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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 4 — Feb. 25, 2013
  • pp: 4280–4290

Adaptive Sagnac interferometer with dynamic population grating in saturable rare-earth-doped fiber

Jorge López Rivera, Marcos Plata Sánchez, Alexei Miridonov, and Serguei Stepanov  »View Author Affiliations

Optics Express, Vol. 21, Issue 4, pp. 4280-4290 (2013)

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Sagnac fiber interferometer with the dynamic population grating formed in the rare-earth doped fiber is proposed for homodyne adaptive detection of optical phase modulation. The configuration is shown to be a simple all-optical fiber sensor suitable for linear high sensitivity detection of mechanical vibrations, acoustic signals, thermo-optic effect etc. Theoretical consideration shows that the quadratic response of this interferometric configuration associated with the amplitude dynamic grating is observed in the reflected wave mainly, while the recorded phase grating results in the linear energy exchange between the transmitted and reflected from the Sagnac loop light waves. Experiments with the erbium- and ytterbium-doped fiber based adaptive Sagnac configurations (with the operation wavelengths 1485 and 1064nm respectively) of the fiber accelerometers confirmed these general conclusions and demonstrated sensitivity of the fiber based interferometric configurations (~3*10−5 rad/Hz1/2) governed basically by the noise of the utilized lasers.

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OCIS Codes
(060.2410) Fiber optics and optical communications : Fibers, erbium
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(190.7070) Nonlinear optics : Two-wave mixing

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: November 26, 2012
Revised Manuscript: January 25, 2013
Manuscript Accepted: January 28, 2013
Published: February 12, 2013

Jorge López Rivera, Marcos Plata Sánchez, Alexei Miridonov, and Serguei Stepanov, "Adaptive Sagnac interferometer with dynamic population grating in saturable rare-earth-doped fiber," Opt. Express 21, 4280-4290 (2013)

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