Radiation hard diamond laser beam profiler with subnanosecond temporal resolution

A two-dimensional detector array has been fabricated from a single 10-mm-diam by 100-μm-thick chemical vapor deposition diamond disk by applying a 1×1 mm2 metallization grid of 4×4 pixels with centered bias connections. This diamond has been exposed to high power pulsed laser radiation. It has been shown that this kind of diamond array operates as a radiation hard, ultrafast laser beam profiler and can obtain spatial profiles with 500 ps temporal resolution. Ten spatial profiles were obtained within a single 5 ns duration laser pulse, revealing in detail the temporal and spatial development of the laser beam intensity. No attenuation is necessary for this profiler when making single-shot measurements at intensities up to ∼100 MW/cm2.