公开(公告)号：US06580553B2

公开(公告)日：2003-06-17

申请号：US10046355

申请日：2002-01-14

申请人： Chan-Youl Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Jun-Ho Koh

发明人： Chan-Youl Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Jun-Ho Koh

IPC分类号： H01S300

CPC分类号： H01S3/06754 ,  H01S3/10015 ,  H01S3/1301

摘要： An automatic gain control device of an optical fiber amplifier that outputs a compensation signal to control a gain value of the optical fiber amplifier is disclosed. The device includes: a first optical detector for partially converting an input optical signal to the optical fiber amplifier into a first electrical signal; a second optical detector for partially converting an output optical signal from the optical fiber amplifier into a second electrical signal; a first programmable amplifier having a first gain value set based on a first control signal, the first programmable amplifier inputting the first electrical signal and amplifying it at the first gain value to output a first amplified signal; a second programmable amplifier having a second gain value set based on a second control signal, the second programmable amplifier inputting the second electrical signal and amplifying it at the second gain value to output a second amplified signal; a proportional-integral derivative (PID) for outputting the compensation signal, the compensation signal corresponding to the difference between the power level of the first amplified signal and the power level of the second electrical signal; and, a controller for outputting the second control signal to the second programmable amplifier such that it has the second gain value based on a third gain value and for varying the first gain value of the first programmable amplifier until the first electrical signal and second amplified signal become the same in power level, thereby changing the gain value of the optical fiber amplifier to the third gain value.

摘要翻译： 公开了一种输出补偿信号以控制光纤放大器的增益值的光纤放大器的自动增益控制装置。 该装置包括：第一光学检测器，用于将输入光信号部分地转换成光纤放大器为第一电信号; 第二光学检测器，用于将来自光纤放大器的输出光信号部分地转换成第二电信号; 第一可编程放大器，具有基于第一控制信号设定的第一增益值，第一可编程放大器输入第一电信号并以第一增益值放大第一增益值，以输出第一放大信号; 第二可编程放大器，具有基于第二控制信号设定的第二增益值，第二可编程放大器输入第二电信号并以第二增益值放大第二增益值，以输出第二放大信号; 用于输出所述补偿信号的比例积分微分（PID），所述补偿信号对应于所述第一放大信号的功率电平与所述第二电信号的功率电平之差; 以及控制器，用于将第二控制信号输出到第二可编程放大器，使得其具有基于第三增益值的第二增益值，并且用于改变第一可编程放大器的第一增益值，直到第一电信号和第二放大信号 在功率电平上变得相同，从而将光纤放大器的增益值改变为第三增益值。

公开(公告)号：US08320681B2

公开(公告)日：2012-11-27

申请号：US12487378

申请日：2009-06-18

申请人： Hyun-Soo Kim ,  Seong-Taek Hwang ,  Sang-Wook Oh ,  Sang-Ho Kim ,  Yun-Je Oh ,  Hee-Won Jung ,  Sung-Cheol Kim

发明人： Hyun-Soo Kim ,  Seong-Taek Hwang ,  Sang-Wook Oh ,  Sang-Ho Kim ,  Yun-Je Oh ,  Hee-Won Jung ,  Sung-Cheol Kim

IPC分类号： G06K9/62

CPC分类号： G06K9/78 ,  G06K9/2081 ,  G06K9/228 ,  G06K9/325 ,  G06K9/723 ,  G06K2209/01

摘要： Disclosed is a method and an apparatus for recognizing characters using an image. A camera is activated according to a character recognition request and a preview mode is set for displaying an image photographed through the camera in real time. An auto focus of the camera is controlled and an image having a predetermined level of clarity is obtained for character recognition from the images obtained in the preview mode. The image for character recognition is character-recognition-processed so as to extract recognition result data. A final recognition character row is drawn that excludes non-character data from the recognition result data. A first word is combined including at least one character of the final recognition character row and a predetermined maximum number of characters. A dictionary database that stores dictionary information on various languages using the first word is searched, so as to provide the user with the corresponding word.

