公开(公告)号：US5751468A

公开(公告)日：1998-05-12

申请号：US717127

申请日：1996-09-20

Applicant: Kyung-Sook Hyun ,  O-Kyun Kwon ,  Kwang-Joon Kim ,  El-Hang Lee

Inventor： Kyung-Sook Hyun ,  O-Kyun Kwon ,  Kwang-Joon Kim ,  El-Hang Lee

IPC: G02B26/00 ,  G02F1/017 ,  G02F1/09

CPC classification number: B82Y20/00 ,  G02F1/017 ,  G02F2201/346

Abstract: A vertical modulator with a dual mode distributed Bragg reflection (DBR), includes a pair of integrated elements using different wavelengths to provide functions of logical operation, data switching and wavelength conversion. The optical device includes a first optical structure operating at a first wavelength (.lambda..sub.1) and a second optical structure operating at a second wavelength (.lambda..sub.2). The first and second optical structures are formed over a semiconductor substrate. The first optical structure, which operates at the first wavelength (.lambda..sub.1), transmits its data to the second optical structure so that data corresponding to the second wavelength (.lambda..sub.2) can be output. Since the wavelength of input light is different from the wavelength of output light, the optical device serves as a modulator which performs a logic operation and switching function while carrying out wavelength conversion.

Abstract translation: 具有双模式分布式布拉格反射（DBR）的垂直调制器包括使用不同波长的一对集成元件，以提供逻辑运算，数据切换和波长转换的功能。 光学器件包括以第一波长（λ1）工作的第一光学结构和以第二波长（λ2）操作的第二光学结构。 第一和第二光学结构形成在半导体衬底上。 在第一波长（λ1）下操作的第一光学结构将其数据传输到第二光学结构，使得可以输出对应于第二波长（λ2）的数据。 由于输入光的波长与输出光的波长不同，所以光学器件用作在执行波长转换时执行逻辑运算和切换功能的调制器。

公开(公告)号：US08565620B2

公开(公告)日：2013-10-22

申请号：US12912870

申请日：2010-10-27

Applicant: Hwan-Seok Chung ,  Sun-Hyok Chang ,  Jyung-Chan Lee ,  Kwang-Joon Kim

Inventor： Hwan-Seok Chung ,  Sun-Hyok Chang ,  Jyung-Chan Lee ,  Kwang-Joon Kim

IPC: H04B10/06

CPC classification number: H04B10/677

Abstract: An apparatus for receiving optical signals in DQPSK and method of controlling a phase offset in receiving optical signals for DQPSK is provided. An original optical signal modulated in DQPSK is received. The original optical signal is delayed by one bit to make a delay optical signal such that an interference on the original optical signal and the delay optical signal is performed. A control signal is generated by use of an interference result between the original optical signal and the delay optical signal. A phase offset for the interference between the original optical signal and the delay optical signal is controlled by use of the generated control signal. In receiving optical signals, the phase offset between the delay optical signal and the original optical signal is precisely controlled, thereby optimizing the transfer characteristics of an optical delay interferometer.

Abstract translation: 提供一种用于接收DQPSK中的光信号的装置以及控制接收用于DQPSK的光信号的相位偏移的方法。 接收以DQPSK调制的原始光信号。 原始光信号被延迟一位以产生延迟光信号，使得对原始光信号和延迟光信号的干扰被执行。 通过使用原始光信号和延迟光信号之间的干扰结果来产生控制信号。 通过使用所生成的控制信号来控制原始光信号与延迟光信号之间的干扰的相位偏移。 在接收光信号时，精确控制延迟光信号与原始光信号之间的相位偏移，从而优化光延迟干涉仪的传输特性。

公开(公告)号：US08406625B2

公开(公告)日：2013-03-26

申请号：US12486642

申请日：2009-06-17

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: H04J14/00

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

Abstract: 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.

