High-efficiency single-pass solitonlike compression of Raman radiation in an optical fiber around 14 μm

Highly efficient conversion (as great as 60%) into the broad first Stokes Raman band around 1.4 microm the 90-psec pump pulses from a cw mode-locked Nd:YAG laser at 1.32 microm has permitted, through a solitonlike compression mechanism in a single span of standard (lambda(0) = 1.3 microm) single-mode optical fiber, the generation of highly stable pulses of ~100 fsec, with average powers of ~30 mW in the solitary waves, which depend on fiber length and pump power.