Abstract

In extension to known concepts of wavelength-multiplexing diode laser arrays, a new external cavity is presented. The setup simultaneously improves the beam quality of each single emitter of a standard 25 emitter broad-area stripe laser bar and spectrally superimposes the 25 beams into one. By using this external resonator in an “off-axis” arrangement, beam qualities of $M_{\text{slow}}^2<14$ and $M_{\text{fast}}^{\text{\hspace{0.17em} 2}}<3$ with optical powers in excess of $10\text{\hspace{0.17em} W}$ in cw operation are obtained.

© 2006 Optical Society of America

980 nm high brightness external cavity broad area diode laser bar

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