公开(公告)号：US08670679B2

公开(公告)日：2014-03-11

申请号：US13231328

申请日：2011-09-13

Applicant: Hwan Seok Chung ,  Sun Hyok Chang

Inventor： Hwan Seok Chung ,  Sun Hyok Chang

IPC: H04B10/06

CPC classification number: H04J14/002 ,  H04B10/614 ,  H04B10/616

Abstract: Provided is a coherent optical receiving apparatus and an optical signal processing method. The coherent optical receiving apparatus may include an optical hybrid unit to generate an optical signal by combining a first optical signal inputted from an optical transmitting apparatus and a second optical signal inputted from a local oscillator, a polarization demuxer to demultiplex the optical signal outputted from the optical hybridizing unit, a frequency offset compensator to estimate a frequency offset of at least one of even-numbered samples and odd-numbered samples, and to compensate for a frequency offset of the even-numbered samples and a frequency offset of the odd-numbered samples using the at least one estimated frequency offset, and a carver distortion compensator to compensate for phase distortions of the samples for which the compensation for the frequency offset is performed, the phase distortions being generated by the optical transmitting apparatus.

Abstract translation: 提供了一种相干光接收装置和光信号处理方法。 相干光接收装置可以包括：光混合单元，用于通过组合从光发射装置输入的第一光信号和从本机振荡器输入的第二光信号来产生光信号;偏振解复用器，用于对从 光学杂交单元，用于估计偶数样本和奇数样本中的至少一个的频率偏移的频率偏移补偿器，并且补偿偶数样本的频率偏移和奇数编号的频率偏移 使用所述至少一个估计频率偏移的采样，以及用于补偿执行对所述频率偏移的补偿的样本的相位失真的雕刻失真补偿器，所述相位失真由所述光发送装置产生。

公开(公告)号：US08036527B2

公开(公告)日：2011-10-11

申请号：US12053400

申请日：2008-03-21

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

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

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

CPC classification number: H04J14/029 ,  H04J14/0284

Abstract: 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.

Abstract translation: 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：US07385753B2

公开(公告)日：2008-06-10

申请号：US11010350

申请日：2004-12-14

Applicant: Hee Sang Chung ,  Sun Hyok Chang ,  Kwangjoon Kim

Inventor： Hee Sang Chung ,  Sun Hyok Chang ,  Kwangjoon Kim

IPC: H01S3/00

CPC classification number: H01S3/2375 ,  H01S3/06754 ,  H01S3/10007 ,  H01S3/302 ,  H01S5/1071 ,  H01S5/12 ,  H01S5/125 ,  H01S5/14 ,  H01S5/5072

Abstract: Provided is a hybrid optical amplifier using a gain-clamped semiconductor optical amplifier enabling Raman amplification. The hybrid optical amplifier comprises a spool of optical fiber used as transmission line in the optical communication, a GCSOA amplifying optical signal input via the optical fiber and generating a self-oscillation laser beam for gain-clamping through the gain medium, and a backward pumping Raman optical amplifier inducing Raman amplification by emitting the self-oscillation laser beam generated by the GCSOA into the optical fiber. Therefore, the Raman amplification can be obtained with a relatively simple structure using the GCSOA.

Abstract translation: 提供了一种使用拉曼放大器的增益钳位半导体光放大器的混合光放大器。 混合光放大器包括用作光通信中的传输线的光纤卷轴，经由光纤输入的GCSOA放大光信号，并通过增益介质产生用于增益钳位的自激振荡激光束，以及反向泵浦 拉曼光放大器通过将由GCSOA产生的自激振荡激光束发射到光纤中来诱导拉曼放大。 因此，使用GCSOA可以通过相对简单的结构获得拉曼放大。

公开(公告)号：US06992816B2

公开(公告)日：2006-01-31

申请号：US10729088

申请日：2003-12-04

Applicant: Hee Sang Chung ,  Won Kyoung Lee ,  Sun Hyok Chang ,  Hyun Jae Lee ,  Moo Jung Chu ,  Han Hyub Lee ,  Dong Han Lee ,  Yong Bae Lee

Inventor： Hee Sang Chung ,  Won Kyoung Lee ,  Sun Hyok Chang ,  Hyun Jae Lee ,  Moo Jung Chu ,  Han Hyub Lee ,  Dong Han Lee ,  Yong Bae Lee

IPC: H01S3/00

CPC classification number: H01S3/06758 ,  H01S3/1301 ,  H01S3/302 ,  H01S2301/04

Abstract: The present invention provides an apparatus and method for compensating for the variation of a gain spectrum attributable to the temperature variation of a fiber amplifier, and a long-wavelength band dispersion-compensating hybrid amplifier equipped with the gain spectrum compensating apparatus. The apparatus includes a DCF located between a first amplification stage and a second amplification stage to compensate for dispersion of an optical signal output from the first amplification stage and perform Raman amplification of the optical signal using input pumping light; at least one pumping light provision means for providing forward or backward pumping light to the DCF; first and second temperature detection means for detecting temperature variations of the first and second amplification stages, respectively; and control means for controlling intensity of the pumping light of the pumping light provision means according to the detected temperature variations.

