公开(公告)号：US06570698B2

公开(公告)日：2003-05-27

申请号：US09750072

申请日：2000-12-29

申请人： Bong-Kyu Kim ,  Kwang-Joon Kim ,  Jong-Hyun Lee ,  Seung-Il Myong

发明人： Bong-Kyu Kim ,  Kwang-Joon Kim ,  Jong-Hyun Lee ,  Seung-Il Myong

IPC分类号： G02F101

CPC分类号： G02F1/0123 ,  H04B10/5051 ,  H04B10/50575 ,  H04B10/58

摘要： An apparatus and a method for modulating the optical intensity, with the noises suppressed by using a linear optical modulator, are disclosed, so that the characteristics of signals transmitted from an optical communication system can be improved, and that the resolution of the measured physical quantities can be improved in an optical measuring instrument. The method is carried out in the following manner. That is, the magnitude of frequency is measured by utilizing pilot signals and electrical signals to transfer negatively fed-back signals to an optical intensity modulator. The phase is delayed by generating pilot signals so as to suppress an amplitude noise from the pilot signal caused by nonlinear modulation at the optical intensity modulator. A linear modulation is carried out on the phase-delayed signals and on optical signals from an external source to provide a linear component. The bias voltage is adjusted in accordance with the negatively fed-back signals, and an optical intensity modulation is carried out on the linearly modulated signals and on the added signals, the added signals having been formed by combining the data signals and the pilot signals.

公开(公告)号：US06529319B2

公开(公告)日：2003-03-04

申请号：US09827211

申请日：2001-04-06

申请人： Ji-Wook Youn ,  Kwang-Joon Kim ,  Hee-Sang Chung ,  Jong-Hyun Lee

发明人： Ji-Wook Youn ,  Kwang-Joon Kim ,  Hee-Sang Chung ,  Jong-Hyun Lee

IPC分类号： H04B1012

CPC分类号： H01S3/06754 ,  H01S3/06758 ,  H01S3/10015 ,  H01S3/1301 ,  H01S2301/04

摘要： The present invention is to provide an automatic gain-controlled optical fiber amplifier, comprising: a first optical branch for branching a portion of an optical signal inputted into the optical fiber amplifier; a second optical branch for branching a portion of an optical signal outputted from the optical fiber amplifier; an optical distributor for receiving the optical signal of an input side branched partially by the first optical branch and for outputting it separately; a first wavelength selector for receiving the optical signal of a one side distributed by the optical distributor and for selecting a predetermined wavelength optical signal; a second wavelength selector for receiving the optical signal of an output side branched partially by the second optical branch and for selecting the predetermined wavelength optical signal; a signal processor for receiving the optical signal of a second side distributed by the optical distributor and the predetermined wavelength optical signal selected by the first and second optical wavelength selector and for measuring a total power of an input signal and a number of input channels; and a controller for generating a control signal according to the total power of the input signal and the number of input channels measured by the signal processor.

摘要翻译： 本发明提供一种自动增益控制光纤放大器，包括：第一光分路，用于分支输入到光纤放大器的光信号的一部分; 第二光分支，用于分支从所述光纤放大器输出的光信号的一部分; 光分配器，用于接收由第一光分支部分地分支的输入侧的光信号，并分别输出; 第一波长选择器，用于接收由光分配器分配的一侧的光信号并用于选择预定波长的光信号; 第二波长选择器，用于接收由第二光分支部分分支并用于选择预定波长光信号的输出侧的光信号; 信号处理器，用于接收由光分配器分配的第二侧的光信号和由第一和第二光波长选择器选择的预定波长光信号，并用于测量输入信号和多个输入通道的总功率; 以及控制器，用于根据输入信号的总功率和由信号处理器测量的输入通道的数量产生控制信号。

公开(公告)号：US06928243B2

公开(公告)日：2005-08-09

申请号：US09736267

申请日：2000-12-15

申请人： Ji-Wook Youn ,  Sung-Un Lee ,  Kwang-Joon Kim ,  Jong-Hyun Lee

发明人： Ji-Wook Youn ,  Sung-Un Lee ,  Kwang-Joon Kim ,  Jong-Hyun Lee

IPC分类号： H04B10/077 ,  H04B10/079 ,  H04J14/02 ,  H04B10/08

CPC分类号： H04B10/077 ,  H04B10/07955 ,  H04J14/02

摘要： The optical performance monitoring apparatus includes a first optical distributor for distributing a WDM optical signal branched from an optical transmission line, a plurality of wavelength selectors, each for selecting a predetermined wavelength optical signal from the optical signal distributed, a plurality of first optical detectors, each for detecting power of the predetermined wavelength optical signal for a corresponding one of channels selected by the wavelength selectors; and a signal processor for measuring the power for each channel of the WDM optical signal, a total ASE noise power, and an optical signal-to-noise ratio for each channel from the digital value.

