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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

Laser-linewidth measurement with a Fizeau wavemeter.

C Reiser, P Esherick, R B Lopert

|September 12, 2009

Summary

This summary is machine-generated.

A Fizeau wedge wavemeter can measure laser linewidth, not just wavelength. This method accurately determines linewidths down to a few hundred megahertz for pulsed and continuous wave lasers.

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

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Published on: December 18, 2015

Area of Science:

Optics and Photonics
Laser Physics

Background:

Fizeau wedge wavemeters are standard instruments for laser wavelength measurement.
Laser linewidth is a critical parameter for laser performance and applications.

Purpose of the Study:

To investigate the capability of a Fizeau wedge wavemeter for laser linewidth measurement.
To demonstrate theoretical and experimental validation of this novel application.

Main Methods:

Theoretical analysis of Fizeau wedge interferometry for linewidth determination.
Experimental setup utilizing a Fizeau wedge wavemeter to measure linewidths of pulsed and continuous wave (cw) lasers.

Main Results:

Successful theoretical and experimental demonstration of using a Fizeau wedge wavemeter for laser linewidth measurement.
Achieved measurement of linewidths as small as a few hundred megahertz.
Demonstrated that proper selection of wedge thickness is crucial for high-resolution linewidth measurement.

Conclusions:

Fizeau wedge wavemeters offer a versatile tool for both wavelength and linewidth characterization of lasers.
This technique provides a sensitive method for evaluating laser spectral purity.