Research On Multi-window Fiber Laser Warning System

With the application of laser widely, laser detection and laser detection is essential for laser application technology. Through timely and accurate detection of the incoming laser on the complex environment, the system determines the direction of the incoming laser, issues laser signals, takes appropriate measures, and it is important. Based on the analysis of the current all detection principle of laser detection system, combination of project requirements to achieve the technical indicators, the paper proposed a multi-window fiber laser detection system.First, the paper analyzed the basic principles of laser detection technology, according to technical specifications requirements, comparing the characteristics of various types of laser detection system, designed the multi-window fiber laser detection system with large Numerical Aperture (N.A.) energy transfer optical fiber taper. Analyzed the design of the multi-window fiber laser detection system in detail, and its performance calculation, simulation and experimental under the design.The paper demonstrated the design plan of using large Numerical Aperture (N.A.) energy transfer tapered optical fiber to increase the Field of View (FOV). Design the connections of optical fiber, optical detectors and the overall structure, and the recognition algorithm of the incoming laser, completed the plan of the multi-window acquisition and fiber probe, designed response circuit and the recognition algorithm.Simulation of pulsed laser in the laboratory, experiment the aspects of the laser energy, incident direction, the field division for testing the feasibility of the program. Finally, the actual outdoor laser detection experiments with laser rangefinder, the system can be effective detection the pulsed laser of 850nm, 1064nm, 1650nm (pulse width 10ns), angle resolution level of 30°, vertical 30°.