Damage effect on CCD detector irradiated by 500 fs laser pulse

A 250 μJ, 500 fs ultra-short laser pulse was used to radiate linear array CCD detector. The whole responding from linear, saturation, cross talk and totally damaged was observed. Theoretical analyses were made to explain the damage mechanism. The experiment shows that the saturated energy threshold of CCD element is 0.45 μJ/cm2. The CCD is damaged by six pulses with energy density of 0.14 J/cm2 and the damage is due to lattice heat and evaporation with plasma. When the laser energy density is 1.41 J/cm2, the output waveform of CCD detector is unrecognizable for single pulse and there is no output for two pulses. The damage mechanism is considered to be Coulomb force of electric field from charge separation.