Strain isolated optical fibre bragg grating sensor
First Claim
1. A strain isolated optical fibre Bragg grating sensor having an optical fibre provided at or adjacent one end thereof with a Bragg grating, and an open mouth cap surrounding the fibre end and region provided with the Bragg grating at a spacing from the fibre, fibre end and Bragg grating, which cap is sealed to the optical fibre at the open mouth at a side of the Bragg grating remote from the fibre end, is made from a low Young'"'"'s modulus material, and is operable to isolate the Bragg grating from strain.
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Accused Products
Abstract
A strain isolated optical fibre Bragg grating sensor (1) has an optical fibre (2) provided at or adjacent one end (2a) with the Bragg grating (3). An open mouth cap (4) surrounds the fibre end (2a) and region provided with the Bragg grating (3) at a spacing from the fibre, fibre end and Bragg grating. The cap (4) is sealed to the fibre (2) at the open mouth at a side of the grating (3) remote from the fibre end (2a). The cap (4) is made from a low Young'"'"'s modulus material and is operable to isolate the grating (3) from strain.
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Citations
7 Claims
- 1. A strain isolated optical fibre Bragg grating sensor having an optical fibre provided at or adjacent one end thereof with a Bragg grating, and an open mouth cap surrounding the fibre end and region provided with the Bragg grating at a spacing from the fibre, fibre end and Bragg grating, which cap is sealed to the optical fibre at the open mouth at a side of the Bragg grating remote from the fibre end, is made from a low Young'"'"'s modulus material, and is operable to isolate the Bragg grating from strain.
Specification