用于单芯光纤传感的特性相位生成载波技术  

Characteristic phase generated carrier technology for the single-core fiber optic sensing

作　　者：肖倩[1] 贾波[1] 吴媛[1] 卞庞[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《仪器仪表学报》2014年第1期36-42,共7页Chinese Journal of Scientific Instrument

基　　金：国家973计划(2010CB327805);科技支撑计划(2011BAF06B01);上海市科委项目(10251211500;11142200500)资助

摘　　要：在分布式单芯光纤振动传感系统中,采用相位生成载波调制解调技术,可以消减散射光寄生干涉的影响,提高测量距离。提出了一种与传统相位生成载波调制技术不同的特性调制解调技术,该技术在解调时无需参考信号,易于实现异地解调,突破了传统相位生成载波技术因需要与载波同源的参考信号,而在远离调制端的干涉信号输出端难以进行解调的问题。该技术特别适用于长距离的分布式探测,具有很强的实用性。The phase generated carrier （PGC） technology could be used in the single core vibration distributed inter- ferometric optical fiber sensor to increase the sensing distance through reducing the effect of the parasitic interference generated by the scattered light along the sensing fiber. In this paper, a characteristic PGC modulation and demodula- tion technology is presented, which is different from the traditional one. In this type of PGC technology, the reference signal is not needed for the demodulation, which makes it feasible to demodulate the signal in a remote place away from the modulation site. The proposed technology is especially suitable for long distance distributed detection and has high practical application vale.

关 键 词：分布式光纤传感器 干涉 相位生成载波 单芯 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置] TH744[自动化与计算机技术—控制科学与工程]