  We report soliton rains in a tuneable Tm-doped fiber laser mode locked by
carbon nanotubes. We also detect their second- and third-harmonic. We achieve a
tuneability of over 56nm, from 1877 to 1933nm, by introducing a
polarization-maintaining isolator and two in-line polarization controllers.
This makes our system promising as a tuneable filter for ultrafast
spectroscopy.
