Patent ID: 11965732
Assignee: TOUCHNETIX LIMITED
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. A strain sensor for embedding within a laminated material, comprising:
a first planar optical waveguide having a first waveguiding core defining a first optical propagation direction, a first Bragg grating in the first waveguiding core, a first thickness orthogonal to the first optical propagation direction, and a first width orthogonal to the first thickness and to the first optical propagation direction, the first width being at least an order of magnitude larger than the first thickness;
a second planar optical waveguide having a second waveguiding core defining a second optical propagation direction, a second Bragg grating in the second waveguiding core, a second thickness orthogonal to the second optical propagation direction, and a second width orthogonal to the second thickness and to the second optical propagation direction, the second width being at least an order of magnitude larger than the second thickness;
the first optical propagation direction being non-parallel to the second optical propagation direction;
cladding around the first waveguiding core and the second waveguiding core; and
optical fibers coupled to the first waveguiding core and the second waveguiding core for optical interrogation of the first Bragg grating and the second Bragg grating.