Stimulated raman scattering in chaotic fields

A. T. Georges

Yu. S. Oseledchik

A. T. Georges

A theory is presented for forward- and backward-stimulated Raman scattering of colored chaotic light in dispersive media. Both amplification of a coherent Stokes seed and spontaneous generation are treated. It is shown that group-velocity dispersion reduces the gain for the average Stokes intensity, while the intensity fluctuations in the pump enhance it. For a given bandwidth, chaotic light is scattered more efficiently than coherent light when its average intensity exceeds the critical intensity for overcoming the decorrelating effects of group-velocity dispersion on the pump and Stokes waves. The figures presented demonstrate the asymmetry in the intensity of forward and backward Raman scattering of nonmonochromatic light.

A. Laubereau

Marek Trippenbach, Cao Long Van

The cross-correlation functions of a Stokes wave and the laser field of an arbitrary bandwidth in the process of stimulated Raman scattering were studied. The laser light was described as a stationary Gaussian stochastic process. A normalized second-order intensity cross-correlation function has been obtained both in transient and in steady-state limits. It exhibits an asymmetry with respect to zero, which is due to the buildup of Raman gain. We propose the functional method to be used in calculating the higher-order correlations.

Pavel A Apanasevich, D. N. Ordabaev