  We propose the mesoscopic device based on the Rashba spin orbit interaction
(SOI) that contains a gated ballistic Aharonov-Bohm (AB) ring with incoming
lead and two asymmetrically situated outgoing leads. The variations of the
Rashba coupling parameter induced by the gate voltage applied to the AB ring is
shown to cause the redistribution of the carrier flux between the outgoing
leads and spin polarization of the outgoing currents, thus allowing the system
to manifest the properties of the quantum splitter and spin filter.
