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US 12,231,227 B2Granted
Transmission apparatus and transmission system
AssigneeFujitsu Limited
InventorsXiang Zhang, Atsushi Kodama, Tatsuya Tsuzuki, Kyosuke Sone
Life of this patent
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Abstract
A transmission apparatus includes a signal power detector configured to detect signal power of a wavelength-multiplexed optical signal to be transmitted to a transmission line, a variable optical attenuator configured to attenuate the wavelength-multiplexed optical signal, and a processor configured to control an attenuation amount of the variable optical attenuator according to the signal power and whether a Raman amplifier in which pumping light is inputted to the transmission line exists.
Claims14
A transmission apparatus comprising:
- a signal power detector configured to detect signal power of a wavelength-multiplexed optical signal to be transmitted to a transmission line;
- a variable optical attenuator configured to attenuate the wavelength-multiplexed optical signal;
- and
- a processor configured to control an attenuation amount of the variable optical attenuator according to the signal power and whether a Raman amplifier in which pumping light is inputted to the transmission line exists.
1 more element
A transmission system comprising:
- a transmission apparatus configured to include
- a signal power detector configured to detect signal power of a wavelength-multiplexed optical signal to be transmitted to a transmission line,
- a variable optical attenuator configured to attenuate the wavelength-multiplexed optical signal, and
- a processor configured to control an attenuation amount of the variable optical attenuator according to the signal power and whether a Raman amplifier in which pumping light is inputted to the transmission line exists;
- and
- a reception apparatus configured to receive the wavelength-multiplexed optical signal transmitted from the transmission apparatus via the transmission line.
3 more elements
Dependencies are inferred from the claim text.