2\mu m Solid-State Laser Mode-locked By Single-Layer Graphene
  We report a 2\mu m ultrafast solid-state Tm:Lu2O3 laser, mode-locked by single-layer graphene, generating transform-limited~410fs pulses, with a spectral width~11.1nm at 2067nm. The maximum average output power is 270mW, at a pulse repetition frequency of 110MHz. This is a convenient high-power transform-limited laser at 2\mu m for various applications, such as laser surgery and material processing. 
A. A. Lagatsky, Z. Sun, T. S. Kulmala, R. S. Sundaram, S. Milana, F.   Torrisi, O. L. Antipov, Y. Lee, J. H. Ahn, C. T. A. B...
cond-mat.mes-hall cond-mat.mtrl-sci physics.optics