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Related Experiment Video

Updated: Jun 20, 2026

In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence

In Situ Measurement of Vacuum Window Birefringence using ²⁵Mg⁺ Fluorescence

Published on: June 13, 2020

Pair-absorption-pumped barium laser.

R W Falcone¹, G A Zdasiuk

¹Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.

|August 21, 2009

Summary

This summary is machine-generated.

This study demonstrates pair-absorption transitions for optically pumping lasers for the first time. Researchers achieved laser emission using simultaneous excitation of colliding barium and thallium atoms.

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Published on: June 13, 2020

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

Area of Science:

Atomic physics
Laser science

Background:

Optically pumping lasers typically involves single-atom transitions.
Pair-absorption transitions offer a novel excitation pathway.

Purpose of the Study:

To demonstrate the feasibility of using pair-absorption transitions for optical pumping of lasers.
To achieve laser emission via simultaneous excitation of colliding atoms.

Main Methods:

Utilized a mixture of barium and thallium metal vapors.
Employed single-photon absorption at 3867 Å to excite colliding ground-state atoms.
Observed laser emission on a specific barium atomic transition.

Main Results:

Achieved simultaneous excitation of barium and thallium atoms to specific excited states.
Created high excited-state densities (approximately 10^14 cm^-3).
Observed laser emission at 1.5 micrometers on the Ba(6s6p 1PI(o)) - Ba(6s5d 1D2) transition.

Conclusions:

Pair-absorption transitions are a viable method for optically pumping lasers.
This technique enables efficient creation of excited-state populations for laser operation.