Abstract

Non-parametric stimulated Raman scattering is well-established as a simple and efficient method of converting laser radiation to one or more lower (Stokes) frequencies. However, parametric Raman conversion to higher frequencies, or the simultaneous generation of multiple Raman lines, has generally been found to be much less efficient. We have shown that the collinear generation of higher orders, using beams whose frequency difference is resonant with the Raman transition and which are temporally symmetric (pulses of matching intensity and shape), has much greater potential. Considering hydrogen gas, the generation of a single multifrequency beam consisting of nearly 50 waves of comparable energy is feasible [1].

© 1996 Optical Society of America