| WU Shu-hui,JIN Wa,BI Wei-hong,LI Xia,ZHANG Lin-ke,JIN Yun.A robust salinity sensor based on encapsulated long-period grating in microfiber[J].Optoelectronics Letters,2020,16(6):418-422 |
| A robust salinity sensor based on encapsulated long-period grating in microfiber |
| Author Name | Affiliation | | WU Shu-hui | Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China | | JIN Wa | Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China | | BI Wei-hong | Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China | | LI Xia | Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China | | ZHANG Lin-ke | Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China | | JIN Yun | Department of Mechanical and Electrical Engineering, Hebei Construction Material Vocational and Technical College, Qinhuangdao 066004, China |
|
| Abstract: |
| A robust fiber sensor for salinity measurement based on encapsulated long-period grating in microfiber is proposed. The long-period grating is fabricated in microfiber by inducing periodical deformation with CO2 laser, which is then encapsulated in a holey capillary tube. The encapsulation tube is designed to effectively protect the microfiber from external interference, but does not change the optical properties of the fiber and the response speed of the sensor, which makes the sensor more robust for real applications. Experimental results show that the sensor can achieve a sensitivity of 2.16 nm/% with a good linearity for concentration from 0% to 20%. It is theoretically proved that the sensitivity can be further improved by optimizing the diameter parameters. Such structure may be used as low loss evanescent-wave-coupled optical absorption, fluorescent and gain cells, photoacoustic cells, and etc. |
| Hits: 892 |
| Download times: 0 |
|
| View Full Text Download reader |
|
|
|
