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Updated: Jun 15, 2026

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

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Absolute distance measurements by CO(2) laser multiwavelength interferometry.

G L Bourdet, A G Orszag

|March 9, 2010

Summary

This study presents a carbon dioxide (CO(2)) laser interferometer for precise absolute distance measurements. The fractional fringe technique utilizes multiple CO(2) spectral lines for enhanced accuracy.

Area of Science:

Optics and Photonics
Spectroscopy
Metrology

Background:

Absolute distance measurement is crucial in various scientific and industrial applications.
Traditional interferometry methods often face limitations in range and precision.
Carbon dioxide (CO(2)) lasers offer specific spectral properties advantageous for interferometric techniques.

Purpose of the Study:

To develop and describe a novel CO(2) laser interferometer for absolute distance measurements.
To explore the application of CO(2) spectroscopy in conjunction with interferometry.
To introduce and detail the fractional fringe technique for enhanced measurement accuracy.

Main Methods:

Utilizing a set of discrete CO(2) spectral lines for interferometric measurements.

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Implementing the fractional fringe technique to resolve interferometric ambiguities.

Describing the design and components of the developed CO(2) laser interferometer.

Main Results:

Demonstrated the capability of the CO(2) laser interferometer for absolute distance determination.
Validated the effectiveness of the fractional fringe technique in this context.
Provided a comprehensive description of the instrument's architecture and operational principles.

Conclusions:

The developed CO(2) laser interferometer enables accurate absolute distance measurements.
The fractional fringe technique, combined with CO(2) spectroscopy, offers a robust solution for metrology.
The instrument provides a valuable tool for applications requiring high-precision distance determination.