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Implementation of a Reference Interferometer for Nanodetection
16:11

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Published on: April 26, 2014

Chromatic dispersion measurements using a virtually referenced interferometer.

Michael A Galle1, Simarjeet S Saini, Waleed S Mohammed

  • 1Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada. michael.galle@utoronto.ca

Optics Letters
|May 26, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces a new method for measuring chromatic dispersion in short optical devices. The technique offers high accuracy and precision, combining speed with reliability for optical device characterization.

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Area of Science:

  • Optical Engineering
  • Metrology
  • Materials Science

Background:

  • Accurate measurement of chromatic dispersion is crucial for optical device performance.
  • Existing methods for short optical devices often face limitations in speed, accuracy, or complexity.
  • Unbalanced spectral interferometry offers speed, while balanced spectral interferometry offers accuracy.

Purpose of the Study:

  • To develop a novel technique for measuring chromatic dispersion in short optical devices (<1 m).
  • To combine the advantages of unbalanced and balanced spectral interferometry.
  • To achieve high accuracy and precision in dispersion measurements.

Main Methods:

  • Implementation of unbalanced spectral interferometry.
  • Inclusion of a virtual reference path to enhance accuracy.
  • Validation using well-known dispersion standards.

Main Results:

  • Demonstrated measurement accuracy for group delay of ~10(-3) ps/m ( <0.0001% relative error).
  • Achieved accuracy for the dispersion-length product of ~10(-5) ps/m (<0.5% relative error).
  • Exhibited measurement precision of ~10(-5) ps/m (<0.15% relative deviation).

Conclusions:

  • The presented technique effectively measures chromatic dispersion in short optical devices.
  • The method successfully merges the speed of unbalanced interferometry with the accuracy of balanced interferometry.
  • The validated technique provides a reliable tool for optical device characterization.