H01S 3/1086

Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling a device placed within the cavity using a non-linear optical device, e.g. exhibiting Brillouin- or Raman-scattering {using scattering effects, e.g. Raman or Brillouin effect}