Abstract

We present a diode-pumped, double-clad Yb:YAG waveguide laser that contains an integrated section of a Cr4+:YAG saturable absorber for passive Q switching. Using two 4-W polarization-coupled, broad-striped diode-pumped lasers, we obtained 30µJ pulses of 1.6-ns duration at repetition rates of as much as 77 kHz. The slope efficiency was 50% with respect to absorbed pump power, with a maximum output average power of 2.3 W and a peak power of 18 kW. The output beam was single lobed, with M2 values as great as 1.5×1.3. We also demonstrate a passively Q-switched Nd:YAG waveguide laser of similar design, operating at 1.064 µm and 946 nm.

© 2002 Optical Society of America

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