公开(公告)号：US20100150560A1

公开(公告)日：2010-06-17

申请号：US12625286

申请日：2009-11-24

申请人： Jie-hyun Lee ,  Seung-hyun Cho ,  Han-hyub Lee ,  Byoung-whi Kim ,  Jea-hoon Yu ,  Sang-soo Lee ,  Jai-sang Koh

发明人： Jie-hyun Lee ,  Seung-hyun Cho ,  Han-hyub Lee ,  Byoung-whi Kim ,  Jea-hoon Yu ,  Sang-soo Lee ,  Jai-sang Koh

IPC分类号： H04J14/02

CPC分类号： H04B10/2537 ,  H04J2014/0253

摘要： Disclosed are an optical transmission apparatus and method in a wavelength division multiplexing passive optical network (WDM-PON). The optical transmission apparatus outputs an optical signal by applying a DC bias current and an RF signal to a laser diode at a threshold current level of the laser diode, thereby broadening an optical spectrum of the laser diode. Accordingly, an optical link becomes less vulnerable to reflection induced noise, which contributes to improve stability and reliability of the optical link.

摘要翻译： 公开了波分复用无源光网络（WDM-PON）中的光传输装置和方法。 光传输装置通过在激光二极管的阈值电流电平下向激光二极管施加DC偏置电流和RF信号来输出光信号，从而使激光二极管的光谱变宽。 因此，光链路变得不易受到反射感应噪声的影响，这有助于提高光链路的稳定性和可靠性。

公开(公告)号：US20100158522A1

公开(公告)日：2010-06-24

申请号：US12607955

申请日：2009-10-28

申请人： Seung-hyun Cho ,  Han-hyub Lee ,  Byoung-whi Kim ,  Sang-soo Lee ,  Jea-hoon Yu ,  Jai-sang Koh

发明人： Seung-hyun Cho ,  Han-hyub Lee ,  Byoung-whi Kim ,  Sang-soo Lee ,  Jea-hoon Yu ,  Jai-sang Koh

IPC分类号： H04J14/02 ,  H04J14/06 ,  H04B10/00

CPC分类号： H04J14/0282 ,  H04B10/506 ,  H04J14/02 ,  H04J14/06

摘要： A seed light module based on a single longitudinal mode oscillation light source is provided. The seed light module includes a multi-wavelength signal generation light source unit generating a continuous wave (CW) of different wavelengths, a multiplexer wavelength-division multiplexing the light output from the light source unit, a polarization beam splitter splitting the light of multiple wavelength components output from the multiplexer according to specific polarization components, phase modulators phase-modulating signals of a first polarization component and a second polarization component split by the polarization beam splitter onto a sine wave having a frequency and amplitude, a radio frequency (RF) signal generator generating the sine wave, a RF signal distributor distributing the generated RF signal, amplifiers amplifying the distributed RF signals, and a polarization beam combiner combining the lights phase-modulated by the respective phase modulators and providing the combined light as a seed light output.

摘要翻译： 提供了基于单个纵模式振荡光源的种子光模块。 种子光模块包括产生不同波长的连续波（CW）的多波长信号产生光源单元，从光源单元输出的光的复用波分复用，将多个波长的光分离的偏振分束器 根据特定偏振分量输出的分量，将由偏振分束器分离的第一偏振分量和第二偏振分量的相位调制信号的相位调制信号转换成具有频率和幅度的正弦波，射频（RF）信号 产生正弦波的发生器，分配所产生的RF信号的RF信号分配器，放大分布式RF信号的放大器以及组合由各个相位调制器相位调制的光并将组合光提供为种子光输出的偏振光束组合器。

公开(公告)号：US08649691B2

公开(公告)日：2014-02-11

申请号：US12687246

申请日：2010-01-14

申请人： Eui-suk Jung ,  Dong-min Seol ,  Byoung-whi Kim ,  Sang-soo Lee ,  Seung-hyun Cho

发明人： Eui-suk Jung ,  Dong-min Seol ,  Byoung-whi Kim ,  Sang-soo Lee ,  Seung-hyun Cho

IPC分类号： H04B10/06

CPC分类号： H04B10/695 ,  H04J14/0282 ,  H04L25/062 ,  H04L27/06

摘要： Disclosed are an apparatus and method for detecting optical signals. The optical signal detection apparatus includes: a signal receiver to convert a received optical signal into an electrical signal; a threshold decision unit to establish a mathematical model based on the electrical signal and to decide an optimized threshold value based on the mathematical model; and a signal detector to detect the electrical signal based on the optimized threshold value. Hence, since threshold values optimized adaptively according to received signals are used, a bit error rate may be lowered and accordingly detection performance may be improved.

