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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 31 — Nov. 1, 2003
  • pp: 6284–6291

Measurement of Pressure and Temperature Sensitivities of a Bragg Grating Imprinted in a Highly Birefringent Side-Hole Fiber

Ewa Chmielewska, Waclaw Urbańczyk, and Wojtek J. Bock  »View Author Affiliations


Applied Optics, Vol. 42, Issue 31, pp. 6284-6291 (2003)
http://dx.doi.org/10.1364/AO.42.006284


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Abstract

The sensing characteristics of a Bragg grating imprinted in a specially developed highly birefringent side-hole fiber were investigated in detail. We showed that such a grating has almost identical sensitivities to temperature for both linearly polarized modes LP<sub>01</sub><sup><i>x</i></sup> and LP<sub>01</sub><sup><i>y</i></sup> (approximately 5.9 pm/K) and significantly different sensitivities to hydrostatic pressure (−1.93 pm/MPa for LP<sub>01</sub><sup><i>x</i></sup> and +5.37 pm/MPa for LP<sub>01</sub><sup><i>y</i></sup> mode). The sensitivity differences versus mode polarization are so high that this effect can be employed for simultaneous sensing of temperature and pressure by interrogation of the wavelength shifts at LP<sub>01</sub><sup><i>x</i></sup> and LP<sub>01</sub><sup><i>y</i></sup> modes. Applying interferometric methods, we also measured the sensitivity of the host side-hole fiber to temperature and hydrostatic pressure for each polarization mode. Our results show that there is good agreement between the normalized sensitivities of the host side-hole fiber and those of the grating for the same polarization modes.

© 2003 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(350.2770) Other areas of optics : Gratings

Citation
Ewa Chmielewska, Waclaw Urbańczyk, and Wojtek J. Bock, "Measurement of Pressure and Temperature Sensitivities of a Bragg Grating Imprinted in a Highly Birefringent Side-Hole Fiber," Appl. Opt. 42, 6284-6291 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-31-6284


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