摘要
为了在激光告警中实现实时、全方位角度探测,且在探测角精度确定的前提下使结构简单、稳定,提出了基于多窗口编码的光纤天线的测量方法。该方法是通过在不同方向上放置特制的大视场光纤接收端口,再将各个方向的光纤耦合到PIN探测器阵列上,通过探测电路分析得到激光入射方向。在实验室条件下,利用衰减后的窄脉冲激光器测试光纤接收角与接收电路。实验表明:光纤接收端的接收角在偏移±30°时信号强度衰减为0°入射的-3 dB。电路峰值保持电路的精度优于2%。本电路适用于探测1mW/cm2微弱窄脉冲激光,探测虚警率为0.15%,满足激光预警系统设计的要求。
In order to realize real-time and full-angle detection in laser warning system, and make the structure simple and stable under the condition of the precision of detection angle is determined, multi-window code fiberoptic antenna measurement method is proposed. The system sets special wide field fiber optic receiver ports in different directions, and then couples the fibers to PIN detectors. The direction of incidence laser is obtained by the detecting circuit. Under laboratory conditions, using attenuated narrow pulse laser to measure the optical fiber acceptance angle and acceptance circuits. Experimental results show that signal strength attenuated to --3 dB, compared with the 0° incidence angle, when the deflection angle was ±30°. Precision of peak hold circuit was surpasses 2 %. The circuit fitted for detecting weak narrow pulse laser （ 1 mW/cm2 ）, detection false rate was 0.15 % ,which can meet the design requirement of laser warning system.
出处
《传感器与微系统》
CSCD
北大核心
2010年第10期59-61,64,共4页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(60572019)
高等学校博士学科点专项科研基金资助项目(20070110004)
山西省留学人员科技活动择优计划资助项目
山西省高等学校拔尖创新人才计划资助项目
关键词
光电检测
光纤天线
窄脉冲激光
photoelectric detection
optical fiber antenna
narrow-pulse laser
