Work

Absolute frequency measurement of the 6s 2 1 S 0 → 6s6p 3 P 1 F = 3/2 → F′ = 5/2 201 Hg transition with background-free saturation spectroscopy

Year: 2022

Type: article

Abstract: We report the development of a method for eliminating background-induced systematic shifts affecting precise measurements of saturation absorption signals. With this technique, we measured the absolute frequency of the 6 s 2 1 S 0 → 6 s 6 p 3 P 1 transition in 201 a Hg ( F = 3/2 → F ′ = 5/2) to be 1181541111051(83) kHz. The measurement was referenced with an optical frequency comb synchronized to the frequency of the local representation of the UTC. This specific atomic line is situated on the steep slope of the Doppler background at room temperature, which results in a frequency systematic shift. We determined the dependence of this shift on the properties of both the spectral line and the background of the measured signal.

Source: Optics Express

DOI: 10.1364/oe.475986

Authors: Adam Linek, Piotr Morzyński, Marcin Witkowski

Institution: Nicolaus Copernicus University

Language: English

Topic: Advanced Frequency and Time Standards

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Narodowe Centrum Nauki, European Metrology Programme for Innovation and Research