Phase-Shifted Fiber Bragg Grating by Selective Pitch Slicing

被引:0
|
作者
Robalinho, Paulo [1 ,2 ]
Piaia, Vinicius [1 ]
Soares, Liliana [1 ,2 ]
Novais, Susana [1 ]
Ribeiro, Antonio Lobo [3 ]
Silva, Susana [1 ]
Frazao, Orlando [1 ]
机构
[1] INESC TEC Inst Syst & Comp Engn Technol & Sci, P-4169007 Porto, Portugal
[2] Univ Porto, Fac Engn, R Dr Roberto Frias, P-4200465 Porto, Portugal
[3] Univ Fernando Pessoa, Fac Hlth Sci, P-4200150 Porto, Portugal
关键词
optical fiber sensor; phase-shift FBG; fabrication; OPTICAL-FIBER; FBG SENSOR; INSCRIPTION; FABRICATION; REFLECTION; VIBRATION; WRITTEN;
D O I
10.3390/s24216898
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
This paper presents a new type of phase-shifted Fiber Bragg Grating (FBG): the sliced-FBG (SFBG). The fabrication process involves cutting a standard FBG inside its grating region. As a result, the last grating pitch is shorter than the others. The optical output signal consists of the overlap between the FBG reflection and the reflection at the fiber-cleaved tip. This new fiber optic device has been studied as a vibration sensor, allowing for the characterization of this sensor in the frequency range of 150 Hz to 70 kHz. How the phase shift in the FBG can be controlled by changing the length of the last pitch is also shown. This device can be used as a filter and a sensing element. As a sensing element, we will demonstrate its application as a vibration sensor that can be utilized in various applications, particularly in monitoring mechanical structures.
引用
收藏
页数:11
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