| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wavelength router that selectively directs spectral bands between an input port (12) and an output port (15). <P>SOLUTION: A router includes a free-space optical longitudinal train disposed between an input port and an output port, and a routing setup mechanism (30). The free-space optical vertical train can include air-space elements (20, 25) or can be a monolithic construction. The optical longitudinal train includes a dispersive element (25) such as a diffraction grating, and is configured so that light from the input port encounters the dispersive element twice before reaching the output port. The routing mechanism (30) includes one or more routing elements and cooperates with the other elements (37) in the optical longitudinal train to provide optical paths that couple subsets of the spectral bands to the desired output port. <P>COPYRIGHT: (C)2012,JPO&INPIT |
