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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 22 — Oct. 30, 2006
  • pp: 10351–10358

Theoretical study of the effect of slow light on BOTDA spatial resolution

Fabien Ravet, Liang Chen, Xiaoyi Bao, Lufan Zou, and V.P. Kalosha  »View Author Affiliations

Optics Express, Vol. 14, Issue 22, pp. 10351-10358 (2006)

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Due to the resonant nature of Brillouin scattering, delay occurs while pulse is propagating in an optical fiber. This effect influences the location accuracy of distributed Brillouin sensors. The maximum delay in sensing fibers depends on length, position, pump and Stokes powers. Considering pump depletion, we have obtained integral solutions for the coupled amplitude equations under steady state conditions and then calculated the group delay. The results show that moderate pump depletion (which is the optimized sensor working range) mitigates significantly the delay, and the maximum delay induced at resonance is only a fraction of Brillouin Optical Time Domain (BOTDA) spatial resolution, which means that the use of pulse width to define the spatial resolution is valid when Brillouin slow light is considered. We have shown that uniform strain and temperature distribution in a fiber gives the maximum delay induced uncertainty.

© 2006 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 27, 2006
Revised Manuscript: September 19, 2006
Manuscript Accepted: September 20, 2006
Published: October 30, 2006

Fabien Ravet, Liang Chen, Xiaoyi Bao, Lufan Zou, and V. P. Kalosha, "Theoretical study of the effect of slow light on BOTDA spatial resolution," Opt. Express 14, 10351-10358 (2006)

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