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1. 发明授权

US07394983B2 Method and apparatus for detecting optical switch fault by monitoring optical output transitions 失效
标题翻译：通过监测光输出转换来检测光开关故障的方法和装置
公开(公告)号：US07394983B2
公开(公告)日：2008-07-01
申请号：US10685795
申请日：2003-10-14
申请人： Wang-joo Lee , Kwang-joon Kim , Sung-hoon Kwak
发明人： Wang-joo Lee , Kwang-joon Kim , Sung-hoon Kwak
IPC分类号： H04J14/00
CPC分类号： G02B6/359 , G02B6/3512 , G02B6/3546 , H04Q11/0005 , H04Q2011/0015 , H04Q2011/0024 , H04Q2011/003 , H04Q2011/0039 , H04Q2011/0083
摘要： Provided are a method and an apparatus for detecting the fault of an optical switch. The apparatus includes an optical monitoring signal generator, a coupler, a splitter, a plurality of optical detecting and output power transition sensing units, and a fault determiner. The optical monitoring signal generator generates optical monitoring signals having different wavelengths from optical signals including data to be transmitted. The coupler optically couples the optical monitoring signals to the optical signals including data to be transmitted and inputs the coupled optical signals to an optical switch. The splitter splits the optical monitoring signals from optical signals output from the optical switch. The plurality of optical detecting and output power transition sensing units detect output power transitions of the split optical monitoring signals. The fault determiner receives information on setting the optical switch from an external source, compares the information with the detected output power transitions of the split optical monitoring signals, and determines whether the optical switch malfunctions depending on whether the information coincides with the detected output power transitions of the split optical monitoring signals.
摘要翻译：提供了一种用于检测光开关故障的方法和装置。该装置包括光学监视信号发生器，耦合器，分离器，多个光学检测和输出功率转换感测单元以及故障确定器。光监视信号发生器产生具有不同波长的光监视信号，光信号包括待传输的数据。耦合器将光学监视信号光耦合到包括要发送的数据的光信号，并将耦合的光信号输入到光开关。分路器从光学开关输出的光信号分离光学监控信号。多个光学检测和输出功率转换感测单元检测分离光学监视信号的输出功率转换。故障确定器接收关于从外部源设置光开关的信息，将信息与检测到的分离光监视信号的输出功率转换进行比较，并根据信号是否与检测到的输出功率转换一致，确定光开关是否发生故障的分割光学监控信号。

2. 发明申请

US20100142971A1 APPARATUS FOR SYNCHRONIZING DIGITAL SIGNALS OF COHERENT OPTICAL RECEIVER 审中-公开
标题翻译：同步光接收机的数字信号的设备
公开(公告)号：US20100142971A1
公开(公告)日：2010-06-10
申请号：US12628920
申请日：2009-12-01
申请人： Sun-hyok Chang , Hwan-seok Chung , Kwang-joon Kim
发明人： Sun-hyok Chang , Hwan-seok Chung , Kwang-joon Kim
IPC分类号： H04B10/00 , H04B10/06
CPC分类号： H04B10/614 , H04B10/61 , H04B10/611 , H04B10/6164 , H04B10/6165
摘要： Provided is a digital signal synchronization device of a coherent optical receiver. The digital signal synchronization device includes a digital signal processing unit to perform synchronization on a digital signal of an output optical signal generated by interfering an optical signal received through an optical fiber with an optical signal of laser output from a local oscillator and to perform decoding using the synchronized digital signal, and a digital signal managing unit to monitor the digital signal processing unit to output data of the optical signal normally, which has been received through the optical fiber, according to the synchronized digital signal.
摘要翻译：提供了一种相干光接收机的数字信号同步装置。数字信号同步装置包括数字信号处理单元，用于对通过光纤接收的光信号与从本地振荡器输出的激光的光信号进行干扰而产生的输出光信号的数字信号进行同步，并且使用同步数字信号和数字信号管理单元，用于监视数字信号处理单元，以根据同步的数字信号正常地输出已经通过光纤接收的光信号的数据。

