公开(公告)号：US20080107427A1

公开(公告)日：2008-05-08

申请号：US12004709

申请日：2007-12-21

申请人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

发明人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

IPC分类号： H04B10/04

CPC分类号： H04B10/505 ,  H04B10/541

摘要： The present invention relates to none return to zero (NRZ) modulation method. The NRZ optical modulation is performed by combining a clock signal and NRZ data at a sending end and signal distortion capable of being generated when the clock signal and the NRZ data are combined is optimized by controlling the magnitude and phase of the clock signal. At the receiving end, the clock signal is extracted by performing narrow band band-pass filtering of the detected optical signal transmitted from a transmitter and data is recovered using the clock signal. Therefore, a receiver structure for clock extraction is simpler, an error rate of data recovery is lower by clearly extracting the clock signal, and transmission distance of the optical signal is longer.

摘要翻译： 本发明涉及无归零（NRZ）调制方法。 通过组合发送端的时钟信号和NRZ数据并且通过控制时钟信号的幅度和相位来优化当时钟信号和NRZ数据组合时能产生的信号失真来执行NRZ光调制。 在接收端，通过对从发送器发送的检测到的光信号进行窄带带通滤波来提取时钟信号，并且使用时钟信号恢复数据。 因此，用于时钟提取的接收机结构更简单，通过清楚地提取时钟信号，数据恢复的错误率较低，并且光信号的传输距离更长。

公开(公告)号：US20050095002A1

公开(公告)日：2005-05-05

申请号：US10860903

申请日：2004-06-03

申请人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

发明人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

IPC分类号： H04B10/04 ,  H04B10/155 ,  H04J14/08 ,  H04L27/00

CPC分类号： H04B10/505 ,  H04B10/541

摘要： The present invention relates to none return to zero (NRZ) modulation method. The NRZ optical modulation is performed by combining a clock signal and NRZ data at a sending end and signal distortion capable of being generated when the clock signal and the NRZ data are combined is optimized by controlling the magnitude and phase of the clock signal. At the receiving end, the clock signal is extracted by performing narrow band band-pass filtering of the detected optical signal transmitted from a transmitter and data is recovered using the clock signal. Therefore, a receiver structure for clock extraction is simpler, an error rate of data recovery is lower by clearly extracting the clock signal, and transmission distance of the optical signal is longer.

摘要翻译： 本发明涉及无归零（NRZ）调制方法。 通过组合发送端的时钟信号和NRZ数据并且通过控制时钟信号的幅度和相位来优化当时钟信号和NRZ数据组合时能产生的信号失真来执行NRZ光调制。 在接收端，通过对从发送器发送的检测到的光信号进行窄带带通滤波来提取时钟信号，并且使用时钟信号恢复数据。 因此，用于时钟提取的接收机结构更简单，通过清楚地提取时钟信号，数据恢复的错误率较低，并且光信号的传输距离更长。

公开(公告)号：US20050094130A1

公开(公告)日：2005-05-05

申请号：US10938078

申请日：2004-09-10

申请人： Ki Han ,  Wangjoo Lee ,  Je Ko

发明人： Ki Han ,  Wangjoo Lee ,  Je Ko

IPC分类号： H04B10/17 ,  H04B10/00 ,  H04B10/02 ,  H04B10/08 ,  H04B10/135 ,  H04J14/02 ,  H04J14/06 ,  G01N21/00 ,  G02F1/01

CPC分类号： H04B10/07953 ,  H04B10/532 ,  H04J14/02 ,  H04J14/06

摘要： An apparatus and method for monitoring an optical signal are provided. In the apparatus, a polarization adjusting unit converts the state of polarization of an optical signal. A polarization beam splitter splits the optical signal into a first polarization component and a second polarization component perpendicular to each other. An optical intensity measuring unit measures the optical intensity of the first polarization component. A feedback control unit controls the polarization adjusting unit so that the first and second polarization components are aligned to the two axes of the polarization beam splitter. A scrambler scrambles the optical signal input to the transmission optical fiber. According to the apparatus and method, optical signal-to-noise ratio (OSNR) can be measured accurately.