Abstract translation: 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：US08260154B2

公开(公告)日：2012-09-04

申请号：US12643087

申请日：2009-12-21

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

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

IPC: H04B10/06

CPC classification number: H04B10/25073 ,  H04B10/2569 ,  H04B10/60 ,  H04B10/611 ,  H04B10/6161 ,  H04B10/6162

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08254291B2

公开(公告)日：2012-08-28

申请号：US12638002

申请日：2009-12-15

Applicant: Kye-hyun Ahn ,  Seung-hwan Kim ,  Yong-tae Kim ,  Kyeong-eun Han ,  Kwang-joon Kim

Inventor： Kye-hyun Ahn ,  Seung-hwan Kim ,  Yong-tae Kim ,  Kyeong-eun Han ,  Kwang-joon Kim

IPC: H04L12/28

CPC classification number: H04L25/14

Abstract: An Ethernet device having multiple lanes and a method of operating the lanes are provided. In one general aspect, it is possible to allocate a dummy block to each of one or more lanes such that the lanes do not selectively participate in communications. In addition, on a receiving side, the dummy block can be removed from among the genuine data blocks to enable data to be decoded. In this case, an Ethernet device on a transmission side and an Ethernet device on a receiving side can exchange information of a lane to which the dummy block is allocated by use of a lane status message, and the lane status message may be based on a link fault message specified by Ethernet standards.

Abstract translation: 提供了一种具有多个通道的以太网设备和一个操作车道的方法。 在一个一般方面，可以将一个虚拟块分配给一个或多个车道中的每一个，使得车道不选择性地参与通信。 此外，在接收侧，可以从正版数据块中移除伪块，以使数据被解码。 在这种情况下，发送侧的以太网设备和接收侧的以太网设备可以通过使用车道状态消息来交换分配了虚拟块的通道的信息，并且车道状态消息可以基于 链路故障信息由以太网标准指定。

公开(公告)号：US20110090992A1

公开(公告)日：2011-04-21

申请号：US12872506

申请日：2010-08-31

Applicant: Hwan-Seok CHUNG ,  Sun-Hyok Chang ,  Kwang-Joon Kim

Inventor： Hwan-Seok CHUNG ,  Sun-Hyok Chang ,  Kwang-Joon Kim

IPC: H04L27/22

CPC classification number: H04L27/2647 ,  H04L27/0014 ,  H04L27/2657 ,  H04L27/364

Abstract: An OFDM receiver for compensating for I/Q imbalance is provided. The OFDM receiver includes an I/Q demodulator demodulating a received signal into a baseband in-phase (I) channel signal and a baseband quadrature (Q) channel signal, and an I/Q imbalance compensator compensating for imbalance between the I-channel signal and the Q-channel signal in a time domain. Accordingly, it is possible to solve the I/Q imbalance and suppress degradation in the performance of the OFDM communication device.

Abstract translation: 提供了用于补偿I / Q不平衡的OFDM接收机。 OFDM接收机包括将接收信号解调为基带同相（I）信道信号和基带正交（Q）信道信号的I / Q解调器，以及补偿I信道信号之间的不平衡的I / Q不平衡补偿器 和时域中的Q信道信号。 因此，可以解决I / Q不平衡并且抑制OFDM通信设备的性能的劣化。

公开(公告)号：US20110026924A1

公开(公告)日：2011-02-03

申请号：US12821465

申请日：2010-06-23

Applicant: Hwan-Seok Chung ,  Sun-Hyok Chang ,  Kwang-Joon Kim

Inventor： Hwan-Seok Chung ,  Sun-Hyok Chang ,  Kwang-Joon Kim

IPC: H04J14/02 ,  H04B10/04

CPC classification number: H04B10/5055 ,  H04B10/548 ,  H04L27/2626 ,  H04L27/2697

Abstract: An OFDM optical transmitter and optical transmission method is provided. The OFDM optical transmitter includes a signal converter controlling amplitude of each of data signals according to a position of each of the data signals and converting the controlled data signal into a time-domain signal. Accordingly, it is possible to generate optical OFDM carriers which are uniform in size.

