Low cost, hybrid integrated dense wavelength division multiplexer/demultiplexer for fiber optical networks

摘要

A first embodiment of the present invention provides a dense wavelength division multiplexer which has a planar array of input optical channels, each channel capable of receiving an optical signal. Coupled to this planar array of input channels is a first waveguide concentrator which facilitates the reduction of the spacing between the cores of the input optical channels. A first collimating provides means for transforming the optical signals into a collimated beam. A wavelength dependent element is disposed proximate the first collimating means. A second collimating means refocuses the collimated beam into an optical channel in a second waveguide concentrator, which facilitates the expansion of the spacing between the cores of the output channels, and ultimately to an array of output optical channels.