Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Il Nuovo cimento della Società italiana di fisica. B/Il Nuovo cimento B

Magnetic rotatory power of optically pumped Na vapour and its application to the study of longitudinal relaxation time and of buffer-gas-pressure broadening of optical lines

F. Strumia

Published Aug 1, 1966• 16 citations
Publisher
DOI
10.1007/bf02710815

Related papers

Lineshape changes in an optically thick Na vapour with a buffer gas

F. De Tomasi, M. Allegrini, E. Arimondo +2 more

Optics Communications•Dec 1, 1994•4 citations

Amplified Spontaneous Emission on Sodium D-lines Using Nonresonant Optical Pumping

Timofey D. Petukhov, Gennadiy S. Evtushenko, Evgeny N. Telminov

We describe experiments on the excitation of amplified spontaneous emission on the D -lines of sodium ( D 2 = 588.9 nm; D 1 = 589.6 nm) with longitudinal optical pumping with a large detuning from the D 2 line toward shorter wavelengths. The radiation spectra are measured, showing gain on both lines, at a Na concentration of (1–5) × 10 14 cm –3 , buffer gas (helium) pressure of 600 Torr at the working temperature, and pumping power density of more than 1.5 MW/cm 2 . The time characteristics show that the output radiation varies versus the concentration of sodium atoms in the active medium. The dependences of radiation absorption at the D -lines of sodium on the concentration of Na atoms and buffer gas pressure are given.

Atmospheric and Oceanic Optics•Jan 1, 2018•3 citations

Optical relaxation effects on magnetic resonances in vapours oriented by broad-line laser excitation

Gaspar T. Orriols, G. Alzetta, L. Moi

Optics Communications•Aug 1, 1982•2 citations

Optimizing longitudinal spin relaxation in miniaturized optically pumped magnetometers

A. McWilliam, S. Dyer, Dominic Hunter +7 more

The microfabrication of cesium vapor cells for optically pumped magnetometry relies on optimization of buffer gas pressure in order to maximize atomic coherence time and sensitivity to external magnetic signals. We demonstrate post-bond nitrogen buffer gas pressure tuning through localized heating of an integrated micropill dispenser. We characterize the variation in the intrinsic longitudinal relaxation rate, γ 10 , and magnetic sensitivity, as a function of the resulting nitrogen buffer gas pressure. Measurements are conducted by employing an optically pumped magnetometer operating in a free-induction-decay configuration. γ 10 is extracted across a range of nitrogen pressures between 60 and 700 torr, measuring a minimum of 140 Hz at 115 torr. In addition, we achieve sensitivities as low as 130 fT / Hz at a bias field amplitude of about 50 μ T . With the optimal nitrogen buffer gas pressure now quantified and achievable post-fabrication, these mass-producible cells can be tailored to suit a variety of sensing applications, ensuring peak magnetometer performance. Published by the American Physical Society 2024

arXiv:2406.19178•Physical Review Applied•Dec 5, 2024•9 citations

Transverse relaxation of sodium vapour pumped by laser light

Wojciech Skubiszak, Stanislaw Chudzynski, K. Ernst +1 more

Optics Communications•Feb 1, 1976•4 citations

Line-shape changes due to optical pumping of Na in buffer gas

Robert E. Walkup, Annie Spielfiedel, William D. Phillips +1 more

We have observed a collapse of the Na hyperfine doublet into a single peak due to laser-induced optical pumping when the product of laser power and buffer gas pressure exceeds \ensuremath{\sim}0.1 mW Torr. The complex line shapes observed under these conditions have been quantitatively explained by a model which describes the laser-induced change in the population of the ground-state hyperfine levels and also includes pressure broadening and diffusion of atoms out of the laser beam. The line-shape distortion can occur at laser intensities ${10}^{3}$ below that required for radiative saturation, and must be considered in experiments involving the line shape or the population of the hyperfine levels.

Physical Review A•Apr 1, 1981•38 citations
We describe experiments on the excitation of amplified spontaneous emission on the D -lines of sodium ( D 2 = 588.9 nm; D 1 = 589.6 nm) with longitudinal optical pumping with a large detuning from the D 2 line toward shorter wavelengths. The radiation spectra are measured, showing gain on both lines, at a Na concentration of (1–5) × 10 14 cm –3 , buffer gas (helium) pressure of 600 Torr at the working temperature, and pumping power density of more than 1.5 MW/cm 2 . The time characteristics show that the output radiation varies versus the concentration of sodium atoms in the active medium. The dependences of radiation absorption at the D -lines of sodium on the concentration of Na atoms and buffer gas pressure are given.
The microfabrication of cesium vapor cells for optically pumped magnetometry relies on optimization of buffer gas pressure in order to maximize atomic coherence time and sensitivity to external magnetic signals. We demonstrate post-bond nitrogen buffer gas pressure tuning through localized heating of an integrated micropill dispenser. We characterize the variation in the intrinsic longitudinal relaxation rate, γ 10 , and magnetic sensitivity, as a function of the resulting nitrogen buffer gas pressure. Measurements are conducted by employing an optically pumped magnetometer operating in a free-induction-decay configuration. γ 10 is extracted across a range of nitrogen pressures between 60 and 700 torr, measuring a minimum of 140 Hz at 115 torr. In addition, we achieve sensitivities as low as 130 fT / Hz at a bias field amplitude of about 50 μ T . With the optimal nitrogen buffer gas pressure now quantified and achievable post-fabrication, these mass-producible cells can be tailored to suit a variety of sensing applications, ensuring peak magnetometer performance. Published by the American Physical Society 2024
We have observed a collapse of the Na hyperfine doublet into a single peak due to laser-induced optical pumping when the product of laser power and buffer gas pressure exceeds \ensuremath{\sim}0.1 mW Torr. The complex line shapes observed under these conditions have been quantitatively explained by a model which describes the laser-induced change in the population of the ground-state hyperfine levels and also includes pressure broadening and diffusion of atoms out of the laser beam. The line-shape distortion can occur at laser intensities 103{10}^{3}103 below that required for radiative saturation, and must be considered in experiments involving the line shape or the population of the hyperfine levels.