量子点红外探测器在空间光电系统中的应用

Application of quantum dot infrared photodetectors in space photoelectric systems

为了更好地开发和利用空间资源,各国竞相通过向空间发射卫星、空间站、航天飞机等航天器来建立探测站点和通信网络以占据具有最大优势的位置,其中空间光电系统在探索新资源方面起到关键的作用.点对点的距离远、空间辐射强、温差较大等空间环境因素严重影响着光电系统性能的发挥,也向空间光电系统的稳定性和可靠性提出了挑战.本文提出将具有较高的探测灵敏度、工作温度、抗辐射能力和响应带宽的新型量子点红外探测器应用于空间光电系统,阐述了量子点红外探测器的基本工作原理和优点,并讨论了量子点红外探测器在空间应用的技术要求,分析了其在空间的激光雷达、卫星光通信和成像或者非成像系统中的应用.

Space environment and space resources have become a new field of competition among countries, and this field is to be developed. To achieve these purposes, some countries have established the detection sites and communication network by launching satellites, space stations, space shuttles and other spacecrafts into the space. Photoelectric systems in space play a crucial role in developing new fields and exploring new resources. Presently, the space environment factors including point-to-point long distance, intense space radiation, large temperature difference challenge the high requirements of the stability and reliability for the optoelectronic system. A new type of technology with quantum dot infrared photodetector, which may be used in the space, is proposed, which potentially provides higher detectivity,operation temperature, radiation tolerance, responsive bandwidth, etc. The basic working principle and the advantages of the quantum dot infrared photodetectorare discussed. And the basic technical requirements for the quantum dot infrared photodetector in space application are pointed out. Finally, feasible applications of the quantum dot infrared photodetector in the field of space laser radar, satellite optical communications and imaging system are analyzed.