Compression of nonamplified femtosecond pulses using nonlinear organic fibers

Abstract
It is shown that a 39 fs output pulse from a colliding-pulse mode-locked cw dye laser is directly compressed to 22 fs, without amplification, using a highly nonlinear 4-(N, N-dimethylamino)-3-acetamidonitrobenzene single-crystal cored fiber followed by a dispersive delay line of a grating pair.