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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 3 — Jan. 20, 2010
  • pp: 492–496

Simultaneous force and temperature measurement using long-period grating written on the joint of a microstructured optical fiber and a single mode fiber

Jianbo Xu, Yan-ge Liu, Zhi Wang, and Boyin Tai  »View Author Affiliations

Applied Optics, Vol. 49, Issue 3, pp. 492-496 (2010)

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A novel approach to simultaneous force and temperature measurement is proposed and demonstrated in this paper. The sensing element is based on a single long-period grating (LPG) formed by irradiating the joint of a microstructured optical fiber (MOF) and standard single mode fiber (SMF) with CO 2 laser pulses. The grating exhibits two groups of attenuation bands with distinctly different responses to temperature and force: the resonant notches in the MOF involving couplings between fundamental mode and core LP 11 modes are almost temperature insensitive but highly sensitive to force, while resonant notches in the SMF coming out of couplings between fundamental mode and cladding modes show high sensitivity to temperature but marginal sensitivity to force. Based on the LPG, a simple and efficient dual-parameter sensor simultaneously measuring temperature and force with a sensitivity of 0.086 nm / ° C and 2.18 nm / N , respectively, is achieved. Furthermore, we propose a simple sensing configuration for simultaneous strain and temperature measurement.

© 2010 Optical Society of America

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

ToC Category:
Diffraction and Gratings

Original Manuscript: September 25, 2009
Manuscript Accepted: December 7, 2009
Published: January 19, 2010

Jianbo Xu, Yan-ge Liu, Zhi Wang, and Boyin Tai, "Simultaneous force and temperature measurement using long-period grating written on the joint of a microstructured optical fiber and a single mode fiber," Appl. Opt. 49, 492-496 (2010)

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