A four-stage laser system was developed, emitting at a wavelength of $6450\mathrm{nm}$ with a $3–5\mathrm{ns}$ pulse duration, $⩽2\mathrm{mJ}$ pulse energy, and $1∕2\mathrm{Hz}$ pulse repetition rate. The laser system successfully ablated rat brain tissue, where both the collateral damage and the ablation rate compare favorably with that previously observed with a Mark-III Free-Electron Laser.

© 2007 Optical Society of America

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