Refractive Index Sensing System Based on Fiber Laser Intracavity Modulation with a Low Detection Limit

被引：0
作者：
Zhang Chao [1 ,2 ,3 ]
Xu Degang [1 ,2 ,3 ]
Shi Jia [1 ,2 ,3 ]
Zhong Kai [1 ,2 ,3 ]
Li Xujin [3 ]
Xiong Jianbo [4 ,5 ]
Wang Shengnian [4 ,5 ]
Ren Yuchen [1 ,2 ]
Chen Linyu [1 ,2 ]
Li Changzhao [1 ,2 ]
Liu Tiegen [1 ,2 ]
Yao Jianquan [1 ,2 ]
机构：
[1] Tianjin Univ, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China
[2] Tianjin Univ, Key Lab Optoelect Informat Technol, Minist Educ, Tianjin 300027, Peoples R China
[3] Pilot Natl Lab Marine Sci & Technol Qingdao, Joint Lab Ocean Observat & Detect, Qingdao 266237, Shandong, Peoples R China
[4] CCCC Fourth Harbor Engn Inst Co Ltd, Guangzhou 510230, Guangdong, Peoples R China
[5] Minist Commun, Key Lab Harbor & Marine Struct Durabil Technol, Guangzhou 510230, Guangdong, Peoples R China
来源：
CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG | 2018年 / 45卷 / 12期
关键词：
sensor; refractive index sensing system; detection limit; intracavity modulation; fiber laser;
D O I：
10.3788/CJL201845.1210003
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A fiber sensing system based on laser intracavity modulation with a low detection limit for refractive index sensing is proposed. A kind of all-fiber multimode interference structure based on single-mode-no-core-single-mode fiber is inserted in a fiber laser ring cavity as a loss-modulation device. The fiber laser intracavity modulation technology is used to obtain high-sensitivity sensing signal with high signal-to-noise ratio and narrow full width at half maximum. Depend on these characteristics, the low detection limit of the sensing system can reach up to 7.3X10 RIU. The sensing system with output stability and low temperature cross-sensitivity has a great potential in high-accuracy biochemical sensing and marine environmental monitoring.
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页数：8
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