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 a pump core (22), a laser core (24) which is arranged centrically in the pump core (22), and a cladding (26) surrounding the pump core (22). It is characterize d in that the pump core (22) which is constructed with a substantially circular cross section has at least-one ground portion (28) on the outside which extends in the lig ht direction of the double-core light-conducting fiber (20) and amounts to 1% t o 49% of the diameter of the pump core (22). The invention is further directed to a process for the production of th e double-core light-conducting fiber and to a double-core fiber laser and to a double- core fiber amplifier which use the double-core light-conducting fiber according to the invention. The substantially round pump core (22) with its centrically arranged laser core (24) enables a simple connection with other fiber-optic components and a simple coupling in of the pumping light.