Abstract

A practical method of achieving a high-brightness and high-power fiber-coupled laser-diode device is demonstrated both by experiment and ZEMAX software simulation, which is obtained by a beam transformation system, free-space beam combining, and polarization beam combining based on a mini-bar laser-diode chip. Using this method, fiber-coupled laser-diode module output power from the multimode fiber with 100 μm core diameter and 0.22 numerical aperture (NA) could reach 174 W, with equalizing brightness of $14.2\mathrm{MW}/({\mathrm{cm}}^2·\mathrm{sr})$. By this method, much wider applications of fiber-coupled laser-diodes are anticipated.

© 2015 Optical Society of America

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