All-Fiber Laser Curvature Sensor Using an In-Fiber Modal Interferometer Based on a Double Clad Fiber and a Multimode Fiber Structure

被引:20
作者
Alvarez-Tamayo, Ricardo I. [1 ]
Duran-Sanchez, Manuel [2 ]
Prieto-Cortes, Patricia [3 ]
Salceda-Delgado, Guillermo [3 ]
Castillo-Guzman, Arturo A. [3 ]
Selvas-Aguilar, Romeo [3 ]
Ibarra-Escamilla, Baldemar [4 ]
Kuzin, Evgeny A. [4 ]
机构
[1] Univ Autonoma Nuevo Leon, CONACYT FCFM, Av Univ S-N,Ciudad Univ, Nuevo Leon 66455, Mexico
[2] Inst Nacl Astrofis, CONACYT Opt Dept, Opt & Elect,LE Erro 1, Puebla 72824, Mexico
[3] Univ Autonoma Nuevo Leon, FCFM, Av Univ S-N,Ciudad Univ, Nuevo Leon 66455, Mexico
[4] Inst Nacl Astrofis Opt & Electr, Opt Dept, LE Erro 1, Puebla 72824, Mexico
关键词
fiber optic laser sensor; modal in-fiber interferometer; curvature measurement; erbium-doped fiber laser; REFRACTIVE-INDEX MEASUREMENT; CORE FIBER; INTERFERENCE; TEMPERATURE;
D O I
10.3390/s17122744
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
An all-fiber curvature laser sensor by using a novel modal interference in-fiber structure is proposed and experimentally demonstrated. The in-fiber device, fabricated by fusion splicing of multimode fiber and double-clad fiber segments, is used as wavelength filter as well as the sensing element. By including a multimode fiber in an ordinary modal interference structure based on a double-clad fiber, the fringe visibility of the filter transmission spectrum is significantly increased. By using the modal interferometer as a curvature sensitive wavelength filter within a ring cavity erbium-doped fiber laser, the spectral quality factor Q is considerably increased. The results demonstrate the reliability of the proposed curvature laser sensor with advantages of robustness, ease of fabrication, low cost, repeatability on the fabrication process and simple operation.
引用
收藏
页数:11
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