The invention belongs to the technical field of
optical fiber sensing, and mainly relates to an
optical fiber cladding SPR sensor, and a use method and a manufacture method thereof. The invention aimsat providing an
optical fiber cladding SPR sensor, and solves a problem that the conventional optical
fiber SPR sensor is difficult to process and manufacture, evanescent
waves are hard to obtain andcost is high. According to the invention, a normal optical
fiber is subjected to core shift
welding on an optical
fiber welding machine, light in a fiber core is leaked in the cladding, when the light arrives at an interface of the cladding and the air, the evanescent
waves can be leaked from the cladding, a nanoscale
gold film is formed at the interface of the cladding and the air through plating, thus, an SPR effect happens at the outside of the cladding, and complex
processing technologies are avoided; compared with the conventional optical fiber SPR sensor, the optical fiber cladding SPRsensor provided by the invention has the advantages of being small in volume, novel in structure and less difficult to manufacture, and so on, and is widely researched and applied in the fields of bio-pharmaceuticals,
food safety inspection and chemical detection.