Abstract

A new, highly efficient, scalable technique for cw high-power diode-array side pumping of gain media has been developed. The use of simple all-reflective optics permits diode emission collection efficiencies of >95%. We have achieved a cw TEM00 mode output (M2 < 1.1) of 13.1 W at 1.06 μm from a Nd:YAG rod pumped with 60 W of laser-diode output (808 nm), representing 22% conversion efficiency (29% conversion of absorbed pump power). Numerical simulations and experimental results indicate that good thermal management results in thermally induced aberrations of <λ/8 across the rod.

© 1994 Optical Society of America

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