Atomic grating reflection coefficient and phase regulation and control method

Abstract

The invention relates to an atomic grating reflection coefficient and phase regulation and control method which is characterized in that regulation and control of atomic grating reflection coefficientand phase are realized by controlling the parameter of laser in the atomic grating formation process, wherein regulation and control of the atomic grating reflection coefficient are realized by controlling the acting duration of the laser and the atom, and regulation and control of the grating phase are realized by controlling the phase shift caused by the frequency change of the laser. Continuous and accurate regulation of the atomic grating reflection coefficient and the atomic grating phase can be realized, and independent regulation of the atomic grating reflection coefficient and phase can be realized. Besides, the movement of the mechanical structure is not involved so that the generated vibration, the hysteresis error and the return error can be avoided, and the method has the advantages of being simple and convenient in regulation and control method, continuous in regulation and control, high in regulation and control accuracy and high in regulation repeatability and can be used for regulation and control of the atomic grating in precise measurement.

Description

technical field [0001] The invention relates to the technical field of atomic optical instruments, in particular to a method for regulating the reflection coefficient and phase of an atomic grating, which can be used for regulating the atomic grating in precision measurement. Background technique [0002] Photonic crystals are periodic nanostructures that can manipulate photons like semiconductors manipulate electrons, and have been vigorously developed in the past 30 years. According to different structural characteristics, photonic crystals can be divided into one-dimensional, two-dimensional and three-dimensional. Among them, one-dimensional photonic crystals, usually referring to Bragg gratings, are usually fabricated by nanofabrication techniques, including etching and self-assembly, or a combination of the two methods. Among the one-dimensional Bragg gratings, gratings with a grating period close to the visible to near-infrared range have extensive and important appli...

AI Technical Summary

Problems solved by technology

In terms of the control of the reflection coefficient of the grating, the reflection coefficient of the grating can be adjusted by changing the time interval T of the first and second standing wave pulses, but at the same time, the evolution of the atoms between the two pulse intervals also changes, resulting in the The phase change of the grating, which is inconsistent with the requirement that the reflection coefficient and phase of the grating can be adjusted separately in practical applications

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