Temperature compensation type polymer optical fiber SPR sensor

Abstract

The invention discloses a temperature compensation type plastic optical fiber SPR sensor, and belongs to the technical field of optical fiber sensors. The sensor is composed of a light source, a plastic optical fiber SPR sensing probe with a double-side-throwing double-coating structure, a spectrograph and a computer. According to the plastic optical fiber with the double-side-throwing structure,the plastic optical fiber is clamped on the optical fiber clamp, side-throwing machining is conducted through a side-throwing machine, after one side is machined, the optical fiber is detached, a symmetrical face is machined at the same position, the side-throwing depths of the two sides are the same, and therefore the double-side-throwing structure is obtained. Then the polishing surface is polished, finally, gold nanoparticles are respectively plated on the two polishing surfaces in an ion sputtering manner, and finally, a PDMS film is attached to one of the coated polishing surfaces, thereby forming the temperature compensation unit. The sensor has the advantages of simple structure and preparation process, low cost, high mechanical strength and good integration.

Description

Technical field[0001]The invention belongs to the technical field of optical fiber sensors, and specifically relates to a polymer optical fiber SPR sensor with a temperature compensation function and a preparation method thereof.Background technique[0002]The phenomenon of surface plasmon resonance (SPR) was discovered in the last century, but it was not taken seriously at the time. This phenomenon was later widely used in the surface plasmon resonance sensor proposed by Kretschmann. At present, surface plasmon resonance sensors are widely used in environmental detection, food safety, drug monitoring, chemical analysis, biological detection and many other aspects. As we all know, if the light at the interface of different media satisfies the condition of total reflection, total reflection will occur, but the light is not completely reflected back to the original medium. Instead, an evanescent wave is generated at the reflection point. If the evanescent wave resonates with the plasma ...

AI Technical Summary

Problems solved by technology

The processing flow of this sensor is more complicated

Combining the above reasons, there is a lack of easy-to-fabricate and low-cost sensors for simultaneous measurement of temperature and refractive index

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