POTASSIUM bromide has a crystal structure similar to that of rocksalt ; but as the ions in the former are heavier, the Raman frequency ... fuller elucidation of the nature of this spectrum.

The schematic diagram [Figure (b)] shows that the Stokes beam is modulated with an electro-optic modulator (EOM, M350-160 KD*P, Conoptics) at a couple of MHz by using a square-wave function-generator ...