摘要
为了在激光告警中实现全方位角度探测，并且在一定探测精度的前提下尽量使结构简单、稳定，提出了基于偏振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不同起偏角的偏振片编码，再将各个方向的光纤耦合成一束，经准直透镜组射入解偏光路中，通过判断电路分析得到激光入射方向。在计算及仿真了经偏振片后激光能量的衰减，求解电路能检测到最弱激光的幅值与偏振衰减最大时激光引起的响应电流的幅值的关系，得到在激光角分辨率为30°时满足探测要求。实验显示，在初始激光功率在20～150mW的条件下，每20°划分的偏振角度中设定最小识别电压为20mV时，满足全方位激光方向探测的要求。
For detection of the all-directional angle in the laser warning with the simple structure and stabilized performance, laser direction measurement method based on thepolarization code optical fiber antenna was proposed. This method is to lay the polarizing code of the different polarizing eyepiece angle in the different direction. Then, each direction＇s optical fiber was coupled into a bunch of optical fibers： After the focusing collimation set of lenses injection solution leaning path of rays, the laser incidence direction was obtained through the judgment circuit analysis. In calculating and the simulating the polarizing laser energy attenuation, the solved electric circuit could examine the response electric current peak-to-peak value relation which was caused by the laser when the weakened polarization is biggest and the laser is weakest. The survey requirements were satisfied when the laser angular resolution is 30°. The experiment demonstrates that the smallest recognition voltage is 20mV in each 20~ division＇s polarization angle when original laser power is from 20 mV to 15020mV, which meets the requirements of all-directional laser direction survey.
出处
《光电工程》
CAS
CSCD
北大核心
2010年第2期60-64,共5页
Opto-Electronic Engineering
基金
国家自然科学基金资助项目(60572019)
博士学科点科研基金项目(20070110004)
中北大学青年科学校基金项目
关键词
激光告警
偏振编码
光纤天线
传能光纤
laser warning
polarizing coding
optical fiber antenna
transmission fiber
