Experimental study on damage to detector system of three HgCdTe （PC type）units irradiated by CW 3.8μm laser

In this paper, the experimental results that detector system of three PC HgCdTe units is destroyed by 3.8μm laser are reported and analyzed qualitatively. Researches indicate that components of detector system which are Ge window, filter and detectors are destroyed when laser power density reaches 411W/cm2. Analyses show ablation heat is the most important reason of detector system damage in this experiment.