Research on high-power single emitter fiber-coupled diode laser

The paper investigates a fiber-coupled method based on single emitter diode laser mounted on copper sub-heatsink by steps and mirror model. The output beam collimated with aspherical cylindrical lens and cylindrical lens in the fast and slow axis directions could be coupled into a fiber of 100 m core diameter and 0.22 numerical aperture. The measurement result shows that the continuous wave(CW) fiber output power can achieve 21.8 W, brightness is 1.83 MW/(cm2sr) and the total coupling efficiencies are 70.32% at operation currents of 7.0 A.