Lee Byeong Ha, Cheong Jaehee, Paek Un-Chul
Opt Lett. 2002 Jul 1;27(13):1096-8. doi: 10.1364/ol.27.001096.
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.
我们测量了由单个、双个和三个相同光栅组成的级联长周期光纤光栅的光谱偏振相关损耗，这些光栅是通过在光纤一侧暴露紫外激光束制造的。测量是使用穆勒矩阵方法扫描入射光束的波长进行的。随着级联光栅数量的增加，偏振相关损耗显著增加。讨论了光纤光栅中紫外诱导几何双折射的形成及其与级联光栅形成的精细干涉条纹的关系。
