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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 15 — May. 20, 2007
  • pp: 2831–2837

Influence of surrounding media refractive index on the thermal and strain sensitivities of long-period gratings

Ricardo Canute Kamikawachi, Gustavo Rafael Collere Possetti, Rosane Falate, Marcia Muller, and José Luís Fabris  »View Author Affiliations


Applied Optics, Vol. 46, Issue 15, pp. 2831-2837 (2007)
http://dx.doi.org/10.1364/AO.46.002831


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Abstract

A detailed study of the thermal and strain sensitivities of a long-period grating when the device is immersed in different external media is presented. The range of refractive indices analyzed are within 1.000 to 1.447, corresponding to samples of air, water, ethanol, naphtha, thinner, turpentine, and kerosene. Within the same range of refractive indices, the strain sensitivity is between ( 0.24 ± 0.03 ) and ( 0.94 ± 0.11 ) pm / με . For the grating immersed in these fluids, the refractive index sensitivity ranges from 3 to 1035.6 nm per refractive index units. The coupling thermo-optic coefficients and the strain-optic coefficients are also measured, resulting in the range from ( 2.45 ± 0.04 ) × 10 5 to ( 15.89 ± 0.82 ) × 10 5   deg   C 1 and ( 1.15 ± 0.04 ) to ( 1.61 ± 0.04 ) με 1 , respectively. A noticeable nonlinear behavior of the thermal sensitivity is found for external media with refractive indices higher than 1.430.

© 2007 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: September 25, 2006
Manuscript Accepted: January 11, 2007
Published: May 1, 2007

Citation
Ricardo Canute Kamikawachi, Gustavo Rafael Collere Possetti, Rosane Falate, Marcia Muller, and José Luís Fabris, "Influence of surrounding media refractive index on the thermal and strain sensitivities of long-period gratings," Appl. Opt. 46, 2831-2837 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-15-2831


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