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    • 32. 发明授权
    • Bit-rate-independent optical cross-connect device in optical transmission system
    • 光传输系统中的比特率独立光交叉设备
    • US06944405B2
    • 2005-09-13
    • US09953637
    • 2001-09-17
    • Han-Lim LeeByung-Jik KimJun-Ho KohSeong-Taek HwangYun-Je Oh
    • Han-Lim LeeByung-Jik KimJun-Ho KohSeong-Taek HwangYun-Je Oh
    • H04B10/00H04B10/27H04Q3/52H04Q11/00H04Q11/04H04B10/08H04B17/00
    • H04Q11/0005H04Q2011/0016H04Q2011/0024H04Q2011/0039H04Q2011/0045
    • This invention provides an optical transmission with a demultiplexer for demultiplexing an input optical signal into optical signals of different channels and a multiplexer for multiplexing the optical signals outputted from the demultiplexer. The optical cross-connect device includes: N BICDR (Bit Rate Independent Clock and Data Recovery) receivers each for receiving the associated optical signals outputted from the demultiplexer, for converting the associated optical signal into an electrical signal and reproducing clocks and data based on the bit rate of the electrical signal; a switchboard with a cross-connect switch for receiving output signals from the respective N BICDR receiver; N bit rate discriminating units for receiving the output signals from the N BICDR receivers, respectively, thereby outputting bit rate discriminating signals associated with the N BICDR receivers, respectively; a temperature sensing unit for outputting a temperature sensing signal; and, a central processing unit for receiving the bit rate discriminating signals from the N bit rate discriminating unit, along with the temperature sensing signal from the temperature sensing unit, for compensating each of the received bit rate discriminating signals with a temperature-dependent bit rate value read out, based on the temperature sensing signal, from a memory, and for controlling the bit rate of the associated BICDR receiver based on the compensated bit rate.
    • 本发明提供了一种具有解复用器的光传输器,用于将输入光信号解复用为不同信道的光信号,以及复用器,用于复用从解复用器输出的光信号。 光交叉设备包括:N个BICDR(比特率独立时钟和数据恢复)接收机,每个接收器用于接收从解复用器输出的相关联的光信号,用于将相关联的光信号转换成电信号,并基于该信号再现时钟和数据 比特率的电信号; 具有交叉连接开关的交换机,用于接收来自相应N BICDR接收机的输出信号; N比特率鉴别单元,用于分别从N个BICDR接收机接收输出信号,从而分别输出与N个BICDR接收机相关联的比特率鉴别信号; 用于输出温度感测信号的温度检测单元; 以及用于从温度感测单元接收来自N比特率鉴别单元的比特率鉴别信号的中央处理单元,用于以温度依赖比特率对每个接收的比特率鉴别信号进行补偿 基于温度感测信号从存储器读出,并且用于基于补偿的比特率来控制相关联的BICDR接收器的比特率。
    • 36. 发明申请
    • Multi-wavelength light source
    • 多波长光源
    • US20050002670A1
    • 2005-01-06
    • US10771793
    • 2004-02-04
    • Jong-Kwon KimYun-Je OhJun-Ho Koh
    • Jong-Kwon KimYun-Je OhJun-Ho Koh
    • H01S5/50G02B6/293H04J14/02
    • H04J14/02H04B10/506H04J14/0221
    • A multi-wavelength light source unit for optical communication system is disclosed. The light source includes a demultiplexer for demultiplexing a multiplexed light signal into a plurality of lights having different wavelengths and a multiplexer that receives the demultiplexed lights and multiplexes the demultiplexed lights into the multiplexed light signal. Input ports of the multiplexer are respectively port-to-port connectable to each one of a plurality of output ports of the demultiplexer. The light source unit includes a plurality of semiconductor optical amplifiers amplifying the demultiplexed lights output form the demultiplexer, and a plurality of beam splitters for splitting the amplified demultiplexed lights into two parts, so as to provide the respective input ports of the multiplexer with a split part of the lights, while to transmit the other part of the lights out of the beam splitters.
