Fiber optic cable in essence, is a hair-like glass conduit that carries virtually any type of signal from one point to another at light speed (at the speed of light has in glass, around two thirds of the speed it has in free space). Today, practically every communication network contains fiber optics, because fiber’s extra distance capability and seemingly unlimited data rate makes it possible to do things not possible with copper wire. Working with fiber optics needs some special tools and work practices. Here are some videos that give tips on working with fiber optic systems.
Visual fault locator (also called laser fault locator or 650nm fault locator) is a handheld visible laser source that emits a bright beam of laser light into a fiber, allowing the user to visually detect a fiber fault.
What you can do if you don’t have visual fault locator?Did you know that it is possible to test Multimode Fiber Optic Cable with a simple flashlight? It is so easy to do according to this video:
Fiber optic networks and testers generally use infrared light in the 850-1600 nm range, invisible to the human eye and potentially harmful to human eye (at high power). A fiber optic power meter can be used to measure
How to use Fiber Optic Power check Meter?
If you don’t have optic power meter in hand, it is possible to use the camera in your cell phone that is sensitive to infrared light to see the signal in the fiber (some cell phone cameras are better than others in this). The following video shows how to do it.
What if you want to identify fiber and/or see if there is signal in it without cutting the connection. There is special instrument for that: Fiber identifier