2X2 plastic fibre-optical coupler and its preparation method

This invention relates to a 2X2 plastic fiber coupler and preparation method. It includes the plastic fiber, and its characteristics rely in that the plastic fiber is fixed on the quadrate organic glass sheet through the epoxy resin of the melting segment of the two melting plastic fibers, and the two ends still maintain the original shape of the plastic fiber; the melting segment and the fixed connected organic glass sheet are in the metal tube, and connect at the two ends of the metal tube through epoxy resin. The preparation method is to put the two plastic fibers into the clamp apparatus, melt a segment through ultrasonic melt, and use epoxy resin to fix the melting segment on the organic glass, and then put the organic glass sheet with the plastic fiber into the metal tube, and seal the two ends of the metal tube with epoxy resin. This invention has simple structure and simple preparation process, and the manufacturing method is simple and fast, and the adding wastage is low and the light splitting of the coupler is stable.