Recent developments in optical fiber sensing using fiber Bragg gratings

G. P. Brady; Kyriacos Kalli; David J. Webb; David A. Jackson; Lin Zhang; Ian Bennion

doi:10.1117/12.255350

25 October 1996 Recent developments in optical fiber sensing using fiber Bragg gratings

G. P. Brady, Kyriacos Kalli, David J. Webb, David A. Jackson, Lin Zhang, Ian Bennion

Proceedings Volume 2839, Fiber Optic and Laser Sensors XIV; (1996) https://doi.org/10.1117/12.255350
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

We report on recent work on sensing using in-fiber Bragg gratings carried out in our laboratory. First, an alternative method of discriminating between temperature and strain effects using a conventionally written, in-fiber Bragg grating is presented. The technique uses wavelength information from the first and second diffraction orders of the grating element to determine the wavelength dependent strain and temperature coefficients, from which independent temperature and strain measurements can be made. Secondly, we describe an all-fiber, passive scheme for making extended range interferometric measurements based on the dual wavelength technique. A coherence turned interferometer network is illuminated with a single superfluorescent fiber source at 1.55 mm and the two wavelengths are synthesized at the output by means of chirped fiber Bragg gratings.

Citation Download Citation

G. P. Brady, Kyriacos Kalli, David J. Webb, David A. Jackson, Lin Zhang, and Ian Bennion "Recent developments in optical fiber sensing using fiber Bragg gratings", Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996); https://doi.org/10.1117/12.255350

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