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Related Experiment Video

Updated: Jun 20, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Spectroscopic decay-rate measurements below the laser linewidth.

W E Cooke, S A Bhatti, C L Cromer

|August 28, 2009

Summary

This study introduces a laser-based method to measure atomic decay rates, even when they are very small. The technique uses depletion broadening to accurately determine autoionizing rates of specific atomic states.

Area of Science:

Atomic Physics
Quantum Optics
Laser Spectroscopy

Background:

Measuring decay rates of excited atomic states is crucial for understanding atomic structure and dynamics.
Traditional methods can be limited by factors like inhomogeneous broadening and laser linewidths, especially for small decay rates.

Purpose of the Study:

To develop and apply a novel laser-based technique for measuring atomic decay rates.
To accurately determine autoionizing rates for specific 6P((1/2))ns states.

Main Methods:

Utilizing strong coupling between two atomic levels with a pulsed laser.
Employing depletion broadening, where transition broadening is proportional to the square root of decay rate and laser pulse energy density.
Applying high laser power to overcome limitations of inhomogeneous broadening and laser linewidth.

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Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C₂, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

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Last Updated: Jun 20, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

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Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C₂, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

Main Results:

Demonstrated a method to measure decay rates significantly smaller than other broadening factors.
Successfully measured autoionizing rates of selected 6P((1/2))ns states using the depletion broadening technique.

Conclusions:

The depletion broadening technique provides a powerful tool for measuring atomic decay rates, particularly for weak transitions.
This method offers enhanced sensitivity and accuracy in atomic spectroscopy, enabling the study of previously challenging states.