Light amplification in a disordered Raman medium

摘要

The amplification of a probe beam by stimulated Raman scattering in a disordered medium was experimentally investigated. The measurements were performed in Ba(NO3)2 powders with 532-nm pumping and a 563-nm Raman generated probe. The results are described by Monte Carlo simulations with reasonable scattering parameters. The relatively large excitation volume, low loss, and greatly reduced spontaneous emission effects in barium nitrate make it an ideal candidate for a scattering gain medium in coherent backscattering.