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    • 4. 发明授权
    • Wavelength-division-multiplexing passive optical network utilizing fiber fault detectors and/or wavelength tracking components
    • 使用光纤故障检测器和/或波长跟踪部件的波分复用无源光网络
    • US07469102B2
    • 2008-12-23
    • US10530445
    • 2003-04-18
    • Chang-Hee LeeKwang-Uk Chu
    • Chang-Hee LeeKwang-Uk Chu
    • H04J14/02
    • H04J14/0282H04J14/02H04J14/0226H04J14/0227H04J14/0247H04J14/025H04J14/0287
    • Various methods, systems, and apparatuses is described in which a passive-opticalnetwork includes a first multiplexer/demultiplexer, a second multiplexer/demultiplexer, a wavelength tracking component, and a transmission wavelength controller. The first multiplexer/demultiplexer is located in a first location. The second multiplexer/demultiplexer is located in a second location remote from the first location. The wavelength tracking component determines the difference between the transmission band of wavelengths of the first multiplexer/demultiplexer and the second multiplexer/demultiplexer to provide a control signal to match the transmission band of wavelengths of the first multiplexer/demultiplexer and the second multiplexer/demultiplexer. The transmission wavelength controller alters an operating parameter of the first multiplexer/demultiplexer based on the control signal to control the transmission band of wavelengths of the first multiplexer/demultiplexer.
    • 描述了各种方法,系统和装置,其中无源光网络包括第一多路复用器/解复用器,第二多路复用器/解复用器,波长跟踪组件和传输波长控制器。 第一复用器/解复用器位于第一位置。 第二多路复用器/解复用器位于远离第一位置的第二位置。 波长跟踪组件确定第一多路复用器/多路分解器和第二多路复用器/解复用器的波长的传输频带之间的差异,以提供控制信号以匹配第一多路复用器/解复用器和第二多路复用器/解复用器的波长的传输频带。 传输波长控制器基于控制信号改变第一多路复用器/解复用器的操作参数,以控制第一多路复用器/解复用器的波长的传输频带。
    • 6. 发明授权
    • Apparatus and method for measuring optical signal-to-noise ratio
    • 用于测量光信噪比的装置和方法
    • US06671045B1
    • 2003-12-30
    • US09679822
    • 2000-10-05
    • Chang Hee LeeSang Yung ShinKwang Uk Chu
    • Chang Hee LeeSang Yung ShinKwang Uk Chu
    • G01J400
    • H04B10/077G01J4/04H04B10/07955
    • An apparatus and method for measuring optical signal-to-noise ratio in optical communications includes (1) a variable optical band-pass filter (VOBPF) that passes the amplified output beam when the beam wavelength is the same as the passing wavelength of the VOBPF; (2) a 1×4 beam distributor for distributing the passing beam of the VOBPF into four streams; (3) a measuring device for measuring Stokes parameters S0, S1, S2, S3 from the four distributed beams; (4) a calculating device for calculating the optical signal power by finding the power of the polarized component of the amplified output beam from the Stokes parameters S1, S2, and S3; (5) a calculating device for calculating the noise power by finding the power of the noise included in the amplified output beam from Stokes parameter S0 and the optical signal power; and (6) a dividing device for calculating the ratio Power ⁢   ⁢ of ⁢   ⁢ Optical ⁢   ⁢ Signal Power ⁢   ⁢ of ⁢   ⁢ Noise at the passing wavelength.
    • 用于测量光通信中的光信噪比的装置和方法包括:(1)当光束波长与VOBPF的通过波长相同时,通过放大的输出光束的可变光学带通滤波器(VOBPF) ; (2)1x4光束分配器,用于将VOBPF的通过光束分配成四个流; (3)用于从四个分布式波束测量斯托克斯参数S0,S1,S2,S3的测量装置; (4)计算装置,用于通过从斯托克斯参数S1,S2和S3中找出放大的输出光束的偏振分量的功率来计算光信号功率; (5)一种计算装置,用于通过从Stokes参数S0和光信号功率中找出包含在放大的输出光束中的噪声的功率来计算噪声功率; 和(6)用于计算通过波长的比值的分割装置。
    • 10. 发明申请
    • Wavelength-division-multiplexing passive optical network utilizing fiber fault detetors and/or wavelength tracking components
    • 使用光纤故障检测器和/或波长跟踪部件的波分复用无源光网络
    • US20050286895A1
    • 2005-12-29
    • US10530445
    • 2003-04-18
    • Chang-Hee LeeKwang-Uk Chu
    • Chang-Hee LeeKwang-Uk Chu
    • H04J14/02
    • H04J14/0282H04J14/02H04J14/0226H04J14/0227H04J14/0247H04J14/025H04J14/0287
    • Various methods, systems, and apparatuses is described in which a passive-opticalnetwork includes a first multiplexer/demultiplexer, a second multiplexer/demultiplexer, a wavelength tracking component, and a transmission wavelength controller. The first multiplexer/demultiplexer is located in a first location. The second multiplexer/demultiplexer is located in a second location remote from the first location. The wavelength tracking component determines the difference between the transmission band of wavelengths of the first multiplexer/demultiplexer and the second multiplexer/demultiplexer to provide a control signal to match the transmission band of wavelengths of the first multiplexer/demultiplexer and the second multiplexer/demultiplexer. The transmission wavelength controller alters an operating parameter of the first multiplexer/demultiplexer based on the control signal to control the transmission band of wavelengths of the first multiplexer/demultiplexer.
    • 描述了各种方法,系统和装置,其中无源光网络包括第一多路复用器/解复用器,第二多路复用器/解复用器,波长跟踪组件和传输波长控制器。 第一复用器/解复用器位于第一位置。 第二多路复用器/解复用器位于远离第一位置的第二位置。 波长跟踪组件确定第一多路复用器/多路分解器和第二多路复用器/解复用器的波长的传输频带之间的差异,以提供控制信号以匹配第一多路复用器/解复用器和第二多路复用器/解复用器的波长的传输频带。 传输波长控制器基于控制信号改变第一多路复用器/解复用器的操作参数,以控制第一多路复用器/解复用器的波长的传输频带。