Patent ID: 11966076
Assignee: NATIONAL RESEARCH COUNCIL OF CANADA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical fiber transducer comprising:
a stationary support;
a movable body supported in a manner displaceable back and forth relative to the stationary support in a predetermined direction;
an optical fiber having a portion thereof operatively connected between the stationary support and the movable body in a position extending axially in said predetermined direction, said portion of the optical fiber having a first coupling region at which said portion is operably connected to the stationary support, a second coupling region at which said portion is operably connected to the movable body and an intermediate region disposed between said first and second coupling regions;
a Fiber Bragg Grating in the intermediate region of said portion of the optical fiber; and
one or more tubular members disposed externally around said portion of the optical fiber, at least at the first and second coupling regions thereof, said one or more tubular members each comprising a material having a thermal expansion coefficient that is lesser than that of said stationary support and said movable body, and greater than that of the optical fiber;
wherein:
at the first coupling region, said portion of the optical fiber is bonded, by an internal adhesive of distinct material composition from the one or more tubular members, to a first internal surface area of said one or more tubular members, and a first external surface area of said one or more tubular members is bonded, by an external adhesive of distinct material composition from the one or more tubular members, to the stationary support; and
at the second coupling region, said portion of the optical fiber is bonded, by more internal adhesive of distinct material composition from the one or more tubular members, to a second internal surface area of said one or more tubular members, and a second external surface area of said one or more tubular members is bonded, by more external adhesive of distinct material composition from the one or more tubular members, to the movable body.