Service Life and Replacement of Fiber Optic Patch Cords

Ⅰ. The service life of fiber optic patch cords


Fiber optic patch cord is the most used fiber optic cable line equipment in the modern communication industry. Because of its long connection distance, low insertion loss, good repeatability and not a lot of return loss, it can support the work of multiple devices at the same time, and can be inserted into each other. Good performance, no heat, good temperature stability. Fiber optic patch cords are suitable for cable TV networks, telecommunication networks, computer optical fiber networks and optical test equipment.


Due to the needs of switching fiber optic patch cords and normal testing during maintenance, optical fiber connectors are often plugged and unplugged, which leads to the problem of plugging life, that is, the maximum number of times of plugging and unplugging.


This question should be based on the premise that under normal conditions of use, after a specified number of insertions and withdrawals, each component of the optical fiber connector has no mechanical damage, and the additional loss does not exceed the limit (usually the limit is specified as 0.2dB). The plugging life of a fiber optic connector is generally determined by the mechanical wear of the components.


At present, the plugging life of optical fiber connectors can generally reach more than 1000 times, and the additional loss does not exceed 0.2dB. For fiber optic connectors using slotted ceramic coupling sleeves, static fatigue will cause the sleeve to rupture due to crack growth in the ceramic material.


According to relevant information, the 20-year rupture probability of such unscreened sleeves is 10-4. If the screening test is performed with a screening force 2.6 times greater than the working stress, cracking will not occur within 20 years.


Ⅱ. What tools are needed to change the fiber optic patch cord FC to LC?


1. Cut off and re-splicing the LC pigtail.


2. Find a pigtail with one FC and one LC.


3. It is the optical fiber socket to buy a fiber jumper with one end of FC and one end of LC.


4. It is a pigtail head, one 2 LC jumper + one LC to FC flange is enough.


5. If welding, a welding machine is required.


Fiber patch cords are used to make patch cords from equipment to fiber optic cabling links. There is a thicker protective layer, which is generally used for the connection between the optical transceiver and the terminal box.


According to the different transmission media, fiber optic patch cords can be divided into common silicon-based fiber optic patch cords, single-mode and multi-mode fiber jumpers, and other fiber optic patch cords that use plastic as the transmission medium;


According to the structure of the connector, it can be divided into: FC jumper, SC jumper, ST jumper, LC jumper, MTRJ jumper, MPO jumper, MU jumper, SMA jumper, FDDI jumper, E2000 jumper, DIN4 jumper Jumper, D4 jumper and so on. The more common fiber jumpers can also be divided into FC-FC, FC-SC, FC-LC, FC-ST, SC-SC, SC-ST, etc.

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