Efficient operation of a diode-pumped multi-watt continuous wave Yb:KYW laser with excellent beam quality

A diode end-pumped Yb:KYW laser with 9 W of output power operating at 1045 nm wavelength with the highest slope efficiency of 77.9% when compared to all other diode-pumped Yb:KYW/KGW lasers is reported. The average beam quality (M 2) was 1.07 and the best optical-to-optical efficiency achieved was 36% with respect to the incident pump power.

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