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US 5,748,815 AGranted
Optical component adapted to monitor a multiwavelength link and add-drop multiplexer using this component, application to optical networks
AssigneeFrance Telecom
InventorsAndre Hamel, Daniel Laville
Life of this patent
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Abstract
Optical component adapted to monitor a multiwavelength link for use as an add-drop multiplexer in optical networks. The optical component includes an input fiber (68) for transmitting signals of different wavelengths, a diffraction grating (70) for dispersing these signals on several orders of diffraction, fibers (72, 74, 76 and 78) for recovering the dispersed signals corresponding to a given order of diffraction, and fibers (79, 80, 82, and 84) for recovering the same signals but corresponding to another order of diffraction so as to monitor the state of these signals.
Claims7
Optical component comprising:
- an input optical fiber (68) for transmitting optical signals of different wavelengths with respect to one another,
- a diffraction grating (70) for angularly dispersing each of these signals on several orders of diffraction, and
- a first set of optical fibers (72, 74, 76, 78) for respectively recovering the dispersed signals having different wavelengths with respect to one another and corresponding to a given order of diffraction, so as to transmit these signals,
- this component being characterized in that it further includes a second set of optical fibers (79, 80, 82, 84) for respectively recovering the same signals as those recovered by the fibers of the first set but corresponding to another order of diffraction so as to control the state of these recovered signals.
1 more element
Dependencies are inferred from the claim text.