【作者】 刘智超；

【导师】 张记龙；

【作者基本信息】 中北大学 ， 信息处理与重建， 2010， 硕士

【摘要】 随着激光越来越广泛的应用,激光测距与激光告警已是激光应用中不可或缺的方向之一。通过及时准确地对复杂战场环境中来袭激光进行探测,确定其入射方向,发出检出信号并采取相应措施具有重要意义。本文在分析了目前所有激光告警系统的探测原理的基础上,结合项目要求实现的技术指标,提出了多窗口光纤激光告警系统。首先,论文分析了激光告警技术的基本原理,根据设计要求,在比较了各种类型激光告警系统的特点的基础上,采用大数值孔径锥形传能光纤设计了多窗口光纤激光告警系统。详细的分析了多窗口光纤激光告警系统的设计,并根据设计对其性能进行了计算、仿真及实验。论证了采用大数值孔径传能光纤及锥形光纤头设计增加单个光学探头视场的设计方案。设计了光纤、光电探测器、整体结构的连接方式及入射激光识别算法,完成了多窗口采集方案、光纤光学探头、响应电路及识别算法。在实验室模拟技术指标中要求探测的脉冲激光,从激光能量、入射方向、视场划分等多个方面反复实验,验证了方案的可行性。最后,在户外进行激光测距系统实际脉冲激光探测实验,得出该系统对850nm、1064nm、1650nm脉冲激光(脉宽10ns)可有效探测,角度分辨率水平30°,俯仰30°。更多还原

【Abstract】 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°.更多还原