Some Nonlinear Properties of Pulse Propagation
Nonlinear properties of pulse propagation are considered in relation to frequency pulling and pushing of the average carrier frequency of pulses applied off-resonance from the center of absorbing and emitting lines. The average frequency is analyzed as a function of distance of propagation. Some characteristics of propagating pulses in purely homogeneously broadened absorbers are discussed. By means of optical path delay and phase shift, zero-area pulses from a ruby laser are observed to propagate through many absorption lengths in a resonant inhomogeneously broadened ruby sample with anomalously large power outputs.