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Multiple-wedge wavemeter for pulsed lasers.

L S Lee, A L Schawlow

|August 28, 2009

Summary

This summary is machine-generated.

A novel wavelength meter precisely measures pulsed laser absolute wavelength to 1 part in 10^6. This device utilizes five Fizeau interferometers and microcomputer analysis for accurate laser wavelength determination.

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Area of Science:

* Optics and Photonics
* Laser Metrology
* Interferometry

Background:

* Precise measurement of laser wavelength is critical for various scientific and industrial applications.
* Existing methods for absolute wavelength measurement of pulsed lasers can be complex and less accurate.
* The need for high-precision, reliable wavelength determination drives innovation in optical metrology.

Purpose of the Study:

* To describe a new wavelength meter for measuring the absolute wavelength of pulsed laser radiation.
* To achieve a measurement accuracy of 1 part in 10^6.
* To present a practical and robust system for laser wavelength characterization.

Main Methods:

* Construction of a wavelength meter comprising five Fizeau (optical-wedge) interferometers.

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* Simultaneous fringe capture from a standard Helium-Neon (He-Ne) laser and an unknown pulsed laser.

* Utilization of a television camera interfaced with a microcomputer for fringe analysis and wavelength calculation.

Main Results:

* Successful demonstration of a wavelength meter capable of measuring absolute wavelength with high precision.
* Achieved accuracy of 1 part in 10^6 for pulsed laser radiation measurement.
* The system effectively processes fringe data for accurate wavelength determination.

Conclusions:

* The developed Fizeau interferometer-based wavelength meter offers a significant advancement in pulsed laser metrology.
* The system provides a reliable and accurate method for absolute wavelength measurement.
* This technology has potential applications in fields requiring precise laser characterization.