| 摘要 |
<p>Apparatus for homogenization of emission spectra of a gain medium in laser systems, comprising at least an optical arrangement for spatially dispersing spectral components like prisms (18) or gratings (19), a passive selective attenuator (4), which is arranged in the path of a spatially displaced spectral components so that it could induce selective attenuation for spectral components having highest gain and largest amplification. Said passive selective attenuator comprises material featuring non-linear optical attenuation, such as multi- photon absorption, frequency conversion, Kerr-effect or similar. Said selective attenuator selectively attenuates those spatially displaced spectral components, having highest gain in the emission spectra of a gain medium, thus increasing the usable bandwidth. The passive attenuator may be a GaN specimen.</p> |
