A Calculation of Minimal Detectable Power of Laser Radar in Space

In this paper, the noise of receiver and its probability distribution are analysed, and the spectrum of outer space is calculated. Then, a new way to calculate minimal detectable power of laser radar is given, which is deduced on the base of signal detection and two statistic concepts:false alarm rates and detection probabilities. System simulation proves the minimal detectable power calculated by this method can optimize the laser radar system.