The function of OTDR
An OTDR (Optical Time Domain Reflectometer) is used in fiber optics to measure the time and intensity of the light reflected on an optical fiber.
An OTDR can detect such light loss and pinpoint trouble areas, making repairs easy. The more quickly trouble areas are identified and addressed, the less your fiber optic network will suffer from data transfer problems. More to the point, it is used as a troubleshooting device to find faults, splices, and bends in fiber optic cables, with an eye toward identifying light loss. Light loss is especially important in fiber optic cables because it can interfere with the transmission of data.
The OTDR is not perfect, of course. Critics charge that it can produce inaccurate results if two trouble spots are very close together or if the pulse has a long travel length. Experts also urge training in order to interpret the data correctly. Another factor is the relatively high price for a device that might be used only sparingly.
Proponents, however, counter that being able to pinpoint and address light loss points is well worth the price, both for the OTDR device and for the training needed to operate and properly understand the data that that OTDR records.
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How to connect fiber optic cable ? There are three methods for connecting the fiber optic cable including the permanent connection, emergency connection and the active connection. The permanent connection (also called hot melt) refers to melt the connection point of the fibers and then connect the fibers by the discharge method. The permanent connection is usually used in the long-distance connection, permanent or semi-permanent fixed connection. The emergency connection is also called cold fusion. The emergency connection mainly fixes and stuck two fibers together by mechanical and chemical methods. The main characteristic of this method is quick and reliable.
The common fiber optic cable specification . The fiber optic cable is mainly composed of fibers and a plastic protective sleeve and plastic sheath. Without the gold, silver, copper and other metal cable, the fiber optic cable has no recycling value generally. A certain number of fibers form the cable core according to a certain way, and the cable core is protected by a jacket even some cable core has a coated layer outside. And these factors (fibers, jacket and coated layer) make up the fiber optic cable. The common fiber optic cable specification includes the 8/125μm, 9/125μm, 10/125μm , 50/125μm, 62.5/125μm, 100/140μm and 200/230μm. The