摘要
提出了一种基于线性调频激光器的外差测距实验理论,设计了一个较为具体的测距方案,利用延时光纤将两束特性相同、但进行了延时的线性调频激光进行混频,测出其拍频后的频率值,进而得到其中包含的频率信息,并用Matlab-Simulink仿真对此方案进行了仿真测试和实际光纤延时验证,通过模拟线性调频信号和线性调频外差测距的实验过程,分别对300、600、900 m处的线性调频激光回波信号和本振信号进行外差拍频,得到相应的拍频值,其结果与理论计算结果基本吻合。
A ranging measurement based on Linear Frequency Modulated Continuous Laser（LFMCL）heterodynes method was investigated and the system of distance measurement was designed. Mixed the two linear frequency modulated laser beams of the same characteristics which were delayed by delay fiber in different time. Then get the frequency value which contains the ranging information, and simulated by Matlab-Simulink. By the procedure of the linear FM signal and simulation of the linear FM heterodyne ranging, get the the frequency difference of the heterodynes in the distance of 300 meter,600 meter and 900 meter, the results show that simulation makes a coincidence with the theoretical arithmetic.
出处
《红外与激光工程》
EI
CSCD
北大核心
2015年第6期1779-1783,共5页
Infrared and Laser Engineering
基金
国家自然科学基金(61078063)