3. 发明申请

US20090060504A1 APPARATUS AND METHOD FOR PROTECTION SWITCHING OF OPTICAL CHANNEL 失效
标题翻译：光通道保护切换装置及方法
公开(公告)号：US20090060504A1
公开(公告)日：2009-03-05
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： H04J14/02
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。

4. 发明授权

US06791685B2 Optical signal performance monitoring apparatus and method in multi-channel optical transmission system 有权
标题翻译：多信道光传输系统中的光信号性能监测装置及方法
公开(公告)号：US06791685B2
公开(公告)日：2004-09-14
申请号：US10066092
申请日：2002-01-31
申请人： Ji-wook Youn , Kwang-joon Kim
发明人： Ji-wook Youn , Kwang-joon Kim
IPC分类号： G01J328
CPC分类号： H04B10/07953 , G01J3/18 , G01J3/2803 , G02B6/2706 , G02B6/2766 , G02B6/2793 , G02B6/2931 , G02B6/29385 , G02B6/4215 , H04B10/077 , H04B10/07955 , H04B10/07957
摘要： An optical signal performance monitoring apparatus in a multi-channel optical transmission system and a method for monitoring the optical signal performance. The optical signal performance monitoring apparatus in the multi-channel optical transmission system includes an optical input unit for controlling the spot size of an inputted multi-channel optical signal and generating a 1st multi-channel beam; a diffraction and reflection unit for diffracting and reflecting the 1st multi-channel beam; and generating a 2nd multi-channel beam which is divided by wavelength and is in parallel with the 1st multi-channel beam; an optical collimation and concentration unit for collimating the 1st multi-channel beam and concentrating the 2nd multi-channel beam which is divided by wavelength; and an optical detection unit for measuring the intensity of the 2nd multi-channel beam focused by wavelength, and measuring the optical signal-to-noise ratio by measuring the optical intensity corresponding to each wavelength and an amplified spontaneous emission (ASE) noise strength at a point between optical signals.
摘要翻译：一种多通道光传输系统中的光信号性能监视装置和用于监视光信号性能的方法。多通道光传输系统中的光信号性能监视装置包括：光输入单元，用于控制输入的多通道光信号的光斑尺寸并产生第一多通道光束; 用于衍射和反射第一多通道光束的衍射和反射单元; 以及产生由波长除以与第一多通道光束并联的第二多通道光束; 用于准直第一多通道光束并集中被波长除以的第二个多通道光束的光学准直和浓度单元; 以及用于测量由波长聚焦的第二多通道光束的强度的光学检测单元，并且通过测量对应于每个波长的光强度和放大的自发发射（ASE）来测量光信噪比，光信号之间的一点噪声强度。

5. 发明授权

US08437636B2 Methods of transmitting and receiving multicast or broadcast frame in OLT and ONU for WDM-PON, WDM-PON system, and OLT for WDM-PON 有权
标题翻译：用于WDM-PON，WDM-PON系统和OLT用于WDM-PON的OLT和ONU中的组播或广播帧的发送和接收方法
公开(公告)号：US08437636B2
公开(公告)日：2013-05-07
申请号：US12580177
申请日：2009-10-15
申请人： Kyeong-eun Han , Kwang-joon Kim
发明人： Kyeong-eun Han , Kwang-joon Kim
IPC分类号： H04J14/00
CPC分类号： H04J14/0282 , H04J14/0232 , H04J14/0238 , H04J14/0246
摘要： Provided are methods of transmitting and receiving a multicast or broadcast frame in an optical line terminal (OLT) and an optical network unit (ONU) for a wavelength division multiplexing (WDM)-passive optical network (PON), a WDM-PON system, and an OLT for a WDM-PON. The method of transmitting a multicast or broadcast frame in an OLT for a WDM-PON includes converting and splitting a multicast or broadcast frame input using a single wavelength into a plurality of wavelengths, combining the split wavelengths, and outputting the multicast or broadcast frame. In this way, a multicast or broadcast frame can be transmitted and received, thereby providing a single copy broadcast (SCB) function in a WDM-PON.
摘要翻译：提供了在用于波分复用（WDM）无源光网络（PON），WDM-PON系统的光线路终端（OLT）和光网络单元（ONU）中发送和接收组播或广播帧的方法，和用于WDM-PON的OLT。在用于WDM-PON的OLT中发送组播或广播帧的方法包括将使用单个波长输入的多播或广播帧转换成多个波长，组合分离波长，并输出多播或广播帧。以这种方式，可以发送和接收多播或广播帧，从而在WDM-PON中提供单个复制广播（SCB）功能。

