Abstract: In this paper,a new type of optical waveguide having the functions of the wavelength division multiplexer and optical switch is presented. The characteristics of this device are analyzed and calculated numerically by employing the beam propagation method (BPM).The results of preliminary experiments indicate that this device has the good performance of the wavelength division multiplexer and the optical switch.

Key words: optical waveguide, wavelength division multiplexer, beam propagation method