High-sensitivity fiber-tip pressure sensor with graphene diaphragm |
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| Authors: | Ma Jun Jin Wei Ho Hoi Lut Dai Ji Yan |
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| Institution: | Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, China. |
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| Abstract: | A miniature fiber-tip pressure sensor was built by using an extremely thin graphene film as the diaphragm. The graphene also acts as a light reflector, which, in conjunction with the reflection at the fiber end-air interface, forms a low finesse Fabry-Perot interferometer. The graphene based sensor demonstrated pressure sensitivity over 39.4 nm/kPa with a diaphragm diameter of 25 μm. The use of graphene as diaphragm material would allow highly sensitive and compact fiber-tip sensors. |
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