The Study Of Radiation Effect On The Performance And 1/f Noise Of Laser Diode

Compare with microwave communication, satellite optical communication has a larger information capacity, a smaller antenna and better security. It has been considered as an important research direction of future intersatellite communication. Laser diode, as the light source of satellite optical communications, is very important for optical communications systems. All of the devices that work in space should take account of the radiation effect because of the radiation environment of space. So the research on the radiation effect of laser diode and how to protect the device from the radiation is also very important for satellite communication.Research on radiation effect of devices used in space usually has three steps: theory of radiation effect, experiment research of radiation effect and choosing the device with good radiation resistance. Based on the analysis of the research situation on radiation effect and 1/f noise in and abroad, we did some work as follows:In this paper, we derived the optical response model of transient ionization effect from the model of photocurrent caused by ionization effect, and then introduced the total dose effect of radiation on threshold current and output power of laser diode.We carried out the radiation and temperature experiment of laser diode emitting at 1310nm, and analyzed the experiment result such as threshold current, output power,differential efficiency…1/f noise is a new method with a lot of advantages to select the device with good radiation resistance and to show the radiation effect, but there is still a lot of work to do both on theory and experiment. In this paper, we derived the model of 1/f noise after radiation, and explained the experiment results that already exit.