Design considerations of power splitters based on optical T-waveguide junctions

In this paper, the problem of power splitting around different T-junction structure is investigated using the finite time difference domain method (FDTD). The variation of the width of one arm of T-junction has a significant impact on the transmitted, radiated and reflected power on both sides. The variation of the cavity parameters on one side of the T-junction lead to a dramatic changes of the ratio of power distribution in the waveguides. Furthermore, the variations of the gradient of the reflectors for symmetric and asymmetric T-junction resonators have shown a great effect on the transmission properties.