The Waveguide Y Branch (Y) element can be used to combine or split optical signals. The “configuration” property determines if the Y element splits signals (“splitter”), combines signals (“combiner”), or acts as a combined splitter/coupler (“bidirectional”). Due to strong reflection only 20% of the input power is transmitted at the output ports. After that. In the second step of this work we propose an optimization of the conventional splitter design leading to suppression of the asymmetric splitting ratio to one-third of its initial value and to the improvement of the losses by nearly 2 dB. In addition to active components, passive waveguides.