DocumentCode :
1403710
Title :
Spectral Properties of Locally Pressed Fiber Bragg Gratings Written in Polarization Maintaining Fibers
Author :
Botero-Cadavid, J.F. ; Causado-Buelvas, J.D. ; Torres, P.
Author_Institution :
Sch. of Phys., Nat. Univ. of Colombia, Medellin, Colombia
Volume :
28
Issue :
9
fYear :
2010
fDate :
5/1/2010 12:00:00 AM
Firstpage :
1291
Lastpage :
1297
Abstract :
In this work, we analyze the spectral properties of locally pressed fiber Bragg gratings (FBGs) written into polarization maintaining fibers. We study the evolution of the spectral response of a FBG written into a PANDA fiber when the central region of the grating is perturbed by a diametrical load. Due to the complex structure of the fiber, a finite element model was carried out to determine the strain distributions generated at the center region of the fiber core, and hence taking the induced change in refractive index as the change in effective refractive index due to the applied load. Once the shifting in Bragg wavelength and the optical principal axes of the loaded region are known, a modified transfer matrix method is applied to calculate the spectral response of the FBG. We have found experimentally and by numerical simulations that the reflected spectra for the grating exhibit a narrow and tunable polarization-dependent spectral hole. The tuning of this spectral hole is dependent of the magnitude and the angle of the applied force over the optical fiber.
Keywords :
Bragg gratings; finite element analysis; optical fibre polarisation; optical transfer function; optical tuning; reflectivity; refractive index; Bragg wavelength shifting; PANDA fibre; fiber core; finite element model; locally pressed fiber Bragg grating; modified transfer matrix; numerical simulation; optical fiber; optical principal axes; polarization maintaining fibers; polarization-dependent spectral hole tuning; refractive index; spectral properties; spectral reflection; spectral response; strain distribution; Fiber Bragg grating; finite element method; optical fiber device; phase shifts; polarization maintaining fiber;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2010.2040804
Filename :
5406112
Link To Document :
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