Equalizer, repeater and communication system
AssigneeNEC Corporation
InventorKoji INADA
Life of this patent
Estimating the term…
Abstract
In order to enable easy adjustment of loss wavelength characteristics in accordance with the characteristics of a wavelength division multiplex optical signal, and the usage environment of an EDFA, etc., an equalizer 10 is provided with: a wavelength selection switch unit 20 that adds a loss profile that has been set to an inputted wavelength division multiplex optical signal, and outputs the same; and a setting unit 30 that sets the loss profile to a wavelength selection switch means on the basis of obtained setting information. The setting information is information for flattening the spectrum of the outputted wavelength division multiplex optical signal.
Claims19
An equalizer, comprising:
- a wavelength selection switch configured to output an inputted wavelength division multiplexed optical signal after adding a loss profile having been set;
- a setting circuit configured to acquire setting information that is information for flattening a spectrum of a wavelength division multiplexed optical signal outputted from the wavelength selection switch, and set a loss profile to the wavelength selection switch based on the setting information.
(canceled)
A communication system, comprising:
- an amplifier configured to amplify light intensity of a wavelength division multiplexed optical signal inputted and output the wavelength division multiplexed optical signal amplified;
- an equalizer including a wavelength selection switch configured to add to the wavelength division multiplexed optical signal inputted a loss profile having been set and output the wavelength division multiplexed optical signal being added the loss profile and a setting circuit configured to update the loss profile having been set to the wavelength selection switch based on the acquired setting information,
- wherein
- the amplifier and the equalizer are arranged in a cascade manner, and the setting information is information for flattening a spectrum of a wavelength division multiplexed optical signal having passed the amplifier and the wavelength selection switch.
An equalization method, comprising:
- adding, to a wavelength division multiplexed optical signal inputted to a wavelength selection switch, a loss profile that has been set;
- acquiring setting information that is information for flattening a spectrum of a wavelength division multiplexed optical signal outputted from the wavelength selection switch;
- and
- setting a loss profile to the wavelength selection switch based on the setting information.
Dependencies are inferred from the claim text.