The standard of "G.657 Bend Attenuation Insensitive Single Mode Optical Fiber Cable Characteristics for Access Network" is a standard issued by ITU-T in November 2006.
G.657 fiber is the latest fiber variety developed on the basis of G.652 fiber to achieve the goal of fiber to the home. The most important feature of this type of fiber is its excellent bending resistance, and its bending radius can achieve 1/4 to 1/2 of the bending radius of conventional G.652 fiber. G.657 fiber is divided into two sub-categories A and B. The performance and application environment of G.657A fiber are similar to those of G.652D fiber. C, L5 working bands) work; G.657B fiber mainly works in 1310nm, 1550nm and 1625nm 3 wavelength windows, which is more suitable for realizing FTTH information transmission and installation in narrow places such as indoors or buildings.
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