According to the principle of optical splitter can be divided into fused biconical taper and planar waveguide two, fused biconical taper is product of two or more fiber side fused into planar waveguide; optical element is the product, using lithography, an optical waveguide formed on the medium or on a semiconductor substrate, a branch distribution function. Optical principle of these two types are similar, they die by changing the fiber coupling (coupling, coupling length) and change the fiber radius to achieve different size and branch biomass, can also be multiple light signals into one signal synthesizer called. Optical fiber couplers due to the production method is simple, cheap, easy to connect with an external optical fiber as a whole, and can withstand the advantages of mechanical vibration and temperature changes, at present, become the market mainstream manufacturing technology.

FBT is two (or two) to remove the fiber coating by a certain method depend on the high temperature heating, melting, and stretching to both sides, eventually forming a special waveguide structure of double cone form in the heating zone, by controlling the fiber twist angle and tensile length can be divided into light the proportion of different. The tapered region for curing adhesive on the quartz substrate into the stainless steel tube, which is the optical splitter. The production process for curing adhesive coefficient of thermal expansion and quartz substrate, stainless steel tube is not consistent, temperature changes in the environment, thermal expansion and contraction of the degree of inconsistency, this situation can easily lead to optical splitter damage, especially the optical branch located in the field even more, it is also easy to damage the main optical branch the reason. For the splitter production more channels can be composed of a plurality of two splitters.