Research on Performance Parameters and Testing Methods of Near-Infrared Photo-Detectors

The study focuses on the performance parameters of near-infrared photo-detectors and their measurement methods to standardize and refine testing technology. It introduces methods for responsivity, detectivity, and response time. Direct measurement methods are highly accurate but complex and harsh, while indirect methods are easy but lack uniform standards in the near-infrared optical band. The detection rate is measured indirectly using noise voltage size and phase-locked amplification technology for improved accuracy. Response time measurement methods include frequency response and impulse response methods, with frequency response having high accuracy but limited applicability and impulse response being intuitive but requiring high bandwidth. Future parameter measurement technology will focus on high precision and fast test development.