Side-throwing optical fiber-microstructure optical fiber fluid sensing system based on photonic band gap

Abstract

The invention belongs to the field of optical fiber fluid control, and particularly relates to a side-polished optical fiber-microstructure optical fiber fluid sensing system based on a photonic bandgap, wherein the system comprises side-polished optical fibers, a microstructure optical fiber, an inflow three-way pipe, an outflow three-way pipe, a super-continuous light source and a spectrograph;polishing and grinding ports of two sections of side-polished optical fibers are respectively welded with two ends of the microstructure optical fiber to form a side-polished optical fiber-microstructure optical fiber-side-polished optical fiber bilateral polishing and grinding structure, the other ends of the two sections of side-polished optical fibers are respectively connected with the super-continuous light source and the spectrograph, and polishing and grinding areas of the two sections of side-polished optical fibers are respectively embedded into the inflow three-way pipe and the outflow three-way pipe. The other ends of the inflow three-way pipe and the outflow three-way pipe are respectively connected with two ends of the microstructure optical fiber. According to the optical fiber fluid sensing system, real-time detection of flowing liquid can be achieved, the depth of the optical fiber polishing and grinding areas is flexible and controllable, the number of layers of microstructure optical fiber fluid channels can be controlled by changing the polishing and grinding depth, the sensitivity characteristic of the system is affected, and the optical fiber fluid sensing system can be widely applied to the field of optical sensing.

Description

technical field [0001] The invention belongs to the field of optical fiber fluid control, and in particular relates to a photonic band gap-based side throwing optical fiber-microstructure optical fiber fluid sensing system. Background technique [0002] Optical fiber microfluidic control technology enables functional materials to flow inside the optical fiber system and fill the entire space in the channel through the construction of fluid circulation devices, and interact with the light field while flowing, which can be widely used in biochemical analysis, environmental monitoring, etc. Numerous areas. [0003] The existing optical fiber fluid sensing systems on the market mainly have the following structures: SMF-C-PCF-C-SMF structure has high sensitivity, but its small C-shaped optical fiber brings operational difficulties, serious light leakage and cannot Transmission in a liquid core; fluidic control of side-channel photonic crystal fibers using tilted fibers. However...

AI Technical Summary

Problems solved by technology

But because the channel is far away from the core, the detection sensitivity is not high

In summary, the current optical fiber fluid control technology has achieved certain research results, but the simple processing technology cannot meet the requirements of replaceable filling fluid, which limits the application range of this technology

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