Journal
OPTICS LETTERS
Volume 27, Issue 13, Pages 1096-1098Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.27.001096
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We have measured the spectral polarization-dependent losses of cascaded long-period fiber gratings composed of single, double, and triple identical gratings and fabricated by exposure of a UV laser beam on one side of a fiber. The measurement was made by use of the Mueller matrix method for scanning the wavelength of the incident beam. The polarization-dependent loss was dramatically increased as the number of cascaded gratings was increased. The formation of the UV-induced geometric birefringence in the fiber grating and its relationship to the fine interference fringes formed by cascading gratings are discussed. (C) 2002 Optical Society of America.
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