Gain equalizer, optical amplifier, loss compensation method, and optical amplification method
AssigneeNEC Corporation
InventorFUMISATO YOSHIDA
Life of this patent
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Abstract
A gain equalizer for compensation a variation of intensity among a plurality of optical signals each including a different wavelength in a wavelength multiplexed optical signal includes an input part for receiving the wavelength multiplexed optical signal, an outputting part and a gain equalizing unit for repeatedly giving a loss to the wavelength multiplexed optical signal received by the input part, and for outputting the wavelength multiplexed optical signal to the outputting part. Here, the loss is set for each wavelength and is smaller than a loss characteristic required for compensation the variation of intensity.
Claims18
A gain equalizer for compensation a variation of intensity among a plurality of optical signals each including a different wavelength in a wavelength multiplexed optical signal, comprising:
- an input part for receiving said wavelength multiplexed optical signal;
- an outputting part;
- and
- a gain equalizing unit for giving a loss repeatedly to said wavelength multiplexed optical signal received by said input part and outputting said wavelength multiplexed optical signal to said outputting part;
- wherein said loss is set for each wavelength in said wavelength multiplexed optical signal and is smaller than a loss characteristic required for compensation said variation of intensity.
An optical amplifier, comprising:
- a gain equalizer for giving a loss repeatedly to a wavelength multiplexed optical signal;
- and
- an optical amplification unit connected with said gain equalizer;
- wherein said loss is set responding to a wavelength dependency of gain of said optical amplification unit and is smaller than a loss characteristic which is opposite to said wavelength dependency.
A loss compensation method for compensation a variation of intensity among a plurality of optical signals each including a different wavelength in a wavelength multiplexed optical signal, comprising:
- receiving said wavelength multiplexed optical signal;
- giving a loss repeatedly to said received wavelength multiplexed optical signal;
- and
- outputting said wavelength multiplexed optical signal with said loss;
- wherein said loss is set for each wavelength in said wavelength multiplexed optical signal and is smaller than a loss characteristic required for compensation said variation of intensity.
An optical amplification method, comprising:
- receiving a wavelength multiplexed optical signal;
- amplifying intensity of said wavelength multiplexed optical signal;
- giving a loss repeatedly to said wavelength multiplexed optical signal;
- and
- outputting said wavelength multiplexed optical signal which is amplified and given said loss;
- wherein said loss is set responding to a wavelength dependency of gain and is smaller than a loss characteristic which is opposite to said wavelength dependency.
A gain equalizer for compensation a variation of intensity among a plurality of optical signals each including a different wavelength in a wavelength multiplexed optical signal, comprising:
- an input means for receiving said wavelength multiplexed optical signal;
- an outputting means;
- and
- a gain equalizing means for giving a loss repeatedly to said wavelength multiplexed optical signal received by said input means and for outputting said wavelength multiplexed optical signal to said outputting means;
- wherein said loss is set for each wavelength in said wavelength multiplexed optical signal and is smaller than a loss characteristic required for compensation said variation of intensity.
An optical amplifier, comprising:
- a gain equalizing means for giving a loss repeatedly to a wavelength multiplexed optical signal;
- and
- an optical amplification means connected with said gain equalizing means;
- wherein said loss is set responding to a wavelength dependency of gain of said optical amplification means and is smaller than a loss characteristic which is opposite to said wavelength dependency.
Dependencies are inferred from the claim text.