摘要翻译： 公开了一种用于检测光信号的装置和方法。 光信号检测装置包括：信号接收器，用于将接收到的光信号转换为电信号; 阈值决定单元，用于基于所述电信号建立数学模型，并且基于所述数学模型来确定优化的阈值; 以及信号检测器，用于基于优化的阈值检测电信号。 因此，由于使用根据接收到的信号自适应地优化阈值，所以可能降低误码率，从而可以提高检测性能。

公开(公告)号：US08406625B2

公开(公告)日：2013-03-26

申请号：US12486642

申请日：2009-06-17

申请人： Hwan-seok Chung ,  Sun-hyok Chang ,  Sang-soo Lee ,  Kwang-joon Kim

发明人： Hwan-seok Chung ,  Sun-hyok Chang ,  Sang-soo Lee ,  Kwang-joon Kim

IPC分类号： H04J14/00

CPC分类号： H04Q11/0062 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0217 ,  H04J14/0291 ,  H04J14/0295 ,  H04J14/0297 ,  H04Q2011/0011 ,  H04Q2011/0015 ,  H04Q2011/0081

摘要： Provided is an optical network in which a wavelength division multiplexing-based optical transmission scheme is implemented. An apparatus for cross-connecting an optical path includes a path switch including a plurality of input terminals receiving optical signals from other nodes, and a plurality of output terminals sending the optical signals to the other nodes, the path switch switching the path of the optical signal so that the optical signal input via one of the input terminals is output to one of the output terminals; and a wavelength converter converting a wavelength of the optical signal input via the input terminal and outputting the wavelength-converted optical signal to the output terminal according to a switching result of the path switch. Thus, inefficient use of a network resource due to wavelength collision can be prevented, the path can be automatically cross-connected and thus quickly established, path switching and branch combination can be performed irrespective of wavelength, and switching can be performed irrespective of direction.

摘要翻译： 提供了实现基于波分复用的光传输方案的光网络。 用于交叉连接光路的装置包括：路径开关，其包括从其他节点接收光信号的多个输入端子，以及将光信号发送到其他节点的多个输出端子，路径开关切换光学路径 信号，使得经由一个输入端子输入的光信号被输出到输出端之一; 以及波长转换器，其经由所述输入端子转换输入的所述光信号的波长，并且根据所述路径切换的切换结果将所述波长转换的光信号输出到所述输出端子。 因此，可以防止由于波长碰撞导致的网络资源的低效使用，路径可以自动交叉连接并因此快速建立，路径切换和分支组合可以与波长无关地执行，并且可以不考虑方向进行切换。

公开(公告)号：US20100092172A1

公开(公告)日：2010-04-15

申请号：US12486642

申请日：2009-06-17

申请人： Hwan-seok Chung ,  Sun-hyok Chang ,  Sang-soo Lee ,  Kwang-joon Kim

发明人： Hwan-seok Chung ,  Sun-hyok Chang ,  Sang-soo Lee ,  Kwang-joon Kim

IPC分类号： H04J14/00

CPC分类号： H04Q11/0062 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0217 ,  H04J14/0291 ,  H04J14/0295 ,  H04J14/0297 ,  H04Q2011/0011 ,  H04Q2011/0015 ,  H04Q2011/0081

摘要： Provided is an optical network in which a wavelength division multiplexing-based optical transmission scheme is implemented. An apparatus for cross-connecting an optical path includes a path switch including a plurality of input terminals receiving optical signals from other nodes, and a plurality of output terminals sending the optical signals to the other nodes, the path switch switching the path of the optical signal so that the optical signal input via one of the input terminals is output to one of the output terminals; and a wavelength converter converting a wavelength of the optical signal input via the input terminal and outputting the wavelength-converted optical signal to the output terminal according to a switching result of the path switch. Thus, inefficient use of a network resource due to wavelength collision can be prevented, the path can be automatically cross-connected and thus quickly established, path switching and branch combination can be performed irrespective of wavelength, and switching can be performed irrespective of direction.

