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US 8,805,194 B2Granted
Optical transmission device and optical switch device
AssigneeFujitsu Limited
InventorTakashi Toyomaki
Life of this patent
Estimating the term…
Abstract
An optical transmission device includes a signal generator configured to generate a first signal corresponding to an amount of residual chromatic dispersion that occurs in a light signal transmitted from the optical transmission device to a downstream device, and a superimposer configured to superimpose the first signal on the light signal transmitted from the optical transmission device and transmit the light signal superimposed by the first signal to the downstream device.
Claims10
An apparatus comprising:
- a signal extractor configured to extract a first signal from a light transmitted to the apparatus from an upstream device, the first signal indicating of an amount of residual chromatic dispersion that occurred in the light due to transmission of the light to the upstream device from a device upstream of the upstream device;
- a signal generator configured to generate a second signal indicating an amount of residual chromatic dispersion that occurred in the light due to transmission of the light to the apparatus from the upstream device;
- and
- a superimposer configured to superimpose a third signal, obtained by using the first signal and the second signal and thereby indicating the amount of residual chromatic dispersion indicated by the first signal and the amount of residual chromatic dispersion indicated by the second signal, on the light, and to transmit the light having the third signal superimposed thereon to a downstream device.
1 more element
An apparatus comprising:
- a signal extractor configured to extract a first signal from a light signal transmitted from an upstream device to the apparatus, the first signal having been superimposed on the light signal by the upstream device and corresponding to residual chromatic dispersion that occurred in the light signal due to transmission of the light signal to the upstream device from a device upstream of the upstream device;
- a signal generator configured to generate a second signal corresponding to residual chromatic dispersion that occurred in the light signal due to transmission of the light signal from the upstream device to the apparatus;
- and
- a superimposer configured to superimpose a third signal, which is obtained by multiplying the first signal by the second signal, on the light signal, wherein the light signal having the third signal superimposed thereon is transmitted by the apparatus to a downstream device.
1 more element
An apparatus, comprising:
- a signal extractor configured to extract a first signal from a light transmitted to the apparatus from an upstream device, the first signal indicating an amount of residual chromatic dispersion that occurred in the light due to transmission of the light to the upstream device from a device upstream of the upstream device;
- a signal generator configured to generate a second signal indicating residual chromatic dispersion in the light that occurred in a transmission span from the upstream device to the apparatus;
- and
- a superimposer configured to superimpose a third signal, obtained by using the first signal and the second signal and thereby indicating the amount of residual chromatic dispersion indicated by the first signal and the amount of residual chromatic dispersion indicated by the second signal, on the light, and to transmit the light having the third signal superimposed thereon to a downstream device,
- wherein the apparatus is a node in a wavelength division multiplexing (WDM) network.
2 more elements
Dependencies are inferred from the claim text.