Abstract

We report a novel type of polarization optical time-domain reflectometry (POTDR) for fully distributed fiber-optic sensing, in which the reflected optical signal is from a series of fiber Bragg gratings that are uniformly distributed along the fiber. Compared with a conventional POTDR that uses the Rayleigh backscattering, this grating-assisted POTDR can have a much better signal-to-noise ratio and consequently a better measurement resolution and a larger measurement range of the fiber birefringence. Experimental results have shown that the measurement resolution of the grating-assisted POTDR is almost an order of magnitude better than that of a conventional POTDR.

© 2007 Optical Society of America

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References

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2006

2002

D. J. Webb, MRS Bull. 27, 365 (2002).
[CrossRef]

1999

A. Rogers, Meas. Sci. Technol. 10, R75 (1999).
[CrossRef]

1992

1987

J. P. Dakin, J. Phys. E 20, 954 (1987).
[CrossRef]

1986

1984

P. Healey, Electron. Lett. 20, 30 (1984).
[CrossRef]

1981

1980

Askins, C. G.

Bashkansky, M.

Dabkiewicz, P.

Dakin, J. P.

J. P. Dakin, J. Phys. E 20, 954 (1987).
[CrossRef]

Eickhoff, W.

Friebele, E. J.

Healey, P.

P. Healey, Electron. Lett. 20, 30 (1984).
[CrossRef]

Putnam, M. A.

Rashleigh, S. C.

Rogers, A.

A. Rogers, Meas. Sci. Technol. 10, R75 (1999).
[CrossRef]

Rogers, A. J.

Shatalin, S. V.

Tsai, T. E.

Ulrich, R.

Webb, D. J.

D. J. Webb, MRS Bull. 27, 365 (2002).
[CrossRef]

Williams, G. M.

Xie, H. M.

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Figures (6)

Fig. 1
Fig. 1

Schematic of a conventional POTDR.

Fig. 2
Fig. 2

Operation principle of a GA-POTDR: (a) sensing fiber, (b) OTDR trace.

Fig. 3
Fig. 3

Experimental setup: PC, polarization controller.

Fig. 4
Fig. 4

Traces from (a) the conventional POTDR: and from (b) the GA-POTDR.

Fig. 5
Fig. 5

Fiber beat-length measurement results from the GA-POTDR and from a conventional POTDR.

Fig. 6
Fig. 6

Experimental and theoretical results of fiber birefringence versus fiber bending radius.

Equations (1)

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β b = 0.27 π ( r R ) 2 λ ,

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