A reconfigurable optical interleaver/deinterleaver device combines/separates a
pair of optical input signals from and/or to an optical WDM input signal. The interleaver
device includes a spatial light modulator having a micro-mirror device with a two-dimensional
array of micro-mirrors that flip between first and second positions in a "digital"
fashion in response to a control signal provided by a controller in accordance
with a switching algorithm and an input command. A pair of collimators, diffraction
gratings and Fourier lens collectively collimate, separate and focus the optical
input channels and optical add channels onto the array of micro-mirrors. Each optical
channel is focused on a plurality of micro-mirrors of the micro-mirror device,
which effectively pixelates the optical channels.
