Multiple Pulse Chirping in Self-Induced Transparency
The interest in phase modulation of short optical pulses has continually increased in the last few years. In this note we will restrict ourselves to the first order theory of steady-state pulses. That is to say, we will work in the common “slowly varying” approximation according to which the envelope and the phase of the pulse vary very little within an optical cycle[la,c,d]. This approach leads to the prediction that the single optical pulses (solitons) propagating in linear absorbers must show no phase modulation. It predicts also the possible existence of a variety of non-chirped as well as chirped pulse trains. Here we will present a unified view of this problem.
KeywordsCarrier Frequency Nonlinear Absorber Bloch Vector Resonant Medium Resonant Atom
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