Chinese Optics Letters, 2019, 17 (6): 060201, Published Online: Jun. 12, 2019
Cesium atomic Doppler broadening thermometry for room temperature measurement Download: 859次
Abstract
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°C, 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.
Yijie Pan, Wenhan Liao, He Wang, Yan Yao, Jinhui Cai, Jifeng Qu. Cesium atomic Doppler broadening thermometry for room temperature measurement[J]. Chinese Optics Letters, 2019, 17(6): 060201.