Optical Radiation Characteristics of Laser-Induced Air Plasma and Jamming CCD Imaging Detector

We studied the characteristics of laser-induced air plasma optical radiation and jamming the imaging CCD detector. Optical emission spectra of the air plasma ranged from 400 to 700 nm are composed of individual spectral lines superposing on continuous radiation, while the continuum radiation is mainly due to bremsstrahlung and recombination radiation. The jamming threshold of the CCD imaging detector jammed by optical radiation of the laser-induced air plasma is 3.98 × 1010 W/cm2. With increasing laser intensity, the plasma expansion volume and spectral intensity will increase, the image quality of the CCD detector will deteriorate, and the jamming area on the CCD detector will become larger. The experimental results indicate that the jamming effect of laser-induced plasma radiation on CCD detectors can overcome the shortcomings of a single-wavelength laser use, which is important for improving the optoelectronic jamming effect.