Patent ID: 6047011
Filing Date: 2000-04-04
Classification: G02F,H01S

Abstract:
A system for generating an output beam of higher order harmonic radiation from an input beam of fundamental radiation comprising;a first sample of non linear optical material for receiving the input beam and generating output radiation comprising beams of fundamental and higher order harmonic radiation,means for separating the beams of fundamental radiation and higher harmonic radiation output from the first sample,at least one further sample of non linear optical material, wherein the first and further samples are arranged in series, each further sample having associated means for increasing the intensity of radiation incident on the further sample and means for separating beams of fundamental and higher order harmonic radiation output from the further sample, wherein selected beams of radiation output from each of the first and further samples pass through the subsequent sample in the series and generate further beams of fundamental and higher order harmonic radiation,characterised in that the apparatus further comprises a stimulated Brillouin scattering (SBS) cell and at least one Brillouin amplifier for coherently combining the output beams of higher order harmonic radiation.