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Related Experiment Videos

Interferometric characterization of phase masks.

Mikhail Sumetsky1, Yury Dulashko, Tom P White

  • 1OFS Laboratories, 600 Mountain Avenue, Murray Hill, New Jersey 07974, USA. sumetski@ofsoptics.com

Applied Optics
|May 10, 2003
PubMed
Summary

We developed a new interferometric method to precisely measure phase masks for optical fiber gratings. This technique accurately characterizes grating period variations with picometer-level precision.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Accurate characterization of phase masks is crucial for fabricating high-quality optical fiber gratings.
  • Existing methods may lack the required precision or spatial resolution for detailed analysis.

Purpose of the Study:

  • To introduce and validate a novel interferometric technique for precise phase mask characterization.
  • To enable high-accuracy measurement of local grating period variations.

Main Methods:

  • Utilizing an interferometric setup analyzing interference patterns between zero- and first-order diffracted beams.
  • Applying the technique to phase masks for optical fiber grating fabrication.

Main Results:

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  • Achieved picometer-level accuracy in determining local grating period variations.
  • Demonstrated spatial resolution of a few millimeters.
  • Validated the method's applicability to various diffractive grating structures.

    • Conclusions:

    • The novel interferometric technique offers unprecedented accuracy and resolution for phase mask characterization.
    • This method is a valuable tool for advancing optical fiber grating fabrication.
    • The technique's broad applicability supports diverse diffractive optical element development.