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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 16 — Aug. 15, 2013
  • pp: 3169–3172

Birefringence dispersion compensation demodulation algorithm for polarized low-coherence interferometry

Shuang Wang, Tiegen Liu, Junfeng Jiang, Kun Liu, Jinde Yin, and Fan Wu  »View Author Affiliations

Optics Letters, Vol. 38, Issue 16, pp. 3169-3172 (2013)

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A demodulation algorithm based on the birefringence dispersion characteristics for a polarized low-coherence interferometer is proposed. With the birefringence dispersion parameter taken into account, the mathematical model of the polarized low-coherence interference fringes is established and used to extract phase shift information between the measured coherence envelope center and the zero-order fringe, which eliminates the interferometric 2π ambiguity of locating the zero-order fringe. A pressure measurement experiment using an optical fiber Fabry–Perot pressure sensor was carried out to verify the effectiveness of the proposed algorithm. The experiment result showed that the demodulation precision was 0.077 kPa in the range of 210 kPa, which was improved by 23 times compared to the traditional envelope detection method.

© 2013 Optical Society of America

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5475) Instrumentation, measurement, and metrology : Pressure measurement

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: May 29, 2013
Revised Manuscript: July 22, 2013
Manuscript Accepted: July 22, 2013
Published: August 15, 2013

Shuang Wang, Tiegen Liu, Junfeng Jiang, Kun Liu, Jinde Yin, and Fan Wu, "Birefringence dispersion compensation demodulation algorithm for polarized low-coherence interferometry," Opt. Lett. 38, 3169-3172 (2013)

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