Experimental investigation of the efficiency of phase conjugation of an XeCl laser beam by stimulated Brillouin scattering

An experimental investigation was made of the phase conjugation of an XeCl laser beam with spectral line widths of 2 and 0.4 pm as a function of the conditions of focusing of the beam in a heptane cell. A phase conjugation efficiency higher than 90% was achieved. It was found that, apart from the stimulated Brillouin scattering (STBS) component, the scattered beam also contained a second component without a frequency shift. Their ratio depended on the geometry used to couple the pump beam into the nonlinear medium and its intensity. Phase conjugation was achieved as a result of STBS.