Abstract translation: 提供了一种OFDM光发射机和光传输方法。 OFDM光发射机包括信号转换器，其根据每个数据信号的位置控制每个数据信号的幅度，并将受控数据信号转换成时域信号。 因此，可以生成尺寸一致的光OFDM载波。

公开(公告)号：US20100287402A1

公开(公告)日：2010-11-11

申请号：US12776875

申请日：2010-05-10

Applicant: Seung-Hwan KIM ,  Kwang-Joon Kim ,  June-Koo Rhee ,  Kyu-Sang Lee ,  Chan-Kyun Lee ,  Seong-Jin Lim

Inventor： Seung-Hwan KIM ,  Kwang-Joon Kim ,  June-Koo Rhee ,  Kyu-Sang Lee ,  Chan-Kyun Lee ,  Seong-Jin Lim

IPC: G06F1/12

CPC classification number: H04L67/325 ,  H04J3/067 ,  H04L63/123 ,  H04L69/28 ,  H04L2463/121

Abstract: A timestamping apparatus and method are provided. The timestamping apparatus implements timestamping on a synchronization message at a physical layer when the synchronization message is transmitted to the physical layer. At an application layer of the timestamping apparatus, a bit stream including a start indicator bit informing a start of a pseudo random number sequence, the pseudo random number sequence, and an end indicator bit informing an end of the pseudo random number sequence is generated to check whether or not a message received from the physical layer is the synchronization message, and is inserted as signature information of the synchronization message. At the physical layer of the timestamping apparatus, the signature information included in the synchronization message is detected, and timestamping information is generated when the signature information is detected.

Abstract translation: 提供了一种时间戳装置和方法。 当同步消息被发送到物理层时，时间戳装置在物理层上的同步消息上实现时间戳。 在时间戳装置的应用层，生成包括通知伪随机数序列开始的开始指示符位，伪随机数序列以及通知伪随机数序列结束的结束指示符位的位流， 检查从物理层接收的消息是否是同步消息，并作为同步消息的签名信息插入。 在时间戳装置的物理层，检测包括在同步消息中的签名信息，并且当检测到签名信息时生成时间戳信息。

公开(公告)号：US07755073B2

公开(公告)日：2010-07-13

申请号：US12361522

申请日：2009-01-28

Applicant: Bong Kyu Kim ,  Sang Jo Park ,  Heuk Park ,  Kwang Joon Kim

Inventor： Bong Kyu Kim ,  Sang Jo Park ,  Heuk Park ,  Kwang Joon Kim

IPC: H04J14/00

CPC classification number: H04J14/005

Abstract: Provided are an acousto-optic filter and an optical code division multiple access (CDMA) system using the acousto-optic filter. The acousto-optic filer includes: an acousto-optic mode converter (AOMC) converting an optical signal of a specific optical frequency corresponding to a frequency of an electric signal of an optical signal of a first mode having a predetermined optical frequency band; and a mode stripper (MS) stripping an optical signal of the optical signal of the first mode that has been converted to a second mode.

Abstract translation: 提供了声光滤波器和使用声光滤波器的光码分多址（CDMA）系统。 声光滤波器包括：声光模式转换器（AOMC），其转换对应于具有预定光频带的第一模式的光信号的电信号的频率的特定光频率的光信号; 以及模式剥离器（MS）剥离已经转换为第二模式的第一模式的光信号的光信号。

公开(公告)号：US20100158523A1

公开(公告)日：2010-06-24

申请号：US12580177

申请日：2009-10-15

Applicant: Kyeong-eun Han ,  Kwang-joon Kim

Inventor： Kyeong-eun Han ,  Kwang-joon Kim

IPC: H04J14/00

CPC classification number: H04J14/0282 ,  H04J14/0232 ,  H04J14/0238 ,  H04J14/0246

Abstract: 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.

Abstract translation: 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。