Bisymmetric PCF-SPR (Photonic Crystal Fiber based Surface Plasmon Resonance) probe capable of working under high-refractivity solution environment
A PCF-SPR, high refractive index technology, applied in the field of optical fiber probes, can solve the problems of inconvenience and fixed position, and achieve the effects of easy installation and use, improved absorption, and enhanced surface plasmon resonance effect.
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[0024] Referring to each figure, a double symmetrical PCF-SPR probe working in a high refractive index solution environment, the double symmetrical PCF-SPR probe includes two symmetrical photonic crystal optical fibers 1 and a coating layer 7, the photonic crystal fiber A central air hole 2 is provided in the cladding 5 of the crystal fiber 1, and eight small outer air holes 3 and large outer air holes 4 arranged in a regular octagonal cross arrangement are arranged around the central air hole 2. The cladding Silver-graphene composite film 6 is plated on the outer wall of 5. This double symmetrical PCF-SPR probe utilizes the silver-graphene composite film 6 as the sensing layer, and the silver-graphene composite film 6 is coated on the outer wall of the cladding 5 of two optical fibers, and the solution to be measured is located in the silver-graphene composite film 6. Graphene composite film 6 outside. When light is injected into the two photonic crystal fibers 1, the light ...
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