Dark Current Measurement and Noise Correction Method for LWIR QWIP Detection System Based on Focal-Plane Temperature

The performance of long-wave infrared (LWIR) quantum well (QWIP) detection systems is seriously affected by the dark current detectors. Tiny variations in focal-plane temperature devices cause fluctuations current, which turn generate temporal noise. It difficult to measure accurately after detector assembly packaged. To address above problems, a QWIP measurement method based on proposed, as reduce First, response model LWIR system was established, and introduced. Then, components were introduced, chiller calibration experiments carried out, values at different temperatures measured combining design parameters. Next, noise correction target data collected, out correct them. Finally, calculation, reduced 57.69% correction, proof significant effect. This can obtain real-time value collecting data, (difficult eliminate using conventional methods), beneficial for promoting application QWIPs remote sensing detection.