Optical Vernier Effect in Fabry-Perot Interferometers Based on Ultra-Short Fiber Bragg Gratings

被引:1
作者
Pereira, Luis [1 ]
Varum, Humberto [2 ]
Antunes, Paulo [3 ,4 ,5 ]
机构
[1] Univ Aveiro, Inst Nanostruct Nanomodelling & Nanofabricat I3N, P-3810193 Aveiro, Portugal
[2] Univ Porto, Fac Engn, Dept Civil Engn, Struct Div,CONSTRUCT,LESE, P-4200465 Porto, Portugal
[3] Univ Aveiro, i3N, P-3810193 Aveiro, Portugal
[4] Univ Aveiro, Dept Phys, P-3810193 Aveiro, Portugal
[5] Univ Aveiro, Inst Telecomunicacoes, P-3810193 Aveiro, Portugal
关键词
Fabry-Perot interferometers; fiber Bragg gratings; optical fiber sensors; optical Vernier effect; TEMPERATURE; STRAIN;
D O I
10.1109/LPT.2024.3350349
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
The optical Vernier effect (OVE) generated by optical fiber Fabry-Perot interferometers (FPIs) has gain emphasis for sensing applications due to the high sensitivities and resolutions these devices can achieve. Here, we experimentally demonstrate the production of cascaded intrinsic FPIs with amplified sensitivity by the OVE, using ultra-short fiber Bragg gratings (USFBGs) inscribed with a Nd:YAG laser system. This method is an alternative solution with great versatility and repeatability, which can improve the production and dissemination of devices with enhanced sensitivity. Three sensing devices are proposed, and their viability is demonstrated, where different magnification factors and operation bandwidths are presented. Strain and temperature tests were performed to the proposed sensors, demonstrating sensitivity magnifications of about 25 and 42 when compared with a single USFBG-based FPI. These sensors have great potential in terms of production and sensing applications, by allying the main advantages of the FBG technology with the OVE.
引用
收藏
页码:254 / 257
页数:4
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