What are the types of splitters? How to choose a spectroscope?
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 different application ranges. Box-type optical splitters are generally used in optical fiber distribution boxes, etc.; tray-type optical splitters are generally used in ODF optical fiber distribution frames and optical cable transfer boxes in the computer room; rack-mounted optical splitters are installed in standard racks; wall-mounted optical splitters can be Install on the wall.
According to different manufacturing processes, optical splitters can be divided into two types: fusion tapered optical splitter and planar waveguide (PLC) optical splitter. Among them, the planar waveguide optical splitter (PLC) is widely used in FTTx and PON. The fusion tapered beam splitter is formed by fusion splicing two or more optical fibers on the side; the planar waveguide beam splitter (PLC) is a micro-optical component type product that uses photolithography technology to form an optical waveguide on a dielectric or semiconductor substrate. Realize branch assignment function. The splitting principles of these two types of optical splitters are similar. They both achieve different branch amounts by changing the evanescent field coupling between the fibers (coupling degree, coupling length) and changing the fiber radius.
In addition, the spectroscope is divided into 1×2, 1×4, 1×8, 1×16, 1×32, 1×64, etc., according to the difference in the splitting ratio. [Note: On the semiconductor engraved board, the "Y"-shaped waveguide coupler is engraved by photolithography technology, and these "Y" waveguides are connected together to form a step-by-step light splitting, which can realize 1×2, 1×4, 1× 8. Split ratio of 1×16, 1×32, 1×64, etc.
How to choose among the many types of optical splitters mentioned above? We can first determine the application situation and choose the appropriate splitter according to the actual needs. For example, in the application where there are few branches and the light wavelength is not sensitive (that is, only 1×2 or 1×4 is enough), choose the fusion taper type. Optical splitter: If it is used in FTTH and other applications that require multiple wavelengths (that is, 1×4 or more), choose a planar waveguide (PLC) beam splitter, because the planar waveguide (PLC) beam splitter has uniform light splitting and uniform channels.
