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We report 6 kW pump limited power handling in a 7+1 to 1 Pump-Signal Combiner. The high pump transmission efficiency of 98% and optimal thermal management of the combiner package enables a low thermal slope of 0.0037 C/W measured up to 6 kW of pump power. The low thermal slope allows for a potential 9 kW pump power handling capacity of the 7+1 to 1 combiner.
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L. Bansal, J. Pincha, R. Sienkowski, C. Neale, J. Mann, J. W. Nicholson, "6 kW power handling in a 7+1 to 1 pump-signal combiner," Proc. SPIE 12402, Components and Packaging for Laser Systems IX, 1240207 (17 March 2023); https://doi.org/10.1117/12.2649274