Fiber transverse plane coupler

The utility model relates to a fiber transverse plane coupler, belonging to the field of laser technology application. The fiber transverse plane coupler comprises a double cladding optical fiber, a pumped fiber and a semiconductor laser pumped source, wherein an output end of the semiconductor laser pumped source is coupled with one end of the pumped fiber, the other end of the pumped fiber contacts with one end of the double cladding optical fiber in a fully optical manner and is welded together with the double cladding optical fiber, and the transverse plane of the pumped fiber and a vertical axial plane of the pumped fiber form a certain angle. The fiber transverse plane coupler can effectively pump the double cladding optical fiber, and also prevent damage to the pumped source caused by signal light leakage, thereby protecting the pumped source and improving service life of the pumped source.