摘要翻译： 提供了实现基于波分复用的光传输方案的光网络。 用于交叉连接光路的装置包括：路径开关，其包括从其他节点接收光信号的多个输入端子，以及将光信号发送到其他节点的多个输出端子，路径开关切换光学路径 信号，使得经由一个输入端子输入的光信号被输出到输出端之一; 以及波长转换器，其经由所述输入端子转换输入的所述光信号的波长，并且根据所述路径切换的切换结果将所述波长转换的光信号输出到所述输出端子。 因此，可以防止由于波长碰撞导致的网络资源的低效使用，路径可以自动交叉连接并因此快速建立，路径切换和分支组合可以与波长无关地执行，并且可以不考虑方向进行切换。

公开(公告)号：US06678431B2

公开(公告)日：2004-01-13

申请号：US10278228

申请日：2002-10-23

申请人： Ki-ho Han ,  Sang-soo Lee

发明人： Ki-ho Han ,  Sang-soo Lee

IPC分类号： G02B600

CPC分类号： G02B6/4246 ,  G02B6/2713 ,  G02B6/278 ,  H04B10/2569

摘要： Method for compensating polarization mode dispersion, The method includes: transforming states and directions of polarization components of an optical signal received from the optical transmission line, rotating the polarization components of the optical signal output from the polarization controller, separating two orthogonal polarization components of the output from the polarization rotator so that a first polarization component is transmitted to an output path and a second polarization component is transmitted to a monitoring path, controlling the PC using a feedback control to minimize an electrical power filtered at a specified frequency so that the two orthogonal polarization components of the optical input signal to the polarization beam splitter are aligned to two axes of the PBS, and controlling the polarization rotator by comparing an optical power of the first polarization component transmitted to the output path with an optical power of the second polarization component transmitted to the monitoring path.

摘要翻译： 用于补偿偏振模色散的方法，该方法包括：从光传输线接收的光信号的偏振分量的状态和方向变换，旋转从偏振控制器输出的光信号的偏振分量，分离出两个正交偏振分量 从偏振旋转器输出，使得第一偏振分量被传输到输出路径，并且第二偏振分量被发送到监视路径，使用反馈控制来控制PC以最小化以指定频率滤波的电功率， 对偏振分束器的光输入信号的正交偏振分量对准PBS的两个轴，并且通过将透射到输出路径的第一偏振分量的光功率与第二偏振光的光功率进行比较来控制偏振旋转器 组件tr 安排到监控路径。

公开(公告)号：US08036527B2

公开(公告)日：2011-10-11

申请号：US12053400

申请日：2008-03-21

申请人： Sun-hyok Chang ,  Hwan-seok Chung ,  Sang-soo Lee ,  Kwang-joon Kim

发明人： Sun-hyok Chang ,  Hwan-seok Chung ,  Sang-soo Lee ,  Kwang-joon Kim

IPC分类号： G02F1/00 ,  G02F2/00 ,  H01S3/00 ,  H04B10/00 ,  H04J14/00

CPC分类号： H04J14/029 ,  H04J14/0284

摘要： An apparatus and method for protection switching of an optical channel at each node in an optical network based on wavelength division multiplexing optical transmission technology are provided. The method can be applied to any node having at least two optical fiber inputs and outputs. The apparatus includes: a splitter receiving an electrical signal and splitting the received electrical signal into a plurality of electrical signals which are substantially identical to the received electrical signal; an output switching unit selecting output paths of the electrical signals split by the splitter according to an optical channel path control command of the optical network; and a plurality of optical transponders being assigned to the respective output paths of the electrical signals, converting the electrical signal input by the selection of the output switching unit to an optical signal, and transmitting the converted optical signal to another node of the optical network.

