Simultaneous measurement of multiparameters using a Sagnac interferometer with polarization maintaining side-hole fiber

被引：92
作者：
Frazao, O. [1 ]
Silva, S. O. [1 ]
Baptista, J. M. [1 ,2 ]
Santos, J. L. [1 ,3 ]
Statkiewicz-Barabach, G. [4 ]
Urbanczyk, W. [4 ]
Wojcik, J. [5 ]
机构：
[1] INESC, P-4169007 Oporto, Portugal
[2] Univ Madeira, Dept Matemat & Engn, P-9000390 Penteada, Funchal, Portugal
[3] Univ Porto, Fac Ciencias, P-4169007 Oporto, Portugal
[4] Wroclaw Univ Technol, PL-50370 Wroclaw, Poland
[5] Marie Curie Sklodowska Univ, PL-20031 Lublin, Poland
来源：
APPLIED OPTICS | 2008年 / 47卷 / 27期
关键词：
D O I：
10.1364/AO.47.004841
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A Sagnac interferometer with a section of a polarization maintaining side-hole fiber for multiparameter measurement is proposed. The sensor was experimentally demonstrated to be sensitive to torsion, temperature, and longitudinal strain, simultaneously The birefringence in the investigated side-hole fiber is induced simultaneously by the elliptical shape of a germanium-doped core and by field overlap with the air holes surrounding the core. The latter effect is purely geometrical and causes high chromatic dispersion of the group birefringence in the long wavelength range, which results in a different period of spectral interference fringes. A different wavelength response is obtained for each interference fringe peak when the fiber is subjected to torsion, temperature, or longitudinal strain. A matrix equation for simultaneous measurement of the three parameters-torsion, temperature, and longitudinal strain-is also proposed. (C) 2008 Optical Society of America
引用
收藏
页码：4841 / 4848
页数：8
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