The fiber is mainly divided into the fol lowing two categories:
1) transmission module class
Transfer point modulus classification of single- -mode fiber(Single Mode Fiber) and multimode fiber (Multi Mode Fiber). Thefiber core diameter fiber is very small, the working wavelengthgiven only to single mode transmi ssion, wide bandwidth, largetransmission capacity. Multimode fiber in the working wavelength is given,fiber energy is transmitted through multiple modes simul taneously. Compared with the single-modefiber, multimode fiber transmission performance.
2) refractive index distribution
The refractive index distribution of optical fiber can bedivided into jump type optical fiber and tapered fiber. Thejumping type fiber core refractive index and protective layerrate is a constant. In the core and the protective layer of theinterface, the refractive index is the step change. Refractiongradient type optical fiber core radius increase with the rateaccording to a certain rule in the core is reduced, and theprotective layer at the junction of the protective layer forreducing the refraction rate. Change the refractive index ofthe fiber core is similar to parabola.
