Abstract

Mode-locked operation of a simple $\mathrm{Yb}:\mathrm{KGW}$ (potassium gadolinium tungstate) oscillator is described, providing $10\mathrm{W}$ at $1039\mathrm{nm}$ with a $290\mathrm{fs}$ pulse width. A polarization-coupled scheme is used for efficient longitudinal pumping by a pair of reshaped laser diode bars. With changes in cavity dispersion, the pulse width is adjustable from 134 to $433\mathrm{fs}$, in a high-quality circular mode. A saturable absorber mirror provides self-starting operation, and the cavity is stabilized by the Kerr-lens effect.

© 2006 Optical Society of America

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