title: Spectral polarization-dependent loss of cascaded long-period fiber gratings.
abstract: 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.
authors.forename: Byeong Ha
authors.initials: BH
authors.lastname: Lee
authors.forename: Jaehee
authors.initials: J
authors.lastname: Cheong
authors.forename: Un-Chul
authors.initials: UC
authors.lastname: Paek