1. An optical beam diagnostic device comprising: one or more sets of coherent optical fiber bundles, each set of coherent optical fiber bundles including one or more individual optical fiber bundles, wherein a first end of each individual optical fiber bundle is positioned to receive optical information from one or more optical beams around an imaging plane; and a second end of the coherent optical fiber bundles is arranged to transmit the optical information to an optical sensor capable of simultaneously detecting light transmitted from the second ends of each of the individual optical fiber bundles.