Optical fiber light leakage detection device

Abstract

The present invention belongs to the laser application technological field and relates to an optical fiber light leakage detection device. The optical fiber light leakage detection device comprises abare optical fiber, a copper wire, a plastic bushing and an armoring bushing; at least one copper wire is provided; the bare optical fiber and the at least one copper wire are located in the plastic bushing; the at least one copper wire is located outside the bare optical fiber; the armoring bushing sleeves the outer side of the plastic bushing; two ends of the bare optical fiber are respectivelyprovided with a resistor assembly and a temperature switch assembly; two ends of each of the at least one copper wire are respectively connected with the resistor assembly and the temperature switch assembly; and a detection circuit is composed of the at least one copper wire, the resistor assembly and the temperature switch assembly. The optical fiber light leakage detection device of the invention has the advantages of simple structure and wide application range. With the optical fiber light leakage detection device adopted, the occurrence of major accidents such as fires due to the light leakage of optical fibers can be effectively avoided.

Description

technical field [0001] The present application relates to the technical field of laser application, in particular to an optical fiber light leakage detection device. Background technique [0002] In industrial laser applications, the bare fiber for high-power laser transmission is mainly multimode fiber. Existing bare fiber structures such as figure 1 As shown, it usually consists of a core 1, a cladding 2 and a coating 3. Wherein, the material of the core 1 and the cladding 2 is generally high-purity quartz glass, and the material of the coating layer 3 is generally plastic materials such as nylon and Teflon. The refractive index of the core 1 is n1, the refractive index of the cladding 2 is n2, and n1>n2. When the laser is transmitted in the fiber core, when the laser incident angle is within the numerical aperture of the fiber, the laser is totally reflected on the core-cladding interface, and the laser can be completely limited in the fiber core for transmission. [...

AI Technical Summary

Problems solved by technology

Where the bending radius becomes smaller, the condition of total reflection may not be satisfied, at this time, the transmitted laser light will leak into the coating layer 3 of the optical fiber

At the same time, the occurrence of stress on the bare fiber, damage to the cladding surface, and return light from the workpiece surface may cause laser leakage

And because the heat-resistant temperature of coating layer 3 itself is low, it is very easy to burn coating layer 3 when laser leaks

When the optical fiber has no optical fiber leakage detection, the entire optical fiber will be burned quickly, and in severe cases, it will cause fires in laser equipment and supporting equipment, causing major damage to life and property

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