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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 22 — Oct. 31, 2005
  • pp: 8913–8920

Measurement of the spectrally-resolved absolute phase difference between orthogonal optical modes using a nonlinear beat signal

Anastassia Gosteva, Markus Haiml, and Ursula Keller  »View Author Affiliations


Optics Express, Vol. 13, Issue 22, pp. 8913-8920 (2005)
http://dx.doi.org/10.1364/OPEX.13.008913


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Abstract

On the basis of white-light interferometry with spectrally integrated detection and Fourier transform (FT) analysis, we demonstrate a novel technique for measuring the spectrally-resolved absolute phase difference between orthogonal optical modes with milliradian precision. The phase difference is evaluated from a nonlinear beat signal, occurring in the phase spectrum when independent interferograms, formed by individual modes, are recorded simultaneously. Although scanning white-light FT interferometry is a linear technique in general, the nonlinear beat signal is due to spectral amplitude variations in each mode. These proof-of-principle absolute phase difference measurements were carried out with polarization and spatial fiber modes.

© 2005 Optical Society of America

OCIS Codes
(070.2590) Fourier optics and signal processing : ABCD transforms
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Research Papers

History
Original Manuscript: August 10, 2005
Revised Manuscript: October 18, 2005
Published: October 31, 2005

Citation
Anastassia Gosteva, Markus Haiml, and Ursula Keller, "Measurement of the spectrally-resolved absolute phase difference between orthogonal optical modes using a nonlinear beat signal," Opt. Express 13, 8913-8920 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-22-8913


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