Method for realizing saturated absorption spectrum based on multiple reflections

Abstract

A method for realizing a saturated absorption spectrum based on multiple reflections is realized through the intensive multiple reflections of laser in an atomic vapor chamber. A pair of right-and-left staggered reflecting devices is placed on the front side and the rear side of the atomic vapor chamber, the normal directions of the pair of reflecting devices have at a certain angle in a horizontal direction, and the laser which goes through the atomic vapor chamber and is incident on the reflecting devices are multiply reflected in the reflecting devices; and the angle of the incident laser and the included angle between the two reflecting devices are adjusted to make reflected lights become dense from sparsity, so forward lights and reverse lights in the dense area are intersected and overlapped in the atomic vapor chamber. Normal incident pump lights and reversely incident absorption lights exist in the overlapping area, so the saturated absorption spectrum of a reference gas in theatomic vapor chamber is generated. The method can simplify a device for the saturated absorption spectrum, makes a small gas chamber work at normal temperature, and makes the device have the characteristics of improved integrity, improved long-term stability, simple structure, small size and low cost.

Description

technical field [0001] The invention relates to the field of laser frequency stabilization, in particular to a method for realizing saturated absorption spectrum based on multiple reflections. Background technique [0002] In recent years, with the rapid development of semiconductor laser frequency stabilization technology, frequency-stabilized lasers have gained important applications in atomic clocks, atomic magnetometers, cold atom interference gyroscopes, nuclear magnetic resonance gyroscopes, and quantum simulations. Among them, using the sub-Doppler saturation absorption spectrum of the atomic hyperfine energy level structure to stabilize the frequency of the laser at the resonance transition line of the atomic hyperfine energy level is one of the most commonly used methods to obtain a frequency-stabilized laser source. However, this frequency stabilization method requires operations such as splitting the laser pump light and probe light into optical paths, splitting l...

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Problems solved by technology

However, this frequency stabilization method requires operations such as splitting the laser pump light and probe light into optical paths, splitting light intensity, polarization conversion, and splitting optical path detection, which requires multiple optical components, some of which are relatively expensive.

This also brings many problems, such as the introduction of additional system noise by multi-element devices; the large size of the device, which is not easy to integrate; the disadvantages of high cost

In addition, the realization of saturated absorption spectroscopy in a miniaturized atomic gas chamber requires an additional heating circuit, which increases the power consumption of the system

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