DocumentCode :
1563068
Title :
High pressure sensing using fiber Bragg gratings written in birefringent side hole fiber
Author :
Kreger, S. ; Calvert, S. ; Udd, E.
Author_Institution :
Blue Road Res., Gresham, OR, USA
fYear :
2002
Firstpage :
355
Abstract :
Pressure measurements are made by measuring Bragg grating peak splitting caused by transverse strain differences in the core of a single mode side hole fiber. The side holes and not the fiber exterior are pressurized, demonstrating the ability to use the side holes as a pressure conduit so that pressure measurements can be made in a thermally and mechanically stable environment. Geometrical and residual stress-based birefringence stemming from partial side hole collapse during the drawing process allows measurements to be made near atmospheric pressures. Peak fitting techniques are used to determine peak separation to sub-pm levels despite substantial peak overlap.
Keywords :
Bragg gratings; birefringence; curve fitting; fibre optic sensors; internal stresses; mechanical stability; optical fibre polarisation; pressure sensors; thermal stability; Bragg grating peak splitting; birefringent side hole fiber; drawing process; fiber Bragg gratings; geometrically-based birefringence; high pressure sensing; mechanically stable environment; partial side hole collapse; peak fitting techniques; peak overlap; peak separation; pressure conduit; pressure measurements; pressurized side holes; residual stress-based birefringence; single mode side hole fiber core; thermally stable environment; transverse strain differences; Birefringence; Bragg gratings; Capacitive sensors; Electromagnetic measurements; Fiber gratings; Optical fibers; Pressure measurement; Strain measurement; Stress; Temperature sensors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Optical Fiber Sensors Conference Technical Digest, 2002. Ofs 2002, 15th
Conference_Location :
Portland, OR, USA
Print_ISBN :
0-7803-7289-1
Type :
conf
DOI :
10.1109/OFS.2002.1000576
Filename :
1000576
Link To Document :
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