Phase coherence and extreme self phase modulation

P. Kinsler,

    Blackett Laboratory, 
    Imperial College London,
    Prince Consort Road,
    London SW7 2AZ,
    United Kingdom.

    arXiv:0708.4112

I study how pulse to pulse phase coherence in a pulse train can
survive super-broadening by extreme self phase modulation (SPM). 
Such pulse trains have been used in phase self-stabilizing schemes
as an alternative to using a feedback process.  However, such
super-broadened pulses have undergone considerable distortion, and
it is far from obvious that they necessarily retain any useful phase
information.  I propose measures of phase coherence applicable to
such pulse trains, and use them to analyze numerical simulations
comparable to self-stabilization experiments.