摘要翻译： 提供了一种用于监视光信号的装置和方法。 在该装置中，偏振调整单元转换光信号的偏振状态。 偏振分束器将光信号分离成彼此垂直的第一偏振分量和第二偏振分量。 光强度测量单元测量第一偏振分量的光强度。 反馈控制单元控制偏振调节单元，使得第一和第二偏振分量与偏振分束器的两个轴对准。 加扰器加扰输入到传输光纤的光信号。 根据该装置和方法，可以精确地测量光信噪比（OSNR）。

公开(公告)号：US20050105916A1

公开(公告)日：2005-05-19

申请号：US10972145

申请日：2004-10-25

申请人： Dong Lee ,  Man Lee ,  Sang Lee ,  Je Ko

发明人： Dong Lee ,  Man Lee ,  Sang Lee ,  Je Ko

IPC分类号： H04B10/04 ,  H04B10/155 ,  H04B10/12

CPC分类号： H04B10/5055 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5162 ,  H04B10/5165 ,  H04B10/5561

摘要： The present invention relates to an optical transmitter for generating a duobinary Carrier Suppressed Return-to-Zero (CSRZ) optical signal and a CSRZ-Differential Phase Shift Keying (DPSK) optical signal for use in an optical communication system. The optical transmitter includes a data encoder, an electric mixer and a single Mach-Zehnder interferometer type external, and is capable of reducing the optical spectrum bandwidth of the optical signal using electrical band limiting and reducing the optical signal distortion caused by Group Velocity Dispersion (GVD) in an optical fiber.

摘要翻译： 本发明涉及用于在光通信系统中使用的双向载波抑制归零（CSRZ）光信号和CSRZ-差分相移键控（DPSK）光信号的光发射机。 光发射机包括数据编码器，电动混频器和外部单马赫 - 策德干涉仪，并且能够使用电带限制来降低光信号的光谱带宽并且减小由组速度色散引起的光信号失真（ GVD）。

公开(公告)号：US20070071039A1

公开(公告)日：2007-03-29

申请号：US11406105

申请日：2006-04-18

申请人： Joon Bang ,  Hyun Cho ,  Sang Lim ,  Wang Lee ,  Je Ko

发明人： Joon Bang ,  Hyun Cho ,  Sang Lim ,  Wang Lee ,  Je Ko

IPC分类号： H04J3/04

CPC分类号： H04J3/0685 ,  H04J3/047

摘要： Provided are a time-division data multiplexing/demultiplexing system and method capable of preventing errors in processing data signals which occur due to a phase difference between data signals and a multiplexing reference clock in a multiplexing process or a phase difference between a multiplexed data signal and a demultiplexing reference clock in a demultiplexing process. The time-division data multiplexing system includes: a phase adjusting unit which adjusts a phase of each of a plurality of data signals having different phases from one another for enabling the data signals to be time-division multiplexed when a plurality of values of the data signals indicate a stable state; and a multiplexer time-division multiplexing the phase adjusted data signals according to a multiplexing reference clock.

摘要翻译： 提供了一种时分数据复用/解复用系统和方法，其能够防止由于复用处理中的数据信号和多路复用基准时钟之间的相位差而产生的数据信号的错误或多路复用数据信号与 解复用处理中的解复用参考时钟。 时分数据复用系统包括：相位调整单元，用于相互调整具有不同相位的多个数据信号中的每一个的相位，以使数据信号能够在数据的多个值时进行时分复用 信号表示稳定状态; 以及多路复用器根据复用参考时钟对相位调整的数据信号进行时分复用。

