Optical sensor arrangement
First Claim
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1. An optical sensor arrangement comprising:
- a light source;
an optical waveguide coupled to the light source;
at least one long period grating disposed within the optical waveguide, wherein the long period grating has a plurality of index perturbations spaced apart by a periodic distance Λ
, wherein the long period grating promotes an excitation of confined propagating light into higher order modes causing an excitation of a sensing mechanism;
wherein the sensing mechanism receives light coupled from the long period grating; and
a detector coupled to the optical waveguide wherein the detector detects a resulting optical signal.
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Abstract
An optical sensor arrangement is provided. The arrangement comprises a light source coupled to an optical waveguide. The optical waveguide has at least one long period grating that promotes an excitation of confined propagating light into higher order modes causing an excitation of a sensing mechanism. A detector is coupled to the optical waveguide to detect a resulting optical signal.
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Citations
7 Claims
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1. An optical sensor arrangement comprising:
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a light source;
an optical waveguide coupled to the light source;
at least one long period grating disposed within the optical waveguide, wherein the long period grating has a plurality of index perturbations spaced apart by a periodic distance Λ
, wherein the long period grating promotes an excitation of confined propagating light into higher order modes causing an excitation of a sensing mechanism;
wherein the sensing mechanism receives light coupled from the long period grating; and
a detector coupled to the optical waveguide wherein the detector detects a resulting optical signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification