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US 6,115,173 AGranted
Optical amplifying transmission system and optical amplifier
AssigneeKDD Corporation
InventorsKeiji Tanaka, Noboru Edagawa, Shu Yamamoto
Life of this patent
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AssigneeKDD Corporation
InventorsKeiji Tanaka, Noboru Edagawa, Shu Yamamoto
Estimating the term…
In an optical fiber transmission line between two terminal stations, an input side wavelength converter for up-shifting a wavelength of a signal light is inserted at a front part of each of the optical amplifiers and an output side wavelength converter for down-shifting a wavelength of a signal light is inserted at a rear step of the optical amplifiers. Signal lights transmit in a wavelength band shorter or longer than the zero dispersion wavelength of the transmission optical fiber on said transmission optical fibers. The input side wavelength converter converts the wavelength of the signal lights from the transmission optical fibers within the amplifying bandwidth of the optical amplifiers and the output side wavelength converter returns the wavelength of the signal lights optically amplified by the optical amplifiers.
An optical amplifying transmission system composed of a plurality of optical fiber transmission lines which are repeated and connected by optical amplifying/repeating means wherein said optical amplifying/repeatting means comprises an optical amplifier, an input side wavelength converter for wavelength-converting an inputting signal light within an amplifying bandwidth of said optical amplifier and an output side wavelength converter for wavelength-converting a signal light output from said optical amplifier within a transmission bandwidth on said optical fiber transmission line.
An optical amplifying apparatus comprising an optical amplifier, an input side wavelength converter for wavelength-converting an inputting signal light within an amplifying bandwidth of said optical amplifier and an output side wavelength converter for wavelength-converting a signal light output from said optical amplifier within a transmission bandwidth being different from said amplifying bandwidth.
An optical transmission system comprising:
An optical amplifying transmission system comprising a plurality of optical fiber transmission lines each having a transmission bandwidth, and at least one optical amplifying repeater for repeating and connecting the optical fiber transmission lines, each of said at least one optical amplifying repeater comprising an optical amplifier having an amplifying bandwidth, an input side wavelength converter for wavelength-converting signal light within the transmission bandwidth to signal light within the amplifying bandwidth of said optical amplifier, and an output side wavelength converter for wavelength-converting signal light output from said optical amplifier within the amplifying bandwidth to signal light within the transmission bandwidth.
An optical amplifying apparatus comprising an optical amplifier having an amplifying bandwidth, an input side wavelength converter for wavelength-converting input signal light within a transmission bandwidth into signal light within the amplifying bandwidth of said optical amplifier, and an output side wavelength converter for wavelength-converting signal light output from said optical amplifier within the amplifying bandwidth into signal light within the transmission bandwidth, said transmission bandwidth being different from said amplifying bandwidth.
An optical transmission system comprising:
Dependencies are inferred from the claim text.