    • 公开了一种用于光通信系统的多波长光源单元。 光源包括用于将复用的光信号解复用为具有不同波长的多个光的解复用器,以及接收解复用的光并将解复用的光复用到复用的光信号中的多路复用器。 多路复用器的输入端口分别是可连接到解复用器的多个输出端口中的每一个的端口到端口。 光源单元包括放大从解复用器输出的解复用光的多个半导体光放大器和用于将放大的解复用光分成两部分的多个分束器,以便将多路复用器的相应输入端口分配 部分灯光,同时将其他部分的光线从光束分离器传出。
    • 37. 发明授权
    • Automatic gain control device of optical fiber amplifier
    • 光纤放大器自动增益控制装置
    • US06580553B2
    • 2003-06-17
    • US10046355
    • 2002-01-14
    • Chan-Youl KimYun-Je OhSeong-Taek HwangJun-Ho Koh
    • Chan-Youl KimYun-Je OhSeong-Taek HwangJun-Ho Koh
    • H01S300
    • H01S3/06754H01S3/10015H01S3/1301
    • An automatic gain control device of an optical fiber amplifier that outputs a compensation signal to control a gain value of the optical fiber amplifier is disclosed. The device includes: a first optical detector for partially converting an input optical signal to the optical fiber amplifier into a first electrical signal; a second optical detector for partially converting an output optical signal from the optical fiber amplifier into a second electrical signal; a first programmable amplifier having a first gain value set based on a first control signal, the first programmable amplifier inputting the first electrical signal and amplifying it at the first gain value to output a first amplified signal; a second programmable amplifier having a second gain value set based on a second control signal, the second programmable amplifier inputting the second electrical signal and amplifying it at the second gain value to output a second amplified signal; a proportional-integral derivative (PID) for outputting the compensation signal, the compensation signal corresponding to the difference between the power level of the first amplified signal and the power level of the second electrical signal; and, a controller for outputting the second control signal to the second programmable amplifier such that it has the second gain value based on a third gain value and for varying the first gain value of the first programmable amplifier until the first electrical signal and second amplified signal become the same in power level, thereby changing the gain value of the optical fiber amplifier to the third gain value.
    • 公开了一种输出补偿信号以控制光纤放大器的增益值的光纤放大器的自动增益控制装置。 该装置包括:第一光学检测器,用于将输入光信号部分地转换成光纤放大器为第一电信号; 第二光学检测器,用于将来自光纤放大器的输出光信号部分地转换成第二电信号; 第一可编程放大器,具有基于第一控制信号设定的第一增益值,第一可编程放大器输入第一电信号并以第一增益值放大第一增益值,以输出第一放大信号; 第二可编程放大器,具有基于第二控制信号设定的第二增益值,第二可编程放大器输入第二电信号并以第二增益值放大第二增益值,以输出第二放大信号; 用于输出所述补偿信号的比例积分微分(PID),所述补偿信号对应于所述第一放大信号的功率电平与所述第二电信号的功率电平之差; 以及控制器,用于将第二控制信号输出到第二可编程放大器,使得其具有基于第三增益值的第二增益值,并且用于改变第一可编程放大器的第一增益值,直到第一电信号和第二放大信号 在功率电平上变得相同,从而将光纤放大器的增益值改变为第三增益值。
    • 39. 发明授权
    • Device for filtering out null packet for MPEG-2 transmission
    • 用于过滤出用于MPEG-2传输的空分组的装置
    • US07428215B2
    • 2008-09-23
    • US10771942
    • 2004-02-04
    • Yong-Deok KimJun-Ho KohChan-Yul KimYun-Je Oh
    • Yong-Deok KimJun-Ho KohChan-Yul KimYun-Je Oh
    • H04J1/16H04J3/14
    • H04N21/23611
    • Disclosed is a device for filtering out a null packet in a data stream for example an MPEG-2 TS (Transport Stream) to avoid bandwidth waste when it is transmitted to a backbone network. The device includes a plurality of receiving interfaces, a filter unit, and a controller. The receiving interfaces receive parallel data, such as DVB-ASI (Digital Video Broadcasting-Asynchronous Serial Interface) inputs as channel-by-channel MPEG-2 data. The filter unit counts the respective numbers of data packets and non-data packets of the data input from the receiving interfaces and filters a null packet in the data. A network transmission unit transmits the filtered data to a backbone network. The controller calculates a bit rate based on both of the count numbers received from the filter unit.
    • 公开了一种用于过滤出例如MPEG-2TS(传输流)的数据流中的零分组的装置,以避免在传输到骨干网络时的带宽浪费。 该装置包括多个接收接口,滤波器单元和控制器。 接收接口接收并行数据,例如作为逐个通道MPEG-2数据的DVB-ASI(数字视频广播 - 异步串行接口)输入。 滤波器单元对从接收接口输入的数据的数据分组和非数据分组的数量进行计数,并对数据中的零分组进行过滤。 网络传输单元将过滤的数据发送到骨干网络。 控制器基于从滤波器单元接收的两个计数值计算比特率。