KEYWORDS: Semiconductor lasers, Sensors, Avalanche photodetectors, Modulation, Prisms, Signal detection, Receivers, High power lasers, Interference (communication), System identification
Laser identification of friend or foe system use laser wave radiated by high-power semiconductor laser as carrier wave for transmitting signal, and it is cooperative system which is carrying wave can return. The modulating return wave of the system uses reflection prism are stable, when the detectors of all-oriented photoelectric receiver detect the key-code of identification of friend or foe, electrical machinery will drive the reflecting prism to revolve in order to form modulating return wave. To inspect reliable return wave signal and solve strong background lights disturb as well as adapts to changeable detecting technique problem of APD photo-electric detector, the system adopts obscure noise compensation and signal identification technique controlled by computer in APD photo-electric system.
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