A Low-Cost FDM System for Multi-Longitudinal Mode Fiber Laser Sensor Array

被引：12
作者：
Zhang, Yunlong [1 ]
Chen, Xuefeng [1 ]
Zhang, Jintao [1 ]
Yu, Xiujuan [1 ]
Li, Kun [1 ]
Cheng, Qian [2 ]
Liu, Shengchun [1 ,3 ]
机构：
[1] Heilongjiang Univ, Coll Phys Sci & Technol, Harbin 150080, Peoples R China
[2] Tongji Univ, Inst Acoust, Shanghai 210092, Peoples R China
[3] Univ Michigan, Dept Biomed Engn, Ann Arbor, MI 48109 USA
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2015年 / 27卷 / 20期
基金：
中国国家自然科学基金;
关键词：
Fiber Bragg gratings; fiber lasers; multiplexing; optical fiber sensors; BEAT-FREQUENCY; OPTIC SENSORS; STRAIN;
D O I：
10.1109/LPT.2015.2456053
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A low-cost and real-time frequency division multiplexing system is proposed based on multi-longitudinal mode fiber laser sensor array and beat signal demodulation technology. The lasers have staggered cavity lengths with corresponding mode spacing. Beat signals of the longitudinal modes of each laser in the array are detected by a common detector. A relationship is worked out between the maximum multiplexing number of the sensors and maximum detectable frequency. A multiplexing array with four laser sensors is investigated experimentally and its potential application for strain measurement is also demonstrated. In the proposed multiplexing system, only one common photodetector and a commercial frequency analyzer are used to monitor all sensors simultaneously, which greatly decreases the cost of the system and makes it more competitive in large-scale monitoring field.
引用
收藏
页码：2186 / 2189
页数：4
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