The instant invention provides an add/drop device including a wavelength filter, a quarter waveplate disposed on either side of the wavelength filter, and a polarizing beamsplitter disposed on either side of the quarter waveplates. Each polarizing beamsplitter has an input port and an output port for launching and receiving a beam of light having a known polarization. A polarization switch is optically coupled to each input/output port for selectably rotating the polarization of the input/output beams of light. Advantageously, the polarization switches, which work in cooperation with each other and the polarizing beam splitters, provide means for a non-moving parts add/drop device.