A method and apparatus for characterizing an optical pulse using a reduced complexity
chronocyclic tomography is described. In one example, an optical pulse train is
modulated using quadratic temporal phase modulation. A first spectral intensity
of the optical pulse train is measured after a quadratic temporal phase modulation
having a first amplitude. A second spectral intensity of the train of optical pulses
is then measured in response to the quadratic temporal phase modulation having
a second amplitude. At least one of the group delay and the spectral intensity
associated with the train of optical pulses is computed using the first spectral
intensity and the second spectral intensity.
