Abstract

Two ${\mathrm{Yb}}^{3+}$-doped $\mathrm{KY}{\left({\mathrm{WO}}_4\right)}_2$ regenerative amplifiers, one end pumped by two 1.6-W single-stripe diodes at 940 nm and the other side pumped by one 20-W diode bar at 980 nm, are demonstrated. When the regenerative amplifiers are injected, $40‐\mathit{\mu }\mathrm{J}$, 400-fs and $65‐\mathit{\mu }\mathrm{J}$, 460-fs pulses at a 1-kHz repetition rate are obtained following compression from the end- and side-pumped amplifiers, respectively.

© 2002 Optical Society of America

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