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    • 5. 发明申请
    • Optical transmission system
    • 光传输系统
    • US20060188262A1
    • 2006-08-24
    • US11141470
    • 2005-06-01
    • Mamoru SuematsuAkira YamamotoHaruki TanakaHideaki SugiyaYuki MurakamiHisayuki Ojima
    • Mamoru SuematsuAkira YamamotoHaruki TanakaHideaki SugiyaYuki MurakamiHisayuki Ojima
    • H04B10/12
    • H04B10/25133H04B10/077
    • An optical transmission system is provided which is capable of booting the system by using an ASE (Amplified Spontaneous Emission) light in a manner to provide high quality. A pre-amplifier receives noise light and does gain setting in an amplifier booting mode and receives an optical signal and to amplify the received signal in a working mode. A variable dispersion compensator is placed in a preceding-stage of the pre-amplifier and makes compensation of dispersion of a wavelength occurring when an optical signal propagates through an optical fiber in a variable manner. A switching unit to select, when the noise light passes through the variable dispersion compensator, if a level of the noise light is deviated from a desired level, a bypass route so as to make the noise light not be input to the variable dispersion compensator but be input to the pre-amplifier in an amplifier booting mode according to a switching instruction and to select a passage route so as to make the optical signal, after having been input to the variable dispersion compensator and having undergone dispersion compensation, be input to the pre-amplifier according to the switching instruction in a working mode.
    • 提供了一种光传输系统,其能够以提供高质量的方式使用ASE(放大自发发射)光来引导系统。 前置放大器接收噪声光,并以放大器启动模式进行增益设置,并接收光信号并以工作模式放大接收信号。 可变色散补偿器放置在前置放大器的前级中,并且补偿当光信号以可变方式传播通过光纤时出现的波长的色散。 一种开关单元,当噪声光通过可变色散补偿器时,如果噪声光的电平偏离期望的电平,则选择旁路路径,以使得噪声光不被输入到可变色散补偿器,但是 根据切换指令以放大器引导模式输入到前置放大器,并选择通路,以便在输入到可变色散补偿器并经过色散补偿之后使光信号输入到 前置放大器根据切换指令在工作模式下。
    • 6. 发明授权
    • Optical-level control method, optical-level control apparatus and wavelength-multiplexing optical network
    • 光电平控制方法,光电位控制装置和波长复用光网络
    • US07466478B2
    • 2008-12-16
    • US11079426
    • 2005-03-15
    • Takuji MaedaHaruki TanakaHisayuki OjimaHiroaki TomofujiHideaki SugiyaKoji Batou
    • Takuji MaedaHaruki TanakaHisayuki OjimaHiroaki TomofujiHideaki SugiyaKoji Batou
    • H04B10/17
    • H04J14/0297H04B10/296H04J14/0221H04J14/0227H04J14/0241H04J14/0283H04J14/0291H04J14/0295
    • An optical-level control apparatus includes a plurality of variable optical attenuators each used for attenuating an input optical signal included in a wavelength division multiplexing signal as a component having a specific wavelength by applying a variable attenuation quantity, a plurality of control units each used for executing automatic control for automatically controlling the attenuation quantity in order to adjust the optical level of an optical signal output by a corresponding one of the variable optical attenuators to a target level in an ordinary normal state of the input optical signal, and a detection unit for detecting a loss of light failure of an optical signal input to each of the variable optical attenuators and detecting disappearance of the loss of light failure. When the detection unit detects the loss of light failure, a corresponding one of the control units executes first attenuation quantity locking control to adjust the attenuation quantity to a first predetermined value and as the detection unit detects the disappearance of the loss of light, the corresponding control unit executes second attenuation quantity locking control to adjust the attenuation quantity to a second predetermined value.
