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Related Experiment Video

Updated: Jun 16, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Iodine stabilized laser with three internal mirrors.

J B Cole, C F Bruce

|February 16, 2010

Summary

This summary is machine-generated.

This study details an improved Helium-Neon (He-Ne) laser stabilized using iodine vapor. The new design achieves high frequency stability and precise wavelength measurements, crucial for metrology.

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Area of Science:

Atomic, Molecular, and Optical Physics
Metrology and Measurement Science

Background:

Helium-Neon (He-Ne) lasers are fundamental tools in metrology.
Stabilization using saturated absorption enhances laser precision.
Iodine-129 ((129)I(2)) vapor provides a reliable reference for laser frequency stabilization.

Purpose of the Study:

To describe the construction and operation of a novel He-Ne laser.
To enhance laser frequency stability through advanced stabilization techniques.
To accurately measure the laser's wavelength against the Krypton-86 standard.

Main Methods:

Utilized a fused silica He-Ne laser with internal mirrors.
Implemented a three-mirror cavity design to optimize absorber interaction.
Employed a control system with simultaneous first- and third-harmonic error sensing for stabilization.
Measured laser frequency and wavelength against the Krypton-86 ((86)Kr) standard.

Main Results:

The constructed He-Ne laser demonstrated high frequency stability.
The measured wavelength of a specific hyperfine component was determined to be 632991 327 ± 0.7 fm.
Results are consistent with the Rowley-Hamon model of the krypton line profile.

Conclusions:

The developed He-Ne laser system offers superior performance for frequency stabilization.
The precise wavelength measurement contributes to the accuracy of length standards.
The advanced stabilization technique validates its effectiveness in metrological applications.