| 摘要 |
A tunable optical wavelength demultiplexer (10) has a plurality of demultiplexer units (113, 114, 115, 116) formed on a planar waveguide (111). Every demultiplexer unit comprises a plurality of input waveguide channels, a plurality of output waveguide channels, and a Bragg grating, said each input waveguide channel coupling with the Bragg grating at a different angle, and each output waveguide channel being a mirror image of a corresponding input waveguide channel. Bragg gratings of demultiplexer units are parallel each other. Corresponding input waveguide channels are parallel to each other. An adjustable mechanism (100) adjusts an input port (25) and output ports (271, 272, 273, 274) to couple with a desired input waveguide channel and corresponding output waveguide channels.
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