DOUBLE-CORE LIGHT-CONDUCTING FIBER, PROCESS FOR PRODUCING THE SAME, DOUBLE-CORE FIBER LASER, AND DOUBLE-CORE FIBER AMPLIFIER

摘要

The invention is directed to a double-core light-conducting fiber comprising apump core (22), a laser core (24) which is arranged centrically in the pumpcore(22), and a cladding (26) surrounding the pump core (22). It is characterizedin thatthe pump core (22) which is constructed with a substantially circular crosssectionhas at least-one ground portion (28) on the outside which extends in the lightdirection of the double-core light-conducting fiber (20) and amounts to 1% to49% ofthe diameter of the pump core (22).The invention is further directed to a process for the production of thedouble-core light-conducting fiber and to a double-core fiber laser and to adouble-core fiber amplifier which use the double-core light-conducting fiberaccording to theinvention. The substantially round pump core (22) with its centricallyarranged lasercore (24) enables a simple connection with other fiber-optic components and asimple coupling in of the pumping light.