摘要翻译： 提供了一种基于波分复用光传输技术在光网络中的每个节点处保护光信道切换的装置和方法。 该方法可以应用于具有至少两个光纤输入和输出的任何节点。 该装置包括：分离器，其接收电信号并将接收到的电信号分解为与所接收的电信号基本相同的多个电信号; 输出切换单元，根据光网络的光信道路径控制指令，选择由分路器分割的电信号的输出路径; 以及多个光转发器被分配给电信号的相应输出路径，通过输出切换单元的选择将输入的电信号转换为光信号，并将转换的光信号传输到光网络的另一个节点。

公开(公告)号：US20050041154A1

公开(公告)日：2005-02-24

申请号：US10891481

申请日：2004-07-15

申请人： Sang-soo Lee ,  Ho-nam Lee

发明人： Sang-soo Lee ,  Ho-nam Lee

IPC分类号： H04N5/21 ,  H04N5/213

CPC分类号： H04N5/21

摘要： An apparatus for and a method of adaptively processing video signals based on noise states. The method includes, a memory device that stores a look-up table in which optimal filter tap coefficients corresponding to a number of noise levels are registered; a noise measurement unit that obtains a noise measurement from input video signals during a predetermined period; a filter coefficient determination unit that selects optimal filter tap coefficients from the memory based on the noise measurement obtained by the noise measurement unit; a noise suppression filter that employs the optimal filter tap coefficients selected by the filter coefficient determination unit to filter and remove noise from the input video signals; and a video signal processor that performs video signal processing on the result output by the noise suppression filter.

摘要翻译： 一种基于噪声状态自适应地处理视频信号的装置和方法。 该方法包括：存储装置，存储查找表，其中登记与多个噪声电平对应的最佳滤波器抽头系数; 噪声测量单元，其在预定时段期间从输入视频信号获得噪声测量; 滤波器系数确定单元，基于由噪声测量单元获得的噪声测量值从存储器中选择最佳滤波器抽头系数; 噪声抑制滤波器，其使用由滤波器系数确定单元选择的最佳滤波器抽头系数来滤波和去除输入视频信号中的噪声; 以及对由噪声抑制滤波器输出的结果执行视频信号处理的视频信号处理器。

公开(公告)号：US08224190B2

公开(公告)日：2012-07-17

申请号：US12618579

申请日：2009-11-13

申请人： Hwan-seok Chung ,  Sun-hyok Chang ,  Sang-soo Lee ,  Kwang-joon Kim

发明人： Hwan-seok Chung ,  Sun-hyok Chang ,  Sang-soo Lee ,  Kwang-joon Kim

IPC分类号： H04B10/04

CPC分类号： H04B10/2557 ,  H04J14/0224 ,  H04J14/0257 ,  H04J14/026 ,  H04J14/0279

摘要： Provided is a channel assignment method in a wavelength-division-multiplexed transmission system. The channel assignment method includes obtaining information about signal modulation schemes from a plurality of optical transmitters, and assigning channels to the respective optical transmitters in consideration of the obtained information about the signal modulation schemes. Accordingly, in transmission of channels of different modulation formats, cross phase modulation is minimized, thereby reducing inter-channel interference.

摘要翻译： 提供了一种波分复用传输系统中的信道分配方法。 信道分配方法包括从多个光发射机获取关于信号调制方案的信息，并且考虑所获得的关于信号调制方案的信息，向各个光发射机分配信道。 因此，在传输不同调制格式的信道时，交叉相位调制被最小化，从而减少信道间干扰。

公开(公告)号：US20100142964A1

公开(公告)日：2010-06-10

申请号：US12581797

申请日：2009-10-19

申请人： Sun-hyok Chang ,  Hwan-seok Chung ,  Sang-soo Lee ,  Kwang-joon Kim

发明人： Sun-hyok Chang ,  Hwan-seok Chung ,  Sang-soo Lee ,  Kwang-joon Kim

IPC分类号： H04B10/04 ,  H04B10/00 ,  H04B10/12

CPC分类号： H04B10/50575 ,  H04B10/5053

摘要： An optical transmission apparatus for high-speed optical signal transmission is provided. The optical transmission apparatus includes an optical modulator which includes first and second modulators of a Mach-Zehnder (MZ) interferometer type which are connected in parallel, and an output stabilizer which controls biases for the first modulator, the second modulator and the optical modulator and stabilizes a final output optical signal of the optical modulator. The optical transmission apparatus can perform a stable optical signal output.

摘要翻译： 提供了一种用于高速光信号传输的光传输装置。 光传输装置包括光调制器，其包括并联连接的马赫 - 曾德（MZ）干涉仪类型的第一和第二调制器和控制第一调制器，第二调制器和光调制器的偏置的输出稳定器，以及 稳定光调制器的最终输出光信号。 光传输装置可以执行稳定的光信号输出。