Optical fiber splice is used full automatic special equipment -- welding device ( Fusion Splitter ) and two sections of cable need to be connected are respectively connected to the optical fiber, welding with short arc burning two fiber end which are connected into one body, the connecting method joint has the advantages of small volume, high mechanical strength, fiber optic splice after stable performance, which are widely used.

After the light transmitted to the fiber optic splice joints would produce a certain loss called splice loss or splice loss.

The quality of the optical fiber splice effects of optical fiber line transmission loss of optical fiber line passenger limit, no relay amplifying transmission distance and other parameters,

Therefore asked the fiber loss of fusion joint as small as possible, in order to ensure the transmission quality of signals in optical fiber CATV. At present, the majority of welding method can make weld damage mice are less than 0.1dB, can be less than 0.05
DB level, on the specific fiber CATV engineering project, according to the specific circumstances such as a fiber optic line trunk length, light
Apparatus for transmitting power and receiver sensitivity and system quality and determine each optical fiber connector allows the splicing loss value, will be
The splice loss index in relevant technical documents should be clearly defined. Optical fiber CATV transmission lines each relay
Long line transmission loss should also be defined, because all optical fiber joint weld after measuring optical fiber transmission line
Quality index is line of optical fiber transmission loss, the requirements of the indexes in the 0.25dB/km following (including splice loss
Consumption). Because the optical fiber CATV transmission network is the direction of development of broadband data services network, the fiber joint weld
Splice loss and optical line transmission loss due to high demand, especially in some optical fiber CATV trunk network, such as the length of 18
00km connects the province's 13 provincial cities is a double-ring structure for the transmission of radio and television programs for the main business of Jiangsu radio
TV optical fiber transmission trunk network, required in the 1550nm window line of optical fiber transmission loss shall not exceed 0.23dB / km,

An optical fiber splice splice loss shall not exceed the maximum value of the current 0.06dB.

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