An optical wavelength multiplexing device for use in an optical networking environment
is presented. The device features optically dispersive elements combined with an
array of reflectors that permit both realization of flat-top filter characteristics
together with noise reduction, and in some embodiments wavelength routing, blocking
or add-drop functionality. Additionally, the design of the device is easily modified
to dissipate light having a wavelength that does not correspond to any predetermined
wavelength channel.