WAVELENGTH DIVISION MULTIPLEXING DEVICES WITH STAGGERED FILTERS AND METHODS OF MAKING THE SAME

A wavelength division multiplexing (WDM) device comprises: a substrate; a common port coupled to the substrate and configured for communication of a combined optical signal that includes different signal channels; and filters coupled to the substrate. The common port and the filters define an optical path for the combined optical signal. Each filter is configured to pass one of the signal channels and to reflect any remainder of the signal channels. The filters have a staggered arrangement to facilitate automated assembly. Methods of such automated assembly are also disclosed.