Optical sensor and method of fabricating the optical sensor
AssigneeKing Fahd University of Petroleum and Minerals
InventorsKhurram Karim Qureshi, Md. Ahasan Habib
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Abstract
An optical sensor that includes a photonic crystal fiber (PCF) and an optical coupler. The PCF includes a hollow core with a first diameter (Dc), an inner cladding section, and an outer layer surrounding the inner cladding section. The inner cladding section includes a cladding material and a plurality of spaced apart circular-shaped channels disposed in the cladding material surrounding the hollow core. The cladding material includes at least one of glass, ceramic, and glass-ceramic. Each spaced apart circular-shaped channel has substantially the same size and an average diameter (d). A first end of the PCF is in optical communication with a light source and a second end of the PCF is in optical communication with the optical coupler.
Claims8
A method of determining a concentration of an analyte in a composition, the method comprising:
- passing a composition through an optical sensor, wherein the optical sensor comprises:
- a photonic crystal fiber (PCF), having:
- a hollow core;
- an inner cladding section comprising a cladding material and a plurality of spaced apart circular-shaped channels disposed in the cladding material surrounding the core;
- and
- an outer layer surrounding the inner cladding section;
- wherein the hollow core has a first diameter (Dc);
- wherein the cladding material comprises at least one of glass, ceramic, and glass-ceramic:
- wherein each spaced apart circular-shaped channel has substantially the same size and an average diameter (d);
- and
- an optical coupler;
- wherein a first end of the photonic crystal fiber is in optical communication with a light source;
- and
- wherein a second end of the photonic crystal fiber is in optical communication with the optical coupler
- wherein the composition is passed through the optical sensor via the hollow core;
- exposing the composition in the hollow core to laser light such that a portion of the laser light is propagated through the hollow core of the optical sensor and the composition to form propagated light;
- and
- detecting the propagated light via the optical coupler;
- wherein the analyte comprises a molecule having a formula (I)
- wherein R is selected from the group consisting of a hydroxy group, an aryl group, a trifluoromethyl group, a C1 to C6 alkyl group, and a C1 to C6 alkoxy group.
Dependencies are inferred from the claim text.