Atomic cooling optical device based on all-solid-state continuous wave alexandrite laser

Abstract

The invention relates to an atomic cooling optical device based on an all-solid-state continuous wave alexandrite laser, which comprises an alexandrite laser, a light beam collimating and expanding lens group, a first 780nm half-wave plate, a first polarization splitting prism, an acousto-optic modulator, an electro-optic modulator, and an Rb polarization spectrum frequency stabilization module, wherein laser output by the alexandrite laser sequentially passes through the light beam collimating and expanding lens group, the first 780nm half-wave plate and the first polarization splitting prismand then is decomposed, one part of light enters the Rb polarization spectrum frequency stabilization module to stabilize the frequency of the alexandrite laser, and the other part of light passes through the acousto-optic modulator and the electro-optic modulator. High-power 780nm single-frequency linear polarization laser output is generated by the alexandrite laser, frequency stabilization isperformed on the alexandrite laser by utilizing the Rb atomic polarization spectrum frequency stabilization module, and output light is subjected to frequency shift and modulation through the acousto-optic modulator and the electro-optic modulator to generate cooling light and re-pumping light.

Description

technical field [0001] The invention belongs to the technical field of laser cooling and trapping of atoms, and relates to an optical device for cooling rubidium atoms, in particular to an optical device for cooling atoms based on an all-solid-state continuous wave chrysoberyl laser. Background technique [0002] The laser cooling and trapping technology of atoms and its application are rapidly developing research fields in recent decades. It provides new technical means and is also the premise and basis for the development of precision instruments such as atomic frequency standards and atomic interferometers. [0003] Currently, optical systems for cooling and trapping rubidium (Rb) atoms are mainly based on semiconductor lasers and fiber lasers. Among them, the output power of the 780nm narrow-linewidth semiconductor laser is generally on the order of tens of mW. It is necessary to use an amplifier to amplify the laser power to meet the power requirements of subsequent co...

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Problems solved by technology

Among them, the output power of the 780nm narrow-linewidth semiconductor laser is generally on the order of tens of mW. It is necessary to use an amplifier to amplify the laser power to meet the power requirements of subsequent cooling light and detection light. It is not easy to realize the miniaturization of the optical path; based on fiber lasers The scheme usually uses a 1560nm narrow linewidth laser as a seed source, and then uses a frequency doubling crystal to generate a 780nm laser after passing through an erbium-doped fiber amplifier. This scheme is easier to obtain a high-power 780nm laser, but it requires nonlinear optical frequency conversion, which is relatively cumbersome

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