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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 18 — Sep. 4, 2006
  • pp: 8127–8137

Harmonically-related diffraction gratings-based interferometer for quadrature phase measurements

Zahid Yaqoob, Jigang Wu, Xiquan Cui, Xin Heng, and Changhuei Yang  »View Author Affiliations

Optics Express, Vol. 14, Issue 18, pp. 8127-8137 (2006)

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We demonstrate the use of shallow diffraction gratings for quadrature phase interferometry. A single shallow diffraction grating-based Michelson interferometer yields only trivial (0° or 180°) phase shift between different output ports. In comparison, a combination of two parallel shallow diffraction gratings can be useful to achieve desired phase shifts (e.g., 90° for quadrature phase interferometry). We show that the phase at different output ports of a grating-pair based interferometer can be adjusted by shearing the two gratings with respect to each other. Two harmonically-related diffraction gratings are used to demonstrate phase shift control at the output ports of a modified Michelson interferometer. Our experimental data is in good agreement with theory.

© 2006 Optical Society of America

OCIS Codes
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(180.3170) Microscopy : Interference microscopy

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: June 28, 2006
Revised Manuscript: August 15, 2006
Manuscript Accepted: August 17, 2006
Published: September 1, 2006

Virtual Issues
Vol. 1, Iss. 10 Virtual Journal for Biomedical Optics

Zahid Yaqoob, Jigang Wu, Xiquan Cui, Xin Heng, and Changhuei Yang, "Harmonically-related diffraction gratings-based interferometer for quadrature phase measurements," Opt. Express 14, 8127-8137 (2006)

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