Abstract

We report successful energy scaling of a room-temperature femtosecond ${\mathrm{Cr}}^{4+}$: forsterite laser by using a single-walled carbon nanotube saturable absorber (SWCNT-SA). By incorporating a q-preserving multipass cavity, a repetition rate of 4.51 MHz was realized, and the oscillator produced 121 fs, 10 nJ pulses at 1247 nm, with an average output power of 46 mW. To the best of our knowledge, the peak power of 84 kW is the highest generated to date from a SWCNT-SA mode-locked oscillator. Furthermore, energy scaling of a femtosecond multipass-cavity laser, mode-locked using a SWCNT-SA, is demonstrated for the first time.

© 2012 Optical Society of America

Mode-locked self-starting Cr:forsterite laser using a single-walled carbon nanotube saturable absorber

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