公开(公告)号：US20050129408A1

公开(公告)日：2005-06-16

申请号：US10930081

申请日：2004-08-30

申请人： Byoung Kim ,  Je Ko

发明人： Byoung Kim ,  Je Ko

IPC分类号： H04B10/16 ,  H04B10/00 ,  H04B10/12

CPC分类号： H04B10/85

摘要： An optical transmission system for removing skew between optical channels is provided. The optical transmission system comprises an optical signal transmitter and an optical signal receiver. The optical transmitter inserts serial numbers into an overhead of a frame, delays the frame by a time corresponding to skew information transmitted from an opposite optical transmission system, and transmits the frame. The optical signal receiver receives the frame from the opposite optical transmission system via fiber optics, removes skew existing in the received frame in units of both a byte and a frame by referring to the serial numbers stored in the overhead of the frame, and transmits the skew information collected when the skew is removed, to the opposite optical transmission system.

摘要翻译： 提供了用于消除光通道之间的偏斜的光传输系统。 光传输系统包括光信号发射机和光信号接收机。 光发射机将序列号插入到帧的开销中，将帧延迟与从相对的光传输系统发送的偏斜信息对应的时间，并发送帧。 光信号接收机通过光纤从相对的光传输系统接收帧，通过参考存储在帧的开销中的序列号来消除以字节和帧为单位在接收帧中存在的斜率，并发送 将偏斜消除时收集到的偏斜信息传送到相对的光传输系统。

公开(公告)号：US20070088991A1

公开(公告)日：2007-04-19

申请号：US11417980

申请日：2006-05-04

申请人： Jong Shin ,  Je Ko

发明人： Jong Shin ,  Je Ko

IPC分类号： G06K5/04 ,  G11B5/00 ,  G11B20/20

CPC分类号： H04L1/242

摘要： A multi-channel data verifying apparatus and method are provided. The apparatus includes a receiver receiving N data channels and a deskew channel generated by sequentially extracting a predetermined data bit from the each of N data channels, and a deskew channel error detector detecting whether the deskew channel received by the receiver corresponds to an expected deskew channel generated and stored based on the test signal or generated based on the previously received deskew channel. Accordingly, data channels, a deskew channel and the entire data capacity can be verified and thus the cause of a problem in the transmission and reception of multi-channel data can be identified in advance.

摘要翻译： 提供了一种多通道数据验证装置和方法。 该装置包括接收N个数据信道的接收机和通过从N个数据信道中的每一个顺序地提取预定的数据位而生成的去歪斜信道，以及歪斜通道误差检测器，检测由接收机接收的歪斜通道是否对应于预期的歪斜通道 基于测试信号生成和存储，或者基于先前接收到的偏移通道生成。 因此，可以验证数据信道，歪斜通道和整个数据容量，因此可以预先识别多信道数据的发送和接收中的问题的原因。

公开(公告)号：US20070058241A1

公开(公告)日：2007-03-15

申请号：US11454676

申请日：2006-06-15

申请人： Sun Chang ,  Kwang Kim ,  Je Ko

发明人： Sun Chang ,  Kwang Kim ,  Je Ko

IPC分类号： H01S3/00 ,  H04B10/12

摘要： An optical amplification apparatus having a function of flattening a channel output spectrum is provided. The optical amplification apparatus includes an optical amplifier amplifying an input optical signal and outputting an output optical signal; a pump unit pumping the input optical signal at a front and a back of the optical amplifier; a first detection unit selecting a plurality of particular channels with respect to a separated part of the input optical signal to be input to an input terminal of the optical amplifier and converting an input optical signal in each of the selected channels into an electrical signal; a second detection unit selecting the same channels as the plurality of particular channels selected by the first detection unit with respect to a separated part of the output optical signal output from an output terminal of the optical amplifier and converting an output optical signal in each of the selected channels into an electrical signal; and a controller receiving electrical signals respectively in the selected channels from the first and second detection units, determining whether an optical signal gain for each of the particular channels has changed, and controlling a current provided to the pump unit according to the change in the optical signal gain, thereby accomplishing automatic gain control (AGC) and automatic level control (ALC) and maintaining a flatness of a wavelength division multiplexing (WDM) output.

