We demonstrated, for the first time, sub-100-fs lasers based on an Yb-doped apatite crystal: Yb<sup>3+</sup>:SrY<sub>4</sub>(SiO<sub>4</sub>)<sub>3</sub>O, also called Yb:SYS. Pulses as short as 94-fs have been obtained at 1070 nm with an average power of 110 mW. We also developed a regenerative amplifier based on this crystal, and obtained 100μJ, 420-fs pulses following compression.

© 2003 Optical Society of America

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