Analysis of Transmission Characteristics of PFBG Based on FEM with 1st-order transparent boundary conditions

The transmission characteristics of a nonuniform photonic fiber Bragg grating (PFBG) are studied in detail by FEM furnished with 1 st - order BGT - like TBC and transfer matrix method. The effects of the air hole size on PFBG's transmission properties such as effective index, Bragg reflective wavelength, normalized bandwidth and centre wavelength shift are investigated. It is believed the study can provide useful information for PFBG's design and optimization with a more effective and accurate method.