The Response Time Analysis of PIN Photodiode Based on Light intensity

In the PIN photodiode applications,we found that the intensity of illumination has a major effect on the response speed.In this paper,the effect of light intensity and the response speed relation was discussed in detailed.It presents an internal PIN junction equivalent electric field model,and sets an experimental circuit of PIN photodiode under different light intensity to detect the response speed.Response time will be shorter when lighting and the response time will be longer when stopping lighting in highlight.The result gives a basis for high speed application in PIN photodiode,and it is helpful for further improving PIN photodiode response speed.