Non-contact type temperature measuring device and method for atomic gas chamber

Abstract

The invention provides a non-contact type temperature measuring device and method for an atomic gas chamber. The method comprises the following steps of: heating the atomic gas chamber by using a heating twisted pair; starting and adjusting a laser; constructing a saturated absorption spectrum device by using a small part of lights split from a first beam splitter; splitting laser lights into detecting lights and reference lights by using a second beam splitter; adjusting a first attenuator and a second attenuator so that light intensities of the two laser lights are equal to each other; changing the detecting lights into levogyration circularly polarized lights by using a gamma / 4 wave plate; enabling the detecting lights to pass through the atomic gas chamber; detecting light intensities of the detecting lights and the reference lights by using a first photoelectric detector and a second photoelectric detector; performing subtracting, dividing and adding operations on the light intensities of the detecting lights and the reference lights; and recording a finally processing result by using a digital multimeter. Through the adoption of the non-contact type temperature measuring method provided by the invention, a method for measuring temperature by using a thermistor, a copper wire and the like in the original magnetic sensor can be replaced and influences on magnetic properties of a temperature measuring probe are eliminated. Moreover, the making of an optical trap can be eliminated and the laser beam utilization rate is increased.

Description

technical field [0001] The invention relates to a temperature measuring device, and the invention also relates to a temperature measuring method. In particular, the invention relates to a temperature measuring device and method of an atomic gas chamber in a non-contact atomic magnetometer. Background technique [0002] As a physical quantity that characterizes the degree of coldness and heat of an object, temperature is one of the most basic physical quantities in science and technology and industrial production. Therefore, the accuracy of temperature measurement and monitoring is increasingly demanding. In the research of high-sensitivity atomic magnetometers, it is necessary to heat the atomic gas chamber to a certain temperature. Generally, high-precision thermistors are used for temperature sensing, but the use of thermistors will bring spatial stray magnetic fields, which limits the sensitivity of the instrument. ; In addition, it is necessary to prepare optical traps ...

AI Technical Summary

Problems solved by technology

In the research of high-sensitivity atomic magnetometers, the atomic gas chamber needs to be heated to a certain temperature. Generally, high-precision thermistors are used for temperature sensing, but the use of thermistors will bring spatial stray magnetic fields, which limits the sensitivity of the instrument. ; In addition, it is necessary to prepare optical traps to absorb all the pumping laser light passing through the atomic gas cell, so as to avoid atomic depolarization caused by light reflection

Images