摘要翻译： 光学性能监视装置包括用于分配从光传输线分支的WDM光信号的第一光分配器，用于从分配的光信号中选择预定波长光信号的多个波长选择器，多个第一光检测器， 每个用于检测由波长选择器选择的相应一个通道的预定波长光信号的功率; 以及信号处理器，用于从数字值测量每个信道的WDM光信号的每个信道的功率，总ASE噪声功率和每个信道的光信噪比。

公开(公告)号：US20120020676A1

公开(公告)日：2012-01-26

申请号：US12912870

申请日：2010-10-27

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

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

IPC分类号： H04B10/06

CPC分类号： H04B10/677

摘要： 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.

摘要翻译： 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：US07676155B2

公开(公告)日：2010-03-09

申请号：US11633170

申请日：2006-12-04

申请人： Yun-Hee Cho ,  Kwang-Joon Kim

发明人： Yun-Hee Cho ,  Kwang-Joon Kim

IPC分类号： H04J14/00

CPC分类号： H04J14/0227 ,  H04J14/0212 ,  H04J14/0241 ,  H04J14/0284

摘要： In a wavelength allocation method in a wavelength division multiplexing network, a 3R wavelength converter having a limited wavelength conversion range is disposed according to a wavelength conversion band of each node, at least one path set between transmitting/receiving nodes is selected, routing paths corresponding to the number of the selected at least one path set between the transmitting/receiving nodes having a request for a new optical path generation are extracted, it is determined whether there is a wavelength consecutive segment set that satisfies a maximum transmission distance for guaranteeing transmission quality of an optical signal and that includes one consecutive wavelength among the extracted routing paths, and a path using a first-fit wavelength is selected from paths of each wavelength consecutive segment and the wavelength is allocated when determining that there is a wavelength consecutive segment set.

摘要翻译： 在波分复用网络中的波长分配方法中，根据每个节点的波长转换带布置具有有限波长转换范围的3R波长转换器，选择发送/接收节点之间设置的至少一个路径，对应的路由路径 提取具有对新的光路生成的请求的发送/接收节点之间的所选择的至少一个路径集合的数量，确定是否存在满足用于保证传输质量的最大传输距离的波长连续段集合 并且在所提取的路由路径中包括一个连续波长，并且从每个波长连续片段的路径中选择使用第一拟合波长的路径，并且当确定存在波长连续片段集时分配波长。

公开(公告)号：US5751468A

公开(公告)日：1998-05-12

申请号：US717127

申请日：1996-09-20

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

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

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

CPC分类号： B82Y20/00 ,  G02F1/017 ,  G02F2201/346

摘要： 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.

摘要翻译： 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：US08681885B2

公开(公告)日：2014-03-25

申请号：US12872506

申请日：2010-08-31

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： H04K1/10

CPC分类号： H04L27/2647 ,  H04L27/0014 ,  H04L27/2657 ,  H04L27/364

摘要： 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.

摘要翻译： 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：US08116623B2

公开(公告)日：2012-02-14

申请号：US12127493

申请日：2008-05-27

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： H04B10/00

CPC分类号： H04J14/0283 ,  H04J14/0204 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0286 ,  H04J14/0294 ,  H04J14/0295 ,  H04Q2011/0081 ,  H04Q2011/0092

摘要： Provided is a multi-ring network operating method of cross-connecting at least two ring networks, the method including connecting an input working ring and an input protection ring of a ring network to an output working ring and an output protection ring of another ring network and then performing cross-connection between the same or different ring networks by using a multi-dimensional cross-connect apparatus. In the multi-ring operating method, a plurality of ring networks can be connected regardless of the protection method used by the ring networks, and the original protection method of each ring network can remain after they are connected.

