Design for optical coupler in high-power diode end-pumped solid-state lasers

A couple system including collimation, shaping and focusing parts has been designed for the pumping demand of Nd:YVO4 laser, based on the analysis of the beam output characteristic of high power laser diode line array and the wave-front theory. A practical result for the design is given out. Tests about the performance of the coupler system have been carried through. It is proved that this couple system is successfully used and can lead to high transition efficiency and fine quality laser beam.