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Dual-rod Yb:YAG laser for high-power and high-brightness applications

2000; Linguagem: Inglês

10.1364/assl.2000.ma6

Eric C. Honea, Raymond J. Beach, Scott C. Mitchell, J.A. Skidmore, M.A. Emanuel, Steven B. Sutton, Stephen A. Payne, P. V. Avizonis, Robert S. Monroe, D. G. Harris,

Laser Design and Applications

We describe a diode-pumped Yb.YAG laser producing 1080 W cw with 27.5% optical-optical efficiency and 532 W Q-switched with M 2 =2.2 and 17% optical-optical efficiency. The laser uses two composite Yb.YAG rods separated by a 90 degree quartz rotator for bifocusing compensation. A microlensed diode array end-pumps each rod using a hollow lens duct for pump delivery. By changing resonator parameters, we can adjust the fundamental mode size and the output beam quality. Using a flattened gaussian intensity profile to calculate the modefill efficiency and clipping losses, we compare experimental data to modeled output power vs beam quality.