Double fiber core plastic optical fiber

Abstract

The invention discloses a double fiber core plastic optical fiber which comprises a first cladding and a second cladding which is positioned on the outer side of the first cladding. A first fiber core and a second fiber core are placed side by side inside the first cladding. The refractive index of the first fiber core and the second fiber core is larger than that of the first cladding, and the refractive index of the first cladding is larger than that of the second refractive index. A protection layer is arranged on the outer side of the second cladding, and at least one of the first cladding and the second cladding is made of high polymer materials. The double fiber core plastic optical fiber has the advantages of being convenient to use, low in cost and good in application prospect.

Description

technical field [0001] The invention relates to a plastic optical fiber, in particular to a double-core plastic optical fiber. Background technique [0002] The optical fiber perimeter sensing monitoring system is a new security system, which has many advantages such as anti-electromagnetic interference and long monitoring distance. In the current optical fiber perimeter sensing monitoring system, the proportion of optical fiber interference method is relatively large, which has the advantages of It has the characteristics of low false negative rate and high precision, but its poor positioning ability and high false positive rate seriously affect its popularization and application. Compared with optical fiber interference, the optical fiber microbend sensing device has the advantages of low cost, positionability, and low false alarm rate, but it is difficult to combine with the fence or railing in the perimeter, and its practical application is very limited. The main problem...

AI Technical Summary

Problems solved by technology

[0002] The optical fiber perimeter sensing monitoring system is a new security system, which has many advantages such as anti-electromagnetic interference and long monitoring distance. In the current optical fiber perimeter sensing monitoring system, the proportion of optical fiber interference method is relatively large, which has the advantages of It has the characteristics of low false negative rate and high precision, but its poor positioning ability and high false positive rate seriously affect its popularization and application

Compared with optical fiber interference, the optical fiber microbend sensing device has the advantages of low cost, positionability, and low false alarm rate, but it is difficult to combine with the fence or railing in the perimeter, and its practical application is very limited. The main problem is that the existing microbend sensing The device still mainly uses ordinary communication optical fiber. The structure design of ordinary communication optical fiber is to reduce the microbending loss as much as possible. contradictory

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