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Applied Optics

Applied Optics


  • Vol. 42, Iss. 19 — Jul. 1, 2003
  • pp: 3766–3771

Sensing characteristics of a novel two-section long-period grating

Thomas Allsop, Ron Neal, Domenico Giannone, David J. Webb, Des J. Mapps, and Ian Bennion  »View Author Affiliations

Applied Optics, Vol. 42, Issue 19, pp. 3766-3771 (2003)

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The behavior of a temperature self-compensating, fiber, long-period grating (LPG) device is studied. This device consists of a single 325-μm-period LPG recorded across two sections of a single-mode B-Ge-codoped fiber—one section bare and the other coated with a 1-μm thickness of Ag. This structure generates two attenuation bands associated with the eighth and ninth cladding modes, which are spectrally close together (∼60 nm). The attenuation band associated with the Ag-coated section is unaffected by changes in the refractive index of the surrounding medium and can be used to compensate for the temperature of the bare-fiber section. The sensor has a resolution of ±1.0 × 10-3 for the refractive index and ±0.3 °C for the temperature. The effect of bending on the spectral characteristics of the two attenuation bands was found to be nonlinear, with the Ag-coated LPG having the greater sensitivity.

© 2003 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors

Original Manuscript: July 26, 2002
Published: July 1, 2003

Thomas Allsop, Ron Neal, Domenico Giannone, David J. Webb, Des J. Mapps, and Ian Bennion, "Sensing characteristics of a novel two-section long-period grating," Appl. Opt. 42, 3766-3771 (2003)

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  1. Y. Ruan, X. Huang, Y. Jiang, J. Wang, “The design and simulation of cascade long-period fiber gratings for flattening EDFA’s gain,” in Photorefractive Fiber and Crystal Devices: Materials, Optical Properties and Applications V, F. T. Yu, S. Yin, eds., Proc. SPIE3801, 240–245 (1999). [CrossRef]
  2. C. D. Su, L. A. Wang, “Linewidth broadening of Er-doped superfluorescent fiber source using long-period grating,” Electron. Lett. 35, 331–332 (1999). [CrossRef]
  3. A. Vengsarkar, P. Lemaire, J. Judkins, V. Bhatia, T. Erdogan, J. Sipe, “Long-period gratings as band-rejection filters,” J. Lightwave Technol. 14, 58–64 (1996). [CrossRef]
  4. V. Bhatia, A. M. Vengsarkar, “Optical fiber long-period grating sensors,” Opt. Lett. 21, 692–694 (1996). [CrossRef] [PubMed]
  5. H. J. Patrick, A. D. Kersey, F. Bucholtz, “Analysis of the response of long period fiber gratings to external index of refraction,” J. Lightwave Technol. 16, 1606–1612 (1998). [CrossRef]
  6. V. Grubsky, J. Feinberg, “Long-period gratings with variable coupling for real-time sensing applications,” Opt. Lett. 25, 203–205 (2000). [CrossRef]
  7. V. Bhatia, T. D’Alberto, N. Zabaronick, R. Claus, “Temperature-insensitive and strain-insensitive long-period gratings sensor for smart structures,” Opt. Eng. 36, 1872–1875 (1997). [CrossRef]
  8. R. P. Espindola, R. Windeler, A. Abramov, B. Eggleton, T. Strasser, D. DiGiovanni, “External refractive index insensitive air-clad long period fibre grating,” Electron. Lett. 35, 327–328 (1999). [CrossRef]
  9. W. James, M. L. Dockney, R. P. Tatam, “Simultaneous independent temperature and strain measurement using in-fibre Bragg grating sensors,” Electron. Lett. 32, 1133–1134 (1996). [CrossRef]
  10. M. G. Xu, J.-L. Archambault, L. Reekie, J. P. Dakin, “Discrimination between strain and temperature effects using dual-wavelength fibre grating sensors,” Electron. Lett. 30, 1085–1087 (1994). [CrossRef]
  11. M. Song, S. Lee, S. Choi, B. Lee, “Simultaneous measurement temperature and strain using two fiber Bragg gratings embedded in a glass tube,” Opt. Fiber Technol. Mater. Devices Syst. 3, 194–196 (1997). [CrossRef]
  12. B. O. Guan, H. Y. Tam, S. L. Ho, W.-H. Chung, X. Y. Dong, “Simultaneous strain and temperature measurement using a single fibre Bragg grating,” Electron. Lett. 36, 1018–1019 (2000). [CrossRef]
  13. H. Patrick, G. Williams, A. Kersey, J. Pedrazzani, A. Vengsarkar, “Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination,” IEEE Photon. Technol. Lett. 8, 1223–1225 (1996). [CrossRef]
  14. Y. J. Rao, P. J. Henderson, D. A. Jackson, L. Zhang, I. Bennion, “Simultaneous strain, temperature and vibration measurement using a multiplexed in-fibre-Bragg-grating/fibre-Fabry-Perot sensor system,” Electron. Lett. 33, 385–387 (1997). [CrossRef]
  15. X. Shu, B. Gwandu, Y. Liu, L. Zhang, I. Bennion, “Sampled fiber Bragg grating for simultaneous refractive index and temperature measurement,” Opt. Lett. 26, 774–776 (2001). [CrossRef]
  16. T. Allsop, L. Zhang, I. Bennion, “Detection of organic aromatic compounds in paraffin by a long period fibre grating optical sensor with optimised sensitivity,” Opt. Commun. 191, 181–190 (2001). [CrossRef]
  17. X. Shu, T. Allsop, B. Gwandu, L. Zhang, I. Bennion, “High-temperature sensitivity of long period gratings in B-Ge codoped fiber,” IEEE Photon. Technol. Lett. 13, 818–820 (2001). [CrossRef]
  18. M. Born, E. Wolf, Principles of Optics, 6th ed. (Pergamon, Exeter, 1980).
  19. W. Du, H. Tam, M. Liu, X. Tao, “Long-period fiber grating bending sensors in laminated composite structures,” in Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, R. O. Claus, W. B. Spillman, eds., Proc. SPIE3330, 284–292 (1998).

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