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.
|Title of host publication||Fiber Optic and Laser Sensors XIV|
|Editors||Ramon P. DePaula, John W. Berthold|
|Number of pages||12|
|Publication status||Published - 25 Oct 1996|
|Event||Fiber Optic and Laser Sensors XIV - Denver, United States|
Duration: 4 Aug 1996 → …
|Conference||Fiber Optic and Laser Sensors XIV|
|Period||4/08/96 → …|
Bibliographical noteG. 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, 8 (October 25, 1996);
Copyright 1996 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
- optical fibre sensing
- bragg grating
- low coherence
- dual wavelength