摘要翻译： 提供具有使通道输出频谱变平的功能的光放大装置。 光放大装置包括放大输入光信号并输出​​输出光信号的光放大器; 泵单元在光放大器的前面和后面抽吸输入光信号; 第一检测单元，相对于要输入到光放大器的输入端的输入光信号的分离部分选择多个特定通道，并将每个所选通道中的输入光信号转换为电信号; 第二检测单元，相对于从光放大器的输出端输出的输出光信号的分离部分，选择与由第一检测单元选择的多个特定通道相同的通道，并将每一个的输出光信号 所选通道进入电信号; 以及控制器，分别从所述第一和第二检测单元在所选择的通道中接收电信号，确定每个所述特定通道的光学信号增益是否已经改变，以及根据所述光学器件的变化来控制提供给所述泵单元的电流 信号增益，从而实现自动增益控制（AGC）和自动电平控制（ALC）并保持波分复用（WDM）输出的平坦度。

公开(公告)号：US20070133084A1

公开(公告)日：2007-06-14

申请号：US11601817

申请日：2006-11-20

申请人： Bo Choi ,  Sang Lee ,  Chang Kim ,  Je Ko

发明人： Bo Choi ,  Sang Lee ,  Chang Kim ,  Je Ko

IPC分类号： H01S3/00 ,  H04B10/12

CPC分类号： H01S3/1302 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/0078 ,  H01S3/06758 ,  H01S3/1608 ,  H01S2301/04 ,  H04B10/294

摘要： Provided is an apparatus and method for all-optically controlling both a gain and a gain flattening. The apparatus includes: a first amplifier automatically controlling a gain of the apparatus through a feedback loop while amplifying a received optical signal; a fixed gain flattening unit receiving the amplified optical signal from the first amplifier and compensating for the gain according to a wavelength of the received optical signal; and a second amplifier automatically controlling the gain through a feedback loop while amplifying the optical signal input from the fixed gain flattening unit. Accordingly, even if the number of channels of an input WDM optical signal varies, both of a gain and a gain flattening can be all-optically controlled.

摘要翻译： 提供了一种用于全光控制增益和增益平坦化的装置和方法。 该装置包括：第一放大器，通过反馈回路自动控制装置的增益，同时放大接收到的光信号; 固定增益平坦化单元，从第一放大器接收放大的光信号，并根据所接收的光信号的波长补偿增益; 并且第二放大器通过反馈环路自动地控制增益，同时放大从固定增益平坦化单元输入的光信号。 因此，即使输入WDM光信号的信道数量变化，增益和增益平坦化也可以全光控制。

公开(公告)号：US20070109060A1

公开(公告)日：2007-05-17

申请号：US11441655

申请日：2006-05-26

申请人： Sang Lim ,  Sang Lee ,  Hyun Cho ,  Je Ko

发明人： Sang Lim ,  Sang Lee ,  Hyun Cho ,  Je Ko

IPC分类号： H03B9/14

CPC分类号： H03B9/148 ,  H01P1/20309

摘要： Provided are an integrated dielectric resonator filter and a clock extraction device using the integrated dielectric resonator filter. The integrated dielectric resonator filter includes: a microwave substrate; a disc type dielectric resonator installed on the microwave substrate and having predetermined diameter and height; an input and output transmission line installed on both sides of the disc type dielectric resonator to transmit input and output signals; and a metal cover enclosing the disc type dielectric resonator to form a predetermined volume, opened toward the input and output transmission line, and closed in an orthogonal direction to the input and output transmission line.

摘要翻译： 提供了一种集成介质谐振器滤波器和使用集成介质谐振滤波器的时钟提取装置。 集成介质谐振器滤波器包括：微波基板; 安装在微波基板上并具有预定直径和高度的盘型介质谐振器; 安装在盘式介质谐振器两侧的输入和输出传输线，以传输输入和输出信号; 以及包围盘状介质谐振器以形成预定体积的金属盖，朝向输入和输出传输线路开口，并且沿与输入和输出传输线正交的方向封闭。