Abstract
Using two high-brightness laser diodes as pump sources, brightness-maintaining focusing optics, and an antiresonant Fabry–Perot saturable absorber (A-FPSA)1,2 as a low-loss saturable absorber, we obtained self-starting 45-fs pulses (Fig, 1) with 60 mW of average power mode locked. This demonstrates what is to our knowledge the shortest pulse ever obtained from a diode- pumped Cr:LiSAF laser. This laser has half the pulse width and a greater output power then was achieved in our previously published diode-pumped Cr:LiSAF work.3 The shortest-ever-demonstrated Cr:LiSAF laser (33 fs) used a diffraction-limited pump source.4
© 1995 Optical Society of America
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