Cesium atomic Doppler broadening thermometry for room temperature measurement

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2019,（6）
• 页码范围: 1-4
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201917.060201

摘要

Atomic Doppler broadening thermometry (DBT) is potentially an accurate and practical approach for thermodynamic temperature measurement.However,previous reported atomic DBT had a long acquisition time and had only been proved at the triple point of water,0℃,for the purpose of determination of the Boltzmann constant.This research implemented the cesium atomic DBT for fast room temperature measurement.The Cs133 D1 (6S1/2→ 6p1/2 transition) line was measured by direct laser absorption spectroscopy,and the quantity of thermal-induced linewidth broadening was precisely retrieved by the Voigt profile fitting algorithm.The preliminary results showed the proposed approach had a 4 min single-scan acquisition time and 0.2％ reproducibility.It is expected that the atomic DBT could be used as an accurate,chip-scale,and calibration-free temperature sensor and standard.