LMR microstructure optical fiber

Abstract

The invention provides an LMR microstructure optical fiber. The LMR microstructure optical fiber comprises a fiber core,cladding and four air holes located in the cladding,and adopts a fiber core cladding structure,no air hole is formed in the center of the fiber core,six fan-shaped air holes are same in size and are arranged in the shape of a regular hexagon,the hole medium refractive index is 1,and each fan-shaped air hole comprises a first cambered surface and a second cambered surface,wherein the second cambered surface is longer than the first cambered surface,and the second cambered surface is arranged to be away from the fiber core,two air holes roughly symmetrical relative to the center of the fiber core in the fan-shaped air hole are split so as to be communicated with the outsideworld,and TiO2 thin films are plated on the surfaces of the two split air holes. By means of the LMR microstructure optical fiber,not only the thin film materials are cheap,but also the flexibility and precision are greatly improved compared with a traditional sensor,and meanwhile film plating and to-be-tested fluid filling are facilitated.

Description

technical field [0001] The present invention relates to the technical field of microstructured optical fiber, in particular to LMR microstructured optical fiber. Background technique [0002] In the 1980s, as an excellent low-loss transmission line, optical fiber began to enter people's sight, and sensors based on optical fiber as a waveguide also became in full swing. Optical fiber sensors have incomparable advantages compared to traditional sensors: anti-magnetic interference, electrical insulation, good explosion-proof performance, corrosion resistance, good light guide performance, multi-parameter measurement, small size, and embeddability, etc. It is easy to form a sensor network, and Access to the Internet and Wi-Fi. [0003] However, the optical fiber sensor using ordinary optical fiber as the sensitive element has several insurmountable shortcomings such as large coupling loss, poor polarization-maintaining characteristics, and cross-sensitivity problems, which limi...

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Problems solved by technology

[0005] However, the existing microstructure sensing structure is relatively difficult to coat or fill the analyte because the air holes are too small (generally a few microns).

Moreover, the current microstructure optical fiber sensing based on traditional principle detection is relatively mature, and it is difficult to make a breakthrough in measurement sensitivity and accuracy. very important

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