All-optical fiber laser type selective hypersensitive biochemical sensor
A biochemical sensor and selective technology, applied in the fields of material science, biochemical sensing, and optical sensing, can solve the problems of high price of biochemical sensor fluorescent labeling, difficulty in selective realization, and low sensing accuracy, so as to improve the sensing accuracy. High sensitivity, high signal-to-noise ratio and high reliability
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[0028] The present invention will be further described below with reference to the drawings and embodiments.
[0029] This embodiment provides an all-fiber laser type selective hypersensitivity biochemical sensor based on functionalized graphene oxide, and its structure is as follows figure 1 As shown, the Fabry-Perot cavity structure includes quartz capillary tubes, functionalized graphene oxide films, gold-plated single-mode optical fibers and other structures; among them:
[0030] The inner diameter of the quartz capillary tube is 126 microns and the length is 1.5 cm. The partially reduced graphene oxide film is deposited on the inner wall of the uniformly distributed graphene oxide dispersion liquid in the cavity through drying-reduction-drying steps. The specific steps are for:
[0031] 1) Vertically immerse a clean quartz capillary into the 1g / L graphene oxide dispersion liquid, and absorb the graphene oxide dispersion liquid by capillary action;
[0032] 2) Place the quartz cap...
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