  Fiber lasers operating via Raman gain or based on rare-earth doped active
fibers are widely used as sources of CW radiation. However these lasers are
only quasi-CW: their intensity fluctuates strongly on short time-scales. Here
the framework of the complex Ginzburg-Landau equations, that are well known as
an efficient model of mode-locked fiber lasers, is applied for the description
of quasi-CW fiber lasers as well. The first ever vector model of a Raman fiber
laser describes the experimentally observed turbulent-like intensity dynamics,
as well as polarization rogue waves. Our results open debates about the common
underlying physics of operation of very different laser types - quasi-CW lasers
and passively mode-locked lasers.
