Raman laser
英[ˈrɑ:mən ˈleizə]美[ˈrɑmən ˈlezɚ]
A Raman laser is a specific type of laser in which the fundamental light-amplification mechanism is stimulated Raman scattering. In contrast, most "conventional" lasers (such as the ruby laser) rely on stimulated electronic transitions to amplify light.