摘要 |
An optical signal processing method and a device which can serve as a signal multiplexer or demultiplexer can be tuned in discrete increments. This device has a movable filter assembly 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 and a first output waveguide. 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 the input and second output waveguides, and can be moved in the trench to alter the optical properties of the two signal paths. |