6. 发明授权

US08036527B2 Apparatus and method for protection switching of optical channel 失效
标题翻译：光通道保护切换装置及方法
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。

7. 发明授权

US08224190B2 Channel assignment method and apparatus for wavelength-division-multiplexed transmission system 有权
标题翻译：用于波分复用传输系统的信道分配方法和装置
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。

8. 发明申请

US20110008059A1 DIGITAL EQUALIZATION APPARATUS AND METHOD FOR COHERENT OPTICAL RECEIVER 失效
标题翻译：数字平均化装置和相干光接收机的方法
公开(公告)号：US20110008059A1
公开(公告)日：2011-01-13
申请号：US12643087
申请日：2009-12-21
申请人： Sun-hyok Chang , Hwan-seok Chung , Kwang-joon Kim
发明人： Sun-hyok Chang , Hwan-seok Chung , Kwang-joon Kim
IPC分类号： H04B10/06 , H03H7/30
CPC分类号： H04B10/25073 , H04B10/2569 , H04B10/60 , H04B10/611 , H04B10/6161 , H04B10/6162
摘要： Disclosed are a digital equalization apparatus for a coherent optical receiver and a digital equalization method for a coherent optical receiver, capable of compensating for chromatic dispersion and polarization impairment through a digital signal processing, and capable of performing a clock recovery and a data recovery through a digital symbol synchronization. The digital equalization apparatus and the method compensate for various impairments occurring on an optical path in a digital manner and achieve synchronization through a simple structure.
摘要翻译：公开了一种用于相干光接收机的数字均衡装置和用于相干光接收机的数字均衡方法，其能够通过数字信号处理补偿色散和极化损伤，并且能够通过一个数字信号处理器执行时钟恢复和数据恢复数字符号同步。数字均衡装置和方法以数字方式补偿在光路上发生的各种损伤，并通过简单的结构实现同步。

9. 发明申请

US20100150576A1 OPTICAL TRANSMITTING APPARATUS FOR RETURN-TO-ZERO DIFFERENTIAL PHASE-SHIFT-KEYING (RZ-DPSK) OR RETURN-TO-ZERO DIFFERENTIAL QUADRATURE PHASE SHIFT KEYING (RZ-DQPSK) 审中-公开
标题翻译：用于返回到零差分相移键控（RZ-DPSK）或返回到零差分相位相移键控（RZ-DQPSK）的光传输装置
公开(公告)号：US20100150576A1
公开(公告)日：2010-06-17
申请号：US12610985
申请日：2009-11-02
申请人： Hwan-seok Chung , Sun-hyok Chang , Kwang-joon Kim
发明人： Hwan-seok Chung , Sun-hyok Chang , Kwang-joon Kim
IPC分类号： H04B10/04
CPC分类号： H04B10/505 , G02F2001/212 , H04B10/5561
摘要： An optical transmitting apparatus is disclosed. The optical transmitting apparatus outputs a signal having the same phase characteristics as a Return-to-Zero Differential Phase-Shift-Keying (RZ-DPSK) signal by using a single phase modulator. Accordingly, it is possible to generate RZ-DPSK signals without using a separate RZ modulator.
摘要翻译：公开了一种光发射装置。光发送装置通过使用单相调制器输出具有与归零差分相移键控（RZ-DPSK）信号相同的相位特性的信号。因此，可以在不使用单独的RZ调制器的情况下产生RZ-DPSK信号。

10. 发明申请

US20100142964A1 OPTICAL TRANSMISSION APPARATUS WITH STABLE OPTICAL SIGNAL OUTPUT 审中-公开
标题翻译：具有稳定光信号输出的光传输装置
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。

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