We describe the generation of enhanced pulse energies using a multipass-cavity (MPC) laser, pumped by inexpensive, single spatial mode laser diodes. A semiconductor saturable absorber was used for stable mode-locked operation. The MPC reduced the pulse repetition rate to the level, scaling pulse energies and intensities. With only of absorbed pump power, pulses with energies of and peak powers of , corresponding to of average power at a repetition rate of , were generated. By increasing the intracavity negative dispersion, pulses with energies of and peak powers of , corresponding to of average power at repletion rate, were also generated. These results demonstrate that low-cost MPC -doped colquiriite lasers can generate pulse energies and intensities comparable to more expensive Ti:sapphire lasers.
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