    • 光学级控制装置包括多个可变光衰减器,每个可变光衰减器用于通过施加可变衰减量来衰减包括在波分复用信号中的输入光信号作为具有特定波长的分量;多个控制单元,每个用于 执行用于自动控制衰减量的自动控制,以便在输入光信号的普通正常状态下将由相应的一个可变光衰减器输出的光信号的光学电平调整到目标电平;以及检测单元, 检测输入到每个可变光衰减器的光信号的光衰的损失,并检测光故障损失的消失。 当检测单元检测到光损失时,对应的一个控制单元执行第一衰减量锁定控制,以将衰减量调整到第一预定值,并且随着检测单元检测到光损失的消失,相应的 控制单元执行第二衰减量锁定控制以将衰减量调整到第二预定值。
    • 7. 发明申请
    • Optical-level control method, optical-level control apparatus and wavelength-multiplexing optical network
    • 光电平控制方法,光电位控制装置和波长复用光网络
    • US20050168806A1
    • 2005-08-04
    • US11079426
    • 2005-03-15
    • Takuji MaedaHaruki TanakaHisayuki OjimaHiroaki TomofujiHideaki SugiyaKoji Batou
    • Takuji MaedaHaruki TanakaHisayuki OjimaHiroaki TomofujiHideaki SugiyaKoji Batou
    • H01S3/00H04B10/17H04J14/02
    • H04J14/0297H04B10/296H04J14/0221H04J14/0227H04J14/0241H04J14/0283H04J14/0291H04J14/0295
    • An optical-level control apparatus includes a plurality of variable optical attenuators each used for attenuating an input optical signal included in a wavelength division multiplexing signal as a component having a specific wavelength by applying a variable attenuation quantity, a plurality of control units each used for executing automatic control for automatically controlling the attenuation quantity in order to adjust the optical level of an optical signal output by a corresponding one of the variable optical attenuators to a target level in an ordinary normal state of the input optical signal, and a detection unit for detecting a loss of light failure of an optical signal input to each of the variable optical attenuators and detecting disappearance of the loss of light failure. When the detection unit detects the loss of light failure, a corresponding one of the control units executes first attenuation quantity locking control to adjust the attenuation quantity to a first predetermined value and as the detection unit detects the disappearance of the loss of light, the corresponding control unit executes second attenuation quantity locking control to adjust the attenuation quantity to a second predetermined value.
    • 光学级控制装置包括多个可变光衰减器,每个可变光衰减器用于通过施加可变衰减量来衰减包括在波分复用信号中的输入光信号作为具有特定波长的分量;多个控制单元,每个用于 执行用于自动控制衰减量的自动控制,以便在输入光信号的普通正常状态下将由相应的一个可变光衰减器输出的光信号的光学电平调整到目标电平;以及检测单元, 检测输入到每个可变光衰减器的光信号的光衰的损失,并检测光故障损失的消失。 当检测单元检测到光损失时,相应的一个控制单元执行第一衰减量锁定控制,以将衰减量调节到第一预定值,并且当检测单元检测到光损失消失时,对应的 控制单元执行第二衰减量锁定控制以将衰减量调整到第二预定值。
    • 8. 发明授权
    • Optical transmission system
    • 光传输系统
    • US07430372B2
    • 2008-09-30
    • US11141470
    • 2005-06-01
    • Mamoru SuematsuAkira YamamotoHaruki TanakaHideaki SugiyaYuki MurakamiHisayuki Ojima
    • Mamoru SuematsuAkira YamamotoHaruki TanakaHideaki SugiyaYuki MurakamiHisayuki Ojima
    • H04B10/08H04B17/00
    • H04B10/25133H04B10/077
    • An optical transmission system is provided which is capable of booting the system by using an ASE (Amplified Spontaneous Emission) light in a manner to provide high quality. A pre-amplifier receives noise light and does gain setting in an amplifier booting mode and receives an optical signal and to amplify the received signal in a working mode. A variable dispersion compensator is placed in a preceding-stage of the pre-amplifier and makes compensation of dispersion of a wavelength occurring when an optical signal propagates through an optical fiber in a variable manner. A switching unit to select, when the noise light passes through the variable dispersion compensator, if a level of the noise light is deviated from a desired level, a bypass route so as to make the noise light not be input to the variable dispersion compensator but be input to the pre-amplifier in an amplifier booting mode according to a switching instruction and to select a passage route so as to make the optical signal, after having been input to the variable dispersion compensator and having undergone dispersion compensation, be input to the pre-amplifier according to the switching instruction in a working mode.
    • 提供了一种光传输系统,其能够以提供高质量的方式使用ASE(放大自发发射)光来引导系统。 前置放大器接收噪声光,并以放大器启动模式进行增益设置,并接收光信号并以工作模式放大接收信号。 可变色散补偿器放置在前置放大器的前级中,并且补偿当光信号以可变方式传播通过光纤时出现的波长的色散。 一种开关单元,当噪声光通过可变色散补偿器时,如果噪声光的电平偏离期望的电平,则选择旁路路径,以使得噪声光不被输入到可变色散补偿器,但是 根据切换指令以放大器引导模式输入到前置放大器,并选择通路,以便在输入到可变色散补偿器并经过色散补偿之后使光信号输入到 前置放大器根据切换指令在工作模式下。