Luckoff Display Corporation, of Columbus, Ohio, announces that it has developed a new technology which enables a modulated input signal, such as that which would be used in a telecommunications system, to be switched to any combination of "n" output fiber optics by means of a rotating diffraction grating which causes the laser diode spectrally broad band to be spectrally dispersed over an array of collecting fibers which route the signal combinations to output fibers. This technique enables any combination of "n" fibers to be added or dropped from the communications network. ( reference attached figures 1,2 and 3)

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Figure 1	Figure 2	Figure 3

A multi-spectral information modulated source normally incident on patented rotatable diffractive optics diffracts each wavelength of the source at a different angle as a function of the optical grating spacing and the angle of rotation of the optics. By changing the angle of rotation, the source information can be switched to either different detectors or different light conduits such as optical fibers. Conversely, an information modulated source can be placed at a position off normal of a rotatable grating such that the diffracted energy from the grating will be normal to the grating where a detector or light conduit can be located. This arrangement enables the construction of a device for adding or dropping multiple channels in a DWDM (dense wavelength division multiplexing) fiber optic communication system or for de-multiplexing and switching multiple optical fiber channels.