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US 8,712,238 B2Granted
Optical switching device and communications system
AssigneeFujitsu Limited
InventorTakeshi Sakamoto
Life of this patent
Estimating the term…
Abstract
An optical switching device includes a optical add/drop multiplexer that at least adds an optical signal into and/or drops an optical signal from wavelength division multiplexed light that is wavelength division multiplexed optical signals; a plurality of amplifiers that are disposed on optical paths included in the optical add/drop multiplexer and that can use supplied pump light to amplify the optical signals; an optical source that generates the pump light; and an optical switch that supplies the generated pump light to any one of the amplifiers.
Claims16
An optical switching device comprising:
- a optical add/drop multiplexer that at least adds an optical signal into and/or drops an optical signal from wavelength division multiplexed light that is wavelength division multiplexed optical signals;
- a plurality of amplifiers that are disposed on optical paths included in the optical add/drop multiplexer and that can use supplied pump light to amplify the optical signals;
- an optical source that generates the pump light;
- an optical switch that supplies the generated pump light to any one of the amplifiers;
- and
- a controller that identifies an amplifier whose power of an internal laser diode (LD) is insufficient among the amplifiers and controls the optical source and the optical switch such that the pump light is supplied to the identified amplifier.
3 more elements
A communications system comprising:
- a plurality of connected optical switching devices that respectively include:
- a optical add/drop multiplexer that at least adds an optical signal into and/or drops an optical signal from wavelength division multiplexed light that is wavelength division multiplexed optical signals;
- a plurality of amplifiers that are disposed on optical paths included in the optical add/drop multiplexer and that can use supplied pump light to amplify the optical signals;
- an optical source that generates the pump light;
- an optical switch that supplies the generated pump light to any one of the amplifiers;
- and
- a controller that identifies an amplifier whose power of an internal laser diode (LD) is insufficient among the amplifiers and controls the optical source and the optical switch such that the pump light is supplied to the identified amplifier, wherein
- the communications system transmits the wavelength division multiplexed light.
5 more elements
Dependencies are inferred from the claim text.