A transverse loading technique to enhance the pressure measurement capability of fibre Bragg gratings

R. Correia; E. Chehura; S. W. James; R. P. Tatam

doi:10.1117/12.786559

16 May 2008 A transverse loading technique to enhance the pressure measurement capability of fibre Bragg gratings

R. Correia, E. Chehura, S. W. James, R. P. Tatam

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70045Q (2008) https://doi.org/10.1117/12.786559
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

A fibre optic pressure sensor based on the application of a transverse load onto an epoxy-resin material embedded over a sub-section of a fibre Bragg grating (FBG) is presented. When a transverse load is applied to the epoxy material it deforms and transfers the load onto the optical fibre in the form of an axial strain that changes the period of the FBG over the embedded region. This introduces a phase shift between the two resulting identical gratings that lie either side of the loaded section, creating a spectral drop-out within the bandwidth of the FBG. A 2 mm section at the centre of FBGs of length 6 mm, recorded in both single mode and highly linearly birefringent optical fibres, was embedded in resin, and were subsequently subjected to a transverse load. The loading technique, while offering protection to the optical fibre from mechanical damage, enhances transverse load sensitivity, without introducing birefringence.

Citation Download Citation

R. Correia, E. Chehura, S. W. James, and R. P. Tatam "A transverse loading technique to enhance the pressure measurement capability of fibre Bragg gratings", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70045Q (16 May 2008); https://doi.org/10.1117/12.786559

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available