Temporal and spatial distribution characteristics of crosstalk line generated by irradiating CCD with nanosecond pulse laser

Abstract

To investigate how a short-pulse laser impacts a charge coupled device (CCD), a laser with a 532 nm wavelength and an 8 ns pulse duration was employed to irradiate the CCD. Images formed by targeting representative CCD locations with a nanosecond pulse laser at various delay intervals were documented. Laser spots become visible in the resulting images if the CCD is exposed to the laser before the process of the readout transfer is completed. The count of saturated pixels in the laser spot, as the laser fluence rises, can be categorized into three parts. In addition, owing to the effect of channel barriers between adjacent vertical charge-transport channels, the length of the crosstalk line in the vertical direction is greater than that in the horizontal direction, and the difference becomes more obvious with increasing laser fluence. Moreover, the dimensions of the crosstalk lines were estimated theoretically. Besides, the experimental findings indicate that the spatial arrangement of the laser spot and the crosstalk line are influenced by two factors: the irradiation location and the delay duration. Nevertheless, the influences of the two elements on the spatial arrangement of the laser spot are separate, whereas their impacts on that of the crosstalk line are interconnected.