Phase-detection optical fiber SPR (Surface Plasmon Resonance) biochemical sensing system
A sensing system and phase detection technology, applied in the field of SPR principles, can solve problems such as low stability, limitations, and large volume, and achieve the effects of low cost, good stability, and high resolution
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[0013] 1. Preparation process
[0014] 1) The side of the multi-dual-core optical fiber is treated with microstructure by grinding technology, and the side of the bent optical fiber is ground into a plane, so that the core is exposed;
[0015] 2) Depositing a gold film with a thickness of 50nm on the surface of the exposed fiber core by magnetron sputtering technology;
[0016] 3) Connect the two points of the processed dual-core fiber to the single-mode fiber respectively, one end to the light source, and the other end to the collimator lens;
[0017] 4) Pass the light emitted by the collimating lens through the Wollaston prism, and receive it by the photodetector;
[0018] 5) Connect the photodetector to the computer with a USB data cable;
[0019] 2. Operation
[0020] 1) Encapsulate the sensing element in the flow cell, keep it sealed, and reduce the volatilization of experimental samples;
[0021] 2) The sensing element is connected with the light source and the colli...
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