A device for translating the frequency of the energy contained in a laser beam. Higher order Raman scattering is utilized to convert the energy in a laser beam into a collimated beam of radiation at a frequency removed from that of the original beam by an amount corresponding to the frequency shift exhibited...http://www.google.se/patents/US4280109?utm_source=gb-gplus-sharePatent US4280109 - Efficient frequency converter utilizing higher order Stokes-Raman scattering
