Abstract: erage power Nd:YAG lasers are increasinglyinteresting for industrial applications such asdrilling and machining. Diode pumping of this solidstate medium offers longer services intervals, reducedthermal optical distortions, higher system efficiencyand more compact packaging than lamp pumping. Thezigzag slab geometry is well suited for applicationswhere the average power exceeds a few hundred watts anda good beam quality is desired, particularly if thelaser pumping level is to be varied. We present thestatus of our latest upgrade to our (originally 300watt$+1$/) diode pumped slab laser. In what follows wefirst describe the diode pump source. We then discussthe zigzag slab laser design and its presentperformance. !6
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