| 摘要 |
An optical signal processing method and a device which can serve as a signal multiplexer or demultiplexer (2) can be tuned in discrete increments. This device has a movable filter assembly (47, 47', 47'', 47''') having a number of filters, with each filter having a surface which reflects a particular wavelength of light and passes other wavelengths of light. This defines two wavelength-dependent signal paths. Light reflecting from a reflective surface of the filter passes along one signal path which includes an input waveguide (11) and a first output waveguide (13). Light transmitted through the filter travels along another signal path which includes the input waveguide and a second output waveguide. The filter can be contained in a trench separating (17) the input and second output waveguides, and can be moved in the trench (17) to alter the optical properties of the two signal paths.
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