Integrated optical system for atom interferometers

Abstract

The invention discloses an integrated optical system for atom interferometers, and belongs to the technical field of precision measurement based on the atom interferometers. The system comprises a main body frame (10), a laser generation component (20), a modulating and beam splitting component (30), a frequency stabilizing component (40) and an optical fiber coupler component (50). The laser generation component (20), the modulating and beam splitting component (30), the frequency stabilizing component (40) and the optical fiber coupler component (50) are arranged on the main body frame (10).The laser generation component (20), the modulating and beam splitting component (30) and the optical fiber coupler component (50) interact with one another sequentially. The laser generation component (20) and the frequency stabilizing component (40) are in closed-loop interaction. The integrated optical system has the advantages that conflicts between functional needs and integration and between the functional needs and stability in existing atom interferometers are solved, and the problem of lack of measures to remotely adjust the light intensity proportion of double-frequency components,which form Raman light, in existing atom interferometer optical systems is also solved.

Description

technical field [0001] The invention belongs to the technical field of precision measurement based on atomic interferometer, and in particular relates to an integrated laser system for atomic interferometer. Background technique [0002] The atomic interferometer technology developed based on laser cooling and trapping neutral atom technology has been applied in the field of precision measurement of inertial physical quantities such as gravity, gravity gradient, and rotation. Briefly, the atom interferometer uses a pair of lasers with a frequency difference equal to the ultra-fine splitting of the two lower energy levels of the atom (or a beam of dual-frequency lasers, called Raman light in the field of atomic physics) to be cooled by the laser. Atoms (with extremely weak thermal motion) perform beam splitting, reflection, and beam combining operations, and write the space-dependent laser phase into the state superposition phase of the atom, and finally obtain the motion sta...

AI Technical Summary

Problems solved by technology

It can be seen that in the interference area of ​​the same size, the measurement sensitivity of the release-type atom interferometer is only 1 / 4 of that of the fountain-type atom interferometer

The removal of the two-dimensional pre-cooling device doubles the preparation speed of cold atoms, prolongs the measurement time, and also leads to a decrease in measurement sensitivity (the measurement sensitivity is inversely proportional to the square root of the total measurement time)

Therefore, the above simplified scheme is at the expense of the measurement sensitivity of the atomic interferometer, and it is difficult to meet the needs of high-sensitivity measurement

Images