France Telecom

Francedillaois Tillerot

Georges Claveau

Rene Auffret

Mouhammad Jamil Chawki

A device for the frequency transposition of optical signals receiving data elements liable to be at different wavelengths (.lambda.0, .lambda.1 . . . .lambda.n) and capable of delivering, at output, these data elements at one of the reception wavelengths. The device comprises a circulator (30); at least one optical arm comprising a rejection filter (31) followed by a wavelength converter (32); the circulator comprising a port for the reception of the data packets at the different wavelengths (.lambda.0, .lambda.1 . . . .lambda.n), a port for the transmission of data packets without changing their wavelength and at least one other port for each optical arm, so that each of these ports is connected to a rejection filter (31) to receive the data packets at the different wavelengths and reintroduce the data packets reflected by this filter into the circulator; the converter (32) at output of each rejection filter enabling the conversion into a desired wavelength of the data packets not reflected by the filter. The invention can be applied to asynchronous packet or synchronous frame transmission packets.

Device for the frequency transposition of optical signals

An optical crossconnect includes optical elements (D1 . . . DM) for wavelength demultiplexing of optical signals and elements (MT) for optically processing the demultiplexed signals which give each optical signal a specific wavelength and bring to one of the outputs (S1 . . . SM) the signal with the specific wavelength under the control of a management unit (G). Such an optical crossconnect may find particular application in telecommunication networks.

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Spern ar bleiz, France

Francedillaois Tillerot