APT system is the key technology in free space optical communication system, and acquisition and tracking detector is the key component in PAT system. There are several candidate detectors that can be used in PAT system, such as CCD, QAPD and CMOS Imager etc. The characteristics of these detectors are quite different, ie the structures and the working schemes. This paper gives thoroughly compare of the usage and working principle of CCD and CMOS imager, and discuss the key parameters like tracking error, noise analyses, power analyses etc. Conclusion is given at the end of this paper that CMOS imager is a good candidate detector for PAT system in free space optical communication system.
Zhi Liu, Zhi Liu,
"Research on application of several tracking detectors in APT system", Proc. SPIE 6027, ICO20: Optical Information Processing, 60272S (20 January 2006); doi: 10.1117/12.668300; https://doi.org/10.1117/12.668300