We report what we believe to be the first results on short-pulse generation in Yb3+ :silica fiber. By applying the stretched pulse technique in a unidirectional, polarization-switch Yb3+ fiber laser incorporating a prism-based dispersive delay line, we obtain self-start mode locking and 100-pJ pulses that can be compressed to give clean chirp-free <100-fs pulses. We believe such sources to have great potential for use not only in all-solid-state, high-power femtosecond pulse systems based on Yb3+ :silica glass but also as seeds for conventional Nd3+ :glass amplifier chains.
© 1997 Optical Society of America
V. Cautaerts, D. J. Richardson, R. Paschotta, and D. C. Hanna, "Stretched pulse Yb3+silica fiber laser," Opt. Lett. 22, 316-318 (1997)