Analysis of the influence of the tilt angle of Bragg gratings written in 2 x 2 symmetric fused fiber couplers

摘要

In this paper, we present a theoretical study on the effect of the angle of a tilted Bragg grating written in a 2x2 symmetric fused fiber coupler. Coupling coefficients and wavelength response curves show that, the grating angle is critical in determining the behavior of the component. For a particular type of coupler, a tilt of 0.4° is sufficient to degrade component performance.