How do I know if the fiber is broken or not working?

ONE. How do I know if an optical fiber is broken or not working? Optical fiber is a shorthand for optical fiber, a fiber made of glass or plastic that serves as a light-conducting tool. The principle of transmission is ' total reflection of light '. In multimode fiber, the core diameter is 50μm and 62.5μm two kinds, roughly the thickness of human hair is equivalent. The diameter of the core of the single-mode fiber is 8μm ~ 10μm. outside the core is surrounded by a layer of refractive index lower than the core of the glass envelope to keep the light in the core. Outside the core is a thin plastic jacket to protect the jacket. Fiber optic failure or fiber optic breaks can be found using a red light pen or OTDR tester. 1, if it is a single indoor optical fiber, can be connected to the red light pen at one end of the optical fiber "light". Red light pen emits visible light, in the fiber breaks will have red light "leakage". This way can be directly found with the naked eye breakpoints. 2, with the OTDR tester test. One end of the fiber is connected to one end of the fiber to be tested, through the tester "light", the instrument screen can see the fiber break from the test point of the distance, as well as the fiber optic connectors and fusion splicing point attenuation.

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