Silica-taper array for beam shaping of high power laser diode bar

A low-cost, easy producing and novel beam shaping system for concentration and homogenization of a high power laser diode bar (LDB) beam is demonstrated by experiment and simulation. It consists of a silica-taper array (beam shaper) and a silica-taper (beam integrator) which are fabricated by using chemical etching technique. By using this device, the output beam of LDB is reshaped to a small spot with uniform intensity and angular distributions, and could be coupled into a 200 μm silica fiber.