Directional Bend Sensing With Bragg Gratings in All Solid Bragg Fibers

Fiber Bragg gratings have been inscribed in all solid Bragg fibers by use of 800-nm femtosecond radiations, multiple attenuation dips are observed in the transmission spectrum. The spectral characteristics and bend responses of such gratings are investigated. The peak wavelengths of these dips show zero-sensitivity when the fiber is bent under a wide curvature, while the transmitted power exhibits different trends with high sensitivity and strong direction dependence. These proposed gratings are very attractive candidates for bend sensing and they show a real potential for applications in multiparameter sensors.

[1]  Sonali Dasgupta,et al.  Experimental demonstration of spectral broadening in an all-silica Bragg fiber. , 2009, Optics express.

[2]  Shizhuo Yin,et al.  Multiple parameter vector bending and high-temperature sensors based on asymmetric multimode fiber Bragg gratings inscribed by an infrared femtosecond laser. , 2006, Optics letters.

[3]  L. M. N. Amaral,et al.  Strain and Temperature Discrimination Using Modal Interferometry in Bragg Fibers , 2010, IEEE Photonics Technology Letters.

[4]  Jacques Albert,et al.  Sensitivity of photonic crystal fiber modes to temperature, strain and external refractive index. , 2008, Optics express.

[5]  Yuji Matsuura,et al.  Surface-plasmon resonance sensor using silica-core Bragg fiber. , 2009, Optics letters.

[6]  Bo Liu,et al.  Spectral characteristics and bend response of Bragg gratings inscribed in all-solid bandgap fibers. , 2007, Optics express.

[7]  Tzong-Jer Yang,et al.  Band-rejection fiber filter and fiber sensor based on a Bragg fiber of transversal resonant structure. , 2008, Optics express.

[8]  Michael A. Davis,et al.  Fiber grating sensors , 1997 .

[9]  Faramarz Farahi,et al.  Temperature and strain insensitive bending measurements with D-type fibre Bragg gratings , 2001 .

[10]  Jian Ju,et al.  Directional Bend Sensing With a CO $_{2}$-Laser-Inscribed Long Period Grating in a Photonic Crystal Fiber , 2009, Journal of Lightwave Technology.

[11]  J M Baptista,et al.  Highly birefringent photonic bandgap Bragg fiber loop mirror for simultaneous measurement of strain and temperature. , 2011, Optics letters.

[12]  Jens Kobelke,et al.  Sensing properties of fiber Bragg gratings in small-core Ge-doped photonic crystal fibers , 2009 .