an optical diffuser plate disposed between a flashlamp and a solide state laser within a solid state laser pump chamber . the optical diffuser plate acts as a homogenizer of the pump light to reduce pumping inhomogeneities inherent with specular reflectors , while at the same time providing an efficient energy transfer from the flashlamp to the solid state laser . the optical diffuser plate can also filter out pump light below critical wavelengths that can be detrimental to the solid state laser .