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Laser wavemeter with solid Fizeau wedge interferometer.

C Reiser, R B Lopert

    Applied Optics
    |June 12, 2010
    PubMed
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    A novel Fizeau wavemeter utilizing a solid Fizeau wedge interferometer accurately measures laser wavelengths. This instrument achieves high precision, demonstrating experimental accuracy of 2 parts in 10^6 for pulsed or continuous wave laser light.

    Area of Science:

    • Optics and Photonics
    • Laser Metrology

    Background:

    • Accurate wavelength determination is crucial for laser applications.
    • Traditional wavemeters face limitations with pulsed or continuous wave (cw) laser light.

    Purpose of the Study:

    • To model and experimentally investigate a Fizeau wavemeter based on a solid Fizeau wedge interferometer.
    • To assess its suitability for measuring the wavelength of pulsed and cw laser light.

    Main Methods:

    • Development of a theoretical model for the Fizeau wedge interferometer.
    • Experimental setup and testing of the wavemeter with laser sources.
    • Analysis of achieved accuracy and wavelength range.

    Main Results:

    • The Fizeau wavemeter was successfully modeled and experimentally validated.

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  • High accuracy, on the order of a few parts in 10^6, was achieved over a wide wavelength range.
  • Experimental demonstration of 2 parts in 10^6 accuracy over a 40 nm range.

    • Conclusions:

    • The solid Fizeau wedge interferometer offers a robust platform for precise laser wavelength measurement.
    • The developed wavemeter is suitable for both pulsed and cw laser light.
    • Careful design enables high accuracy critical for advanced optical applications.