Precision optical metrology with alkali-atom isoclinic points

8th Symposium on Frequency Standards and Metrology 2015

Wells, Nathan^1 ; Driskell, Travis^1 ; Camparo, James^1

Physical Sciences Laboratories, Aerospace Corporation, PO Box 92957, Los Angeles

CA

90009, United States^1

关键词: Absorption resonances;    Atomic resonances;    Atomic state;    Doppler techniques;    Optical Metrology;    Precision spectroscopy;    Spectral peak;    Temperature sensitivity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012033/pdf
DOI  :  10.1088/1742-6596/723/1/012033

来源: IOP

【 摘 要 】

Vapour-phase spectroscopy rarely involves transitions between well-isolated atomic states. Routinely, the spectra comprise overlapped Doppler/pressure-broadened resonances, which leads to a "pulling" of the spectral peaks from their true atomic resonance frequencies. This pulling gives the absorption resonances a temperature sensitivity, which limits their utility for precision spectroscopy when sub-Doppler techniques are not viable. Here, we discuss the use of alkali isoclinic points as a solution to this problem.