OPTICAL FIBER TYPE OPTICAL-COUPLER COUPLING EDF AND COMMON OPTICAL FIBER

摘要

PURPOSE: An optical fiber type photo coupler into which EDF(Erbium Doped Fiber) and general optical fiber are combined is provided to be capable of remove the loss due to connection by directly combining the EDF and general optical fibers to fabricate a WDM photo coupler. CONSTITUTION: The general optical fiber(6) and the EDF(1) are extended while being fused by external heat after being twisted by 180 deg. At this time, light(7) incident to the optical fiber(6) and light incident to the EDF(1) are combined. In this state, the input and output of the photo coupler are formed of the EDF(1), whereby the connection loss in connection between the EDF and optical fiber(6) is basically removed and a connection reinforcement portions for reinforcing the connection point can be removed.