FEASIBILITY STUDY OF A FIBER BRAGG GRATING BASED ACCELEROMETER

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Authors
  1. Hill, K.O.
  2. Bilodeau, F.
  3. Theriault, S.
  4. Albert, J.
  5. Malo, B.
  6. Johnson, D.C.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN);Communications Research Centre, Ottawa ONT (CAN)
Abstract
This report describes the feasibility study of a Fiber Bragg Grating (FBG) based accelerometer. FBGs are periodic modulation of the refractive index of the core in an optical fiber. This periodic modulation creates an optical narrowband reflection filter which can be used in a variety of applications in telecommunications and in sensing. The first FBG was observed at the Communications Research Centre (CRC) by K.O. Hill in 1978. FBGs became a hot research topic in 1989 when side writing through the cladding was first demonstrated at United Technologies Corporation. What mae FBGs practical devices was the phase mask writing technique developed at CRC in 1992. Now FBGs are manufactured in large quantities throughout the world. This project is the first study of FBGs as accelerometers. FBGs have been studied for strain, temperature and hydrostatic pressure sensing because they have unique advantages over classical electrical systems. These advantages are electromagnetic interference immunity, light weight and small size, high temperature and radiation tolerance, flexibility, stability and durability against harsh environments. Also they have the advantage of being absolute, linear in response and of very low insertion loss so that they can be multiplexes in series for distributed sensing along a single monomode fiber. TRUNCATED
Report Number
DREV-CR-1999-047 — Contract Report
Date of publication
28 Feb 1999
Number of Pages
148
DSTKIM No
99-00862
CANDIS No
510731
Format(s):
Hardcopy;Document Image stored on Optical Disk

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