization of the alkali metal working atoms through the alkali metal pump atoms can significantly reduce the pump light power. Requirements, thereby reducing the transmission spectral bandwidth of the atomic filter.

Description

technical field [0001] The present application relates to the technical field of atomic optical filters, in particular to an atomic optical filter and a filtering method based on spin exchange pumping. Background technique [0002] In free space, laser information technology is widely used, such as free space optical communication, underwater communication, remote sensing and laser radar. However, when the laser signal is transmitted in free space, after being absorbed, scattered, and dispersed by media such as the atmosphere or sea water, the signal-to-noise ratio of the finally received signal light is relatively low. Even in the inter-satellite transmission, the signal-to-noise ratio of the signal received by the spaceborne terminal is relatively poor due to the broadband background radiation of sunlight. And some optical systems, such as lidar, use the scattered echo signal of the target as a beacon, so the signal-to-noise ratio of the received optical signal is even wo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/10H01S3/227H01S3/094
CPCH01S3/10061H01S3/227H01S3/094
Inventor 刘双强
Owner SUN YAT SEN UNIV
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