M. Nakazawa et al., CONTINUUM SUPPRESSED, UNIFORMLY REPETITIVE 136 FS PULSE GENERATION FROM AN ERBIUM-DOPED FIBER LASER WITH NONLINEAR POLARIZATION ROTATION, Electronics Letters, 29(15), 1993, pp. 1327-1329
A new type of femtosecond erbium-doped fibre laser with nonlinear pola
risation rotation is presented, in which a polariser is installed at a
point-symmetric position against a polarisation-sensitive optical iso
lator in the ring laser cavity. This technique enables us to remove th
e continuum (DC component) in the oscillation waveform completely and
to obtain a stable pulse train as short as 136-145 fs with a 56 MHz re
petition rate.