物理学报Issue(10)：1-6,6.DOI:10.7498/aps.63.100602
基于二次偏振调制的变频测距方法与系统实现∗
Variable frequency range finding technology based on double p olarization mo dulation metho d and system implementation
摘要
Abstract
Traditional laser range technology has a poor phase measurement accuracy and an additional phase of the system, which restricts the improvement of its accuracy. In this article, by using the technology of variable frequency measure-ment based on double polarization modulation the phase shift range-finding technology is improved. With the method of double polarization modulation, the demodulation of the phase information is directly implemented on the phase modulator, which can make the system simpler. The variable frequency technology is used to replace the traditional phase discrimination technology; therefore the measurement accuracy of the system will not be persecuted with the phase crimination any more. The theoretical curve of sine (cosine) relation between modulation frequency and output light intensity is proved experimentally. Owing to the fact that the stability of frequency can be better than 10−6, the measurement accuracy can reach ±10.6 µm@4.5 m. By using this system to measuring a 200 m-long fiber, the clear curve of modulation frequency versus output of system is obtained.关键词
激光测距/变频测距/二次偏振调制Key words
laser distance measurement/variable frequency distance measurement/double polarization modulation引用本文复制引用
黑克非,于晋龙,王菊,王文睿,贾石,吴穹,薛纪强..基于二次偏振调制的变频测距方法与系统实现∗[J].物理学报,2014,(10):1-6,6.基金项目
国家重点基础研究发展计划(批准号:2012CB315704)和高等学校博士学科点专项科研基金(批准号:20120032120029,20120032130010)资助的课题.@@@@ Project supported by the State Key Development Program for Basic Research of China (Grant No.2012CB315704) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant Nos.20120032120029,20120032130010) （批准号:2012CB315704）
