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Investigation Of Humidity And Temperature Response Of A Silica Gel Coated Microfiber Coupler, Yuliya Semenova, Gerald Farrell, Dejun Liu
Investigation Of Humidity And Temperature Response Of A Silica Gel Coated Microfiber Coupler, Yuliya Semenova, Gerald Farrell, Dejun Liu
Conference Papers
The humidity and temperature responses of a microfiber coupler (MFC) coated with silica gel are investigated. Two MFC structures with different waist diameters of 2.5 and 3.5 μm were fabricated by fusing and tapering two single-mode fibers using a microheater brushing technique. The influences of the coating thickness and tapered waist diameter on the sensing performance are analyzed. For the proposed sensor with a waist diameter of 2.5 μm and 8-layers thick coating, the change in the relative humidity (RH) results in an exponential blueshift with a maximum sensitivity of 1.6 nm/% RH in the range from 70 to 86% …