| 摘要 |
An optical wavelength muter utilizes a dispersive medium (e.g., a diffracti on grating) and reflective surfaces. The dispersive medium separates an input optical signal (light beam) into a plurality of components, for example by wavelengths. The reflective surfaces convert the components into separate output beams traveling in the desired directions. The number and the direction of the output beams can be controll ed by manipulating the angle of incidence at which the components strike the reflective surfaces. A micro-mirror array modulator serves as the reflective surfaces. Each mirror in the micro-mirror array modulator is positioned to direct individual components into a number of output signals. Alternatively, a polarization steering device which includes a polarizati on modulator and at least one birefringent element in addition to reflective surfaces is utilized. A Wollaston prism with a reflective surface may also be used.</SDO AB>
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