Lifting polarization degeneracy of modes by fiber design: a platform for polarization-insensitive microbend fiber gratings
Optics Letters, Vol. 30, Issue 21, pp. 2864-2866 (2005)
http://dx.doi.org/10.1364/OL.30.002864
Acrobat PDF (77 KB)
Abstract
Polarization dependence in microbend gratings is an inherent problem, even in perfectly circular fibers, since antisymmetric modes are almost degenerate linear combinations of four distinct, polarization-sensitive modes. We demonstrate a novel fiber design that lifts polarization degeneracies of the antisymmetric modes to solve this problem. By intentionally exacerbating the polarization splittings, we achieve coupling to only the polarization-insensitive doublet, over wavelength ranges exceeding 100 nm, thus demonstrating a device with practical usable bandwidths. This allows all previous applications envisaged with UV-induced long-period gratings to be realized with the significantly lower-cost microbend technology platform.
© 2005 Optical Society of America
OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2400) Fiber optics and optical communications : Fiber properties
(230.5440) Optical devices : Polarization-selective devices
ToC Category:
Fiber Optics and Optical Communications
Citation
S. Ramachandran, S. Golowich, M. F. Yan, E. Monberg, F. V. Dimarcello, J. Fleming, S. Ghalmi, and P. Wisk, "Lifting polarization degeneracy of modes by fiber design: a platform for polarization-insensitive microbend fiber gratings," Opt. Lett. 30, 2864-2866 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-21-2864
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