摘要翻译： 提供一种交换连接至少两个环网的多环网操作方法，该方法包括将环网的输入工作环和输入保护环连接到另一环网的输出工作环和输出保护环 然后通过使用多维交叉连接装置在相同或不同的环形网络之间执行交叉连接。 在多环操作方法中，无论环网使用的保护方式如何，都可以连接多个环网，每个环网的原始保护方法可以在连接后保留。

公开(公告)号：US6060704A

公开(公告)日：2000-05-09

申请号：US842870

申请日：1997-04-17

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

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

IPC分类号： H01L31/0352 ,  H01L27/14

CPC分类号： B82Y20/00 ,  H01L31/035236

摘要： For a multiple transmission communication system, how to individually isolate the transmitted lights and then to distribute to the terminals has been primary concerns to be solved. In the photodetector structure, an absorption layer may be configured as either multiple quantum well structures corresponding to operational wavelengths, or filter-based structure, allowing to select wavelengths in a 1:2:4:8 ratio as an absorptance for each wavelength. In case of using such four-fold lights, the determination as to which wavelength among four-fold wavelengths can be made based upon the total amounts of the current flow in such a photodetector. The photodetector employing such schemes is provided from the present invention.

摘要翻译： 对于多传输通信系统，如何单独隔离发射的光，然后分发到终端，这是首要考虑的问题。 在光检测器结构中，吸收层可以被配置为对应于操作波长的多个量子阱结构或基于滤波器的结构，允许以1:2:4:8的比率选择波长作为每个波长的吸收率。 在使用这种四重光的情况下，可以基于这种光电检测器中的电流的总量来确定四倍波长中的哪个波长。 采用这种方案的光电探测器由本发明提供。

公开(公告)号：US5770851A

公开(公告)日：1998-06-23

申请号：US713535

申请日：1996-09-13

申请人： Hyo-Hoon Park ,  Kwang-Joon Kim ,  Kyung-Sook Hyun ,  O-Kyun Kwon ,  Seok-Ho Song ,  Byueng-Su Yoo ,  Hye-Yong Chu

发明人： Hyo-Hoon Park ,  Kwang-Joon Kim ,  Kyung-Sook Hyun ,  O-Kyun Kwon ,  Seok-Ho Song ,  Byueng-Su Yoo ,  Hye-Yong Chu

IPC分类号： G02B6/43 ,  G02F3/02 ,  H01J40/14

CPC分类号： G02F3/028 ,  G02B6/43

摘要： An improved parallel optical logic operator provides a path for light to pass through substrates in which a light source and an optical logic device are arranged. An optical logic device operates by transmission of light forwarded to a predetermined direction. This increases integration efficiency of the system by eliminating optical parts for changing the light path. A unit chip includes a laser array for generating a predetermined light in accordance with an electrical signal for a logic process, a laser array substrate on which via holes are formed for passing light, a microlens array for converting the light beam emitted from each laser device of the laser array into a parallel light beam for passing through the via hole, and an optical logic circuit array formed with a combination of an S-SEED which performs a logic function by transmission of the light signal through an optical window in S-SEED. A plurality of unit chips are laminated so that the light emitted from the laser device of one of the unit chips passes through an optical logic circuit of a corresponding unit chip and can be made incident on the optical logic circuit in the next unit chip through a via hole.

摘要翻译： 改进的并行光逻辑运算器提供光通过其中布置光源和光逻辑器件的衬底的路径。 光逻辑器件通过传输转发到预定方向的光来操作。 这通过消除用于改变光路的光学部件来提高系统的集成效率。 单元芯片包括用于根据用于逻辑处理的电信号产生预定光的激光阵列，其上形成有用于通过光的通孔的激光阵列基板，用于转换从每个激光装置发射的光束的微透镜阵列 的激光器阵列的平行光束通过通孔;以及光学逻辑电路阵列，其形成有S-SEED的组合，S-SEED通过S-SEED中的光学窗口传输光信号来执行逻辑功能 。 多个单位芯片被层叠，使得从单个芯片之一的激光装置发射的光通过相应的单元芯片的光学逻辑电路，并且可以通过一个单元芯片入射到下一个单元芯片中的光学逻辑电路上 通孔。