Variable delay device for optical signals.

Variable delay device for optical signals.

A variable delay device for optical signals is proposed. In order to reduce the switching time, this device comprises a connector and a multiplexer containing n inputs tuned to n different wavelengths, respectively. The inputs of this multiplexer are connected to the outputs of the connector through various wavelength conversion devices and various LZs. Each conversion device issues respectively. multiplexer input wave, the length of which corresponds to this input. The invention also relates to a device for synchronizing the channels of a multiplexer along a wavelength using said variable delay device.
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A needle for separating and pulling communication cables.

A needle is proposed for separating and pulling communication cables in which m. optical fibers were also used. This needle is hollow. Liquid grease may circulate inside the needle. The back end of the needle m. B. connected to the lubricant reservoir, and the front one is equipped with either a closed removable tip during separation operations, when this needle is translationally moving in the cable channel, or lubricating - during the cable pulling operation. This needle is a tube of composite material enclosed in an outer sheath and containing an inner tube of a sealing coating. This design is realized by extruding and stretching a composite material based on fiberglass in an epoxy matrix on a tube of thermoplastic material, which in this case becomes a tube of the inner coating for sealing. The system obtained in this way is coated externally with a small coefficient. friction. The hollow needle functions as a nozzle and lubrication tip and provides for the dispersion of lubricant immediately before the drawn end of the cable