Abstract translation: 本发明提供一种用于补偿归因于光纤放大器的温度变化的增益谱的变化的装置和方法，以及配备有增益谱补偿装置的长波长带色散补偿混合放大器。 该装置包括位于第一放大级和第二放大级之间的DCF，以补偿从第一放大级输出的光信号的色散，并使用输入泵浦光执行光信号的拉曼放大; 至少一个泵送光提供装置，用于向DCF提供向前或向后的泵浦光; 第一和第二温度检测装置，用于分别检测第一和第二放大级的温度变化; 以及用于根据检测到的温度变化来控制泵送光提供装置的泵浦光的强度的控制装置。

公开(公告)号：US20130163992A1

公开(公告)日：2013-06-27

申请号：US13609908

申请日：2012-09-11

Applicant: Hwan Seok CHUNG ,  Sun Hyok CHANG

Inventor： Hwan Seok CHUNG ,  Sun Hyok CHANG

IPC: H04J14/00

CPC classification number: H04J14/026 ,  H04J14/0224

Abstract: Disclosed is an optical signal transmitting apparatus including: an optical carrier generator configured to generate a plurality of optical carriers and outputs the optical carriers to optical modulators corresponding to the optical carriers, respectively; a plurality of optical modulators configured to modulate the optical carriers, respectively, according to an input signal; and an optical combiner configured to couple a plurality of optical signals from the plurality of optical modulators.

Abstract translation: 公开了一种光信号发送装置，包括：光载波发生器，被配置为生成多个光载波并将光载波分别输出到对应于光载波的光调制器; 多个光调制器，被配置为分别根据输入信号调制光载波; 以及光学组合器，被配置为耦合来自所述多个光学调制器的多个光信号。

公开(公告)号：US20130163072A1

公开(公告)日：2013-06-27

申请号：US13609951

申请日：2012-09-11

Applicant: Sun Hyok CHANG ,  Hwan Seok CHUNG

Inventor： Sun Hyok CHANG ,  Hwan Seok CHUNG

IPC: H01S3/067 ,  G02B6/26 ,  G02B6/036

CPC classification number: G02B6/02042 ,  H01S3/06737 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/094011 ,  H01S3/09408

Abstract: The multi-core optical fiber amplifier according to an exemplary embodiment of the present invention having the above configuration includes: a double clad multi-core optical fiber including a plurality of cores, an internal cladding enclosing the plurality of cores, and an external cladding enclosing the internal cladding; a pumping light source outputting pumping light; an optical fiber to which pumping light from the pumping light source is input; and a wavelength division multiplexing coupler coupling the optical fiber with the double clad multi-core optical fiber to apply the pumping light input to the optical fiber from the pumping light source to the double clad multi-core optical fiber.

Abstract translation: 根据具有上述结构的本发明的示例性实施例的多芯光纤放大器包括：包括多个芯的双包层多芯光纤，包围所述多个芯的内部包层以及包围所述多个芯的外部包层 内部包层; 输出泵浦光的泵浦光源; 输入来自泵浦光源的泵浦光的光纤; 以及波分复用耦合器，其将光纤与双包层多芯光纤耦合，以将泵浦光输入从泵浦光源施加到双包层多芯光纤。

公开(公告)号：US20130051804A1

公开(公告)日：2013-02-28

申请号：US13589436

申请日：2012-08-20

Applicant: Hwan Seok CHUNG ,  Sun Hyok CHANG

Inventor： Hwan Seok CHUNG ,  Sun Hyok CHANG

IPC: H04J14/00

CPC classification number: H04B10/5563 ,  H04L27/2697

Abstract: Disclosed is an orthogonal frequency division multiplexing (OFDM) optical transmitter including a signal size adjustor for amplifying plural data signals modulated based on an OFDM scheme with different amplification rates so that each data signal is amplified according to a size of the corresponding data signal. Accordingly, it is possible to reduce a peak-to-average power ratio, and thus a nonlinear phenomenon generated in an optical line can be reduced and the quality of an OFDM optical signal can be improved.

