Fabrication of periodic structures in optical fibers by femtosecond laser micromachining for sensing applications

被引：2
|
作者：
Viveiros, Duarte [1 ,2 ]
Maia, Joao M. [1 ,2 ]
Amorim, Vitor A. [1 ,2 ]
Jorge, Pedro A. S. [1 ,2 ]
Marques, P. V. S. [1 ,2 ]
机构：
[1] INESC TEC, Ctr Appl Photon, Rua Dr Roberto Frias, P-4200465 Porto, Portugal
[2] Univ Porto, Sci Fac, Dept Phys & Astron, Rua Campo Alegre, P-4169007 Porto, Portugal
来源：
FOURTH INTERNATIONAL CONFERENCE ON APPLICATIONS OF OPTICS AND PHOTONICS | 2019年 / 11207卷
关键词：
Femtosecond laser system; fiber Bragg gratings; fiber optics sensor;
D O I：
10.1117/12.2527261
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 femtosecond laser direct writing system was developed to explore the fabrication of periodic structures in optical fibers. The possibility to write type I first- and second-order Bragg gratings in the same single-mode fiber (SMF-28e), with reflectivities of 99.6 % and 59.3 %, respectively, is presented. The fabrication of structures (waveguides and grating) in a coreless and in a SMF-28e fiber was first demonstrated, and the gratings were then exposed to a thermal annealing up to 1000 degrees C. The FBG inscribed in the SMF-28e fiber presents thermal stability at temperatures of 800 degrees C and a temperature sensitivity of 14.34 pm/degrees C was determined.
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页数：6
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