Generation and direct measurement of giant chirp in a passively mode-locked laser.
We evaluate the shape and chirp of nanosecond pulses from a fiber laser passively mode locked with a nanotube-based saturable absorber by using a synchronously scanning streak camera and a monochromator to directly measure the pulse spectrogram. We show that the stable sech(2) output pulse possesses a predominantly linear chirp, with a residual quartic phase and low noise. Comparison with analytical mode-locking theory shows a good quantitative agreement with the master equation mode-locking model.
Kelleher
E J R
EJ
Femtosecond Optics Group, Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, UK. edmund.kelleher08@imperial.ac.uk
Travers
J C
JC
Ippen
E P
EP
Sun
Z
Z
Ferrari
A C
AC
Popov
S V
SV
Taylor
J R
JR