Abstract translation: 公开了一种正交频分复用（OFDM）光发射机，其包括信号尺寸调整器，用于放大根据具有不同放大率的OFDM方案调制的多个数据信号，使得每个数据信号根据相应数据信号的大小进行放大。 因此，能够降低峰均功率比，能够降低光线路中产生的非线性现象，提高OFDM光信号的质量。

公开(公告)号：US08224190B2

公开(公告)日：2012-07-17

申请号：US12618579

申请日：2009-11-13

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

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

IPC: H04B10/04

CPC classification number: H04B10/2557 ,  H04J14/0224 ,  H04J14/0257 ,  H04J14/026 ,  H04J14/0279

Abstract: 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.

Abstract translation: 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：US08155521B2

公开(公告)日：2012-04-10

申请号：US12514977

申请日：2006-12-06

Applicant: Hwan-Seok Chung ,  Kwangloon Kim ,  Sang-Soo Lee ,  Sun-Hyok Chang

Inventor： Hwan-Seok Chung ,  Kwangloon Kim ,  Sang-Soo Lee ,  Sun-Hyok Chang

IPC: H04J14/00

CPC classification number: H04Q11/0005 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04J14/0219 ,  H04Q2011/0015 ,  H04Q2011/0016 ,  H04Q2011/0039 ,  H04Q2011/0052

Abstract: Provided are a network node which has a wavelength switching cross-connection function and can thus interconnect paths of a wavelength-division-multiplexed optical signal and convert wavelengths, and an operating method of the network node. Accordingly, it is possible to provide a multi-degree cross-connection system having a simple structure at lower cost by allowing transmission of optical signals supposed not to be added/dropped at a network node without converting them into electrical signals and performing O/E conversion or E/O conversion only on optical signals supposed to be added/dropped at a network node. In addition, it is possible to increase the expandability of networks by regenerating degraded signals and which can effectively utilize bandwidths by grooming low-speed electrical digital hierarchy signals and transmitting them as high-speed optical signals. Moreover, it is possible to increase the availability of network resources by performing wavelength conversion without the need of additional wavelength converters. Furthermore, it is possible to prevent multiplexed optical signals from being degraded by filtering even when the multiplexed optical signals are not demultiplexed into wavelengths. Still furthermore, it is possible to perform a multicast operation on input wavelengths.

Abstract translation: 提供了具有波长切换交叉连接功能并且因此可以互连波分复用光信号的路径并转换波长的网络节点以及网络节点的操作方法。 因此，可以通过允许在网络节点处不被添加/丢弃的光信号的传输而不将它们转换成电信号并执行O / E来提供具有简单结构的多级交叉连接系统，其具有较低的成本 转换或E / O转换仅在光网络节点上被添加/删除的信号上。 此外，可以通过再生劣化信号来增加网络的可扩展性，并且可以通过梳理低速电子数字分层信号并将其作为高速光信号传输来有效地利用带宽。 此外，可以通过执行波长转换来增加网络资源的可用性，而不需要额外的波长转换器。 此外，即使当复用的光信号未被解复用为波长时，也可以防止多路复用的光信号被滤波劣化。 此外，可以对输入波长执行多播操作。

公开(公告)号：US20120070149A1

公开(公告)日：2012-03-22

申请号：US13231328

申请日：2011-09-13

Applicant: Hwan Seok CHUNG ,  Sun Hyok Chang

Inventor： Hwan Seok CHUNG ,  Sun Hyok Chang

IPC: H04J14/06

CPC classification number: H04J14/002 ,  H04B10/614 ,  H04B10/616

Abstract: Provided is a coherent optical receiving apparatus and an optical signal processing method. The coherent optical receiving apparatus may include an optical hybrid unit to generate an optical signal by combining a first optical signal inputted from an optical transmitting apparatus and a second optical signal inputted from a local oscillator, a polarization demuxer to demultiplex the optical signal outputted from the optical hybridizing unit, a frequency offset compensator to estimate a frequency offset of at least one of even-numbered samples and odd-numbered samples, and to compensate for a frequency offset of the even-numbered samples and a frequency offset of the odd-numbered samples using the at least one estimated frequency offset, and a carver distortion compensator to compensate for phase distortions of the samples for which the compensation for the frequency offset is performed, the phase distortions being generated by the optical transmitting apparatus.

Abstract translation: 提供了一种相干光接收装置和光信号处理方法。 相干光接收装置可以包括：光混合单元，用于通过组合从光发射装置输入的第一光信号和从本机振荡器输入的第二光信号来产生光信号;偏振解复用器，用于对从 光学杂交单元，用于估计偶数样本和奇数样本中的至少一个的频率偏移的频率偏移补偿器，并且补偿偶数样本的频率偏移和奇数编号的频率偏移 使用所述至少一个估计频率偏移的采样，以及用于补偿执行对所述频率偏移的补偿的样本的相位失真的雕刻失真补偿器，所述相位失真由所述光发送装置产生。