  We present the next-to-leading order QCD corrections to the production of a
photon pair in association with one or two jets. This class of processes
constitutes an important background for Higgs physics at the LHC. For the one
jet process we include photon fragmentation contributions and perform a
comparison between different photon isolation criteria and various isolation
parameters. The two jet calculation has been performed using a smooth cone
isolation criterion. We find that the NLO QCD corrections are substantial and
can lead to distortions of differential distributions.
