Optical splitters can be divided into box-type optical splitters, tray-type optical splitters, rack-mounted optical splitters, wall-mounted optical splitters, etc. according to the different application scopes. The box-type optical splitter is generally used for optical fiber distribution boxes, etc.; the tray-type optical splitter is generally used in the ODF optical fiber distribution frame and optical cable transfer box in the equipment room, etc.; the rack-type optical splitter is installed in a standard rack; the wall-mounted optical splitter can be Mounted on the wall.

Optical splitters can be divided into two types: fused taper splitters and planar waveguide (PLC) splitters according to different manufacturing processes. Among them, planar waveguide splitters (PLC) are widely used in FTTx and PON. The fused taper type optical splitter is formed by fusing two or more optical fibers on the side; the planar waveguide type optical splitter (PLC) is a micro-optical component type product, which uses photolithography technology to form an optical waveguide on a medium or semiconductor substrate. Implement branch assignment function. The splitting principles of these two types of optical splitters are similar, and they both achieve different sizes of branches by changing the mutual coupling (coupling degree, coupling length) of the evanescent field between the fibers and changing the fiber radius.

In addition, the spectroscopes are classified into 1×2, 1×4, 1×8, 1×16, 1×32, 1×64 and other spectroscopes according to the different splitting ratios. [Note: On the semiconductor stencil, the "Y"-shaped waveguide coupler is carved out by photolithography technology, and these "Y" waveguides are connected together to form step-by-step light splitting, which can achieve 1×2, 1×4, 1× 8, 1×16, 1×32, 1×64, etc. 】

Faced with the many types of optical splitters above, how to choose? We can first determine the application occasion, and choose the appropriate beam splitter according to the actual needs. For example, in the application occasion where there are few branches and the light wavelength is not sensitive (that is, only 1×2 or 1×4 is enough), the melting taper type is selected. Optical splitter; if it is used in FTTH and other occasions that require multiple wavelengths (that is, more than 1×4), choose a planar waveguide (PLC) optical splitter, because the planar waveguide (PLC) optical splitter has consistent light splitting and uniform channels.