A Transfer-Matrix Method for Analyzing Non-uniform Co-directional Fiber Grating Couplers and Comparison between Measured and Calculated Transmission Spectra

摘要

A simple and efficient transfer-matrix method based on a discrete coupling model is presented to analyze uniform and non-uniform fiber grating couplers between co-propagating core and cladding modes. Uniform and piecewise-uniform long-period gratings were fabricated by a point-by-point arc discharge technique. Their measured transmission spectra were compared with the transmission spectra calculated by the presented method.