摘要翻译： 公开了一种使用图像识别字符的方法和装置。 根据字符识别请求激活相机，并且设置用于实时显示通过相机拍摄的图像的预览模式。 控制相机的自动对焦，并且从在预览模式中获得的图像中获得具有预定水平的清晰度的图像以进行字符识别。 用于字符识别的图像被字符识别处理，以便提取识别结果数据。 绘制从识别结果数据排除非字符数据的最终识别字符行。 组合第一个字，包括最终识别字符行的至少一个字符和预定的最大字符数。 搜索使用第一个单词存储各种语言的字典信息的词典数据库，以向用户提供对应的单词。

公开(公告)号：US07450849B2

公开(公告)日：2008-11-11

申请号：US11197176

申请日：2005-08-04

申请人： Sang-Ho Kim ,  Chang-Sup Shim ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Sang-Ho Kim ,  Chang-Sup Shim ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04J14/00

CPC分类号： H04J14/0227 ,  H04B10/071 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282

摘要： A wavelength-division multiplexing passive optical network (WDM-PON) comprising a central office for generating monitor light and multiplexed downstream optical signals to be out and detecting upstream optical signals, the central office including a signal monitoring unit monitoring based on fed-back monitor light if the wavelengths of the upstream optical signals and the wavelengths of the downstream optical signals change, a plurality of subscriber units for detecting corresponding downstream optical signals and generating upstream optical signals, a remote node for reflecting the monitor light to the central office, de-multiplexing multiplexed downstream optical signals so as to output the downstream optical signals to the corresponding subscriber units, and multiplexing the upstream optical signals so as to output the upstream optical signals to the central office, a first optical path for linking the central office to the remote node, and a plurality of second optical paths for linking the remote node to the subscriber units, respectively.

摘要翻译： 一种波分复用无源光网络（WDM-PON），包括用于产生监控光的中心局和多路复用的下行光信号，以便检测上行光信号，该中心局包括基于反馈监视器的信号监控单元 如果上游光信号的波长和下游光信号的波长发生变化，则用于检测相应的下行光信号并产生上行光信号的多个用户单元，用于将监控光反射到中心局的远端节点 复用下行光信号，以将下行光信号输出到对应的用户单元，并复用上行光信号，以将上行光信号输出到中心局;第一光路，用于将中心局连接到 远程节点和用于li的多个第二光路 将远程节点分别分配给用户单元。

公开(公告)号：US07295778B2

公开(公告)日：2007-11-13

申请号：US10713393

申请日：2003-11-14

申请人： Jea-Hyuck Lee ,  Seong-Taek Hwang ,  Yun-Je Oh ,  Dae-Kwang Jung

发明人： Jea-Hyuck Lee ,  Seong-Taek Hwang ,  Yun-Je Oh ,  Dae-Kwang Jung

IPC分类号： H04J14/00

CPC分类号： H04J14/0282 ,  H04B10/2503 ,  H04B10/40 ,  H04J14/02 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04Q11/0067 ,  H04Q2011/0016

摘要： Disclosed is a wavelength division multiplexed passive optical network (WDM PON) system including a central office, a remote Node, and an optical fiber coupled between the central office and the remote node, wherein the central office includes an optical power splitter coupled to the optical fiber, wherein the optical power splitter (1) divides an upstream optical signal from the optical fiber into a plurality of upstream optical signals having substantially similar power and (2) outputs downstream optical signals to the optical fiber, and a plurality of optical transceiver modules to (1) receive the plurality of upstream optical signals, and (2) output the downstream optical signals to the optical power splitter, and wherein at least one of the optical transceiver modules having an optical transmitter including a semiconductor optical amplifier and a reflection-type optical fiber grating located at a predetermined distance from the semiconductor optical amplifier, the optical transmitter transmitting light of a pre-set wavelength resonating between the SOA and reflection-type optical fiber grating; and wherein at least one of the optical transceiver modules having an optical receiver having an optical fiber grating for transmitting light of a predetermined wavelength and an optical detector for detecting light passing through the optical fiber grating.

摘要翻译： 公开了一种波分复用无源光网络（WDM PON）系统，包括中心局，远程节点和耦合在中心局与远程节点之间的光纤，其中中心局包括耦合到光学器件的光功率分配器 光纤，其中所述光功率分配器（1）将来自所述光纤的上行光信号划分成具有基本相似功率的多个上游光信号，以及（2）向所述光纤输出下行光信号，以及多个光收发模块 （1）接收多个上游光信号，以及（2）将下行光信号输出到光功率分配器，并且其中至少一个光收发模块具有光发射机，该光发射机包括半导体光放大器和反射 - 位于与半导体光放大器预定距离的光纤光栅，光发射 传输在SOA和反射型光纤光栅之间谐振的预设波长的光; 并且其中所述光收发器模块中的至少一个具有光接收器，所述光接收器具有用于透射预定波长的光的光纤光栅和用于检测通过所述光纤光栅的光的光学检测器。

公开(公告)号：US07280719B2

公开(公告)日：2007-10-09

申请号：US11143238

申请日：2005-06-02

申请人： Jae-Hoon Lee ,  Sung-Bum Park ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Hyun-Soo Kim

发明人： Jae-Hoon Lee ,  Sung-Bum Park ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Hyun-Soo Kim

IPC分类号： G02B6/28

CPC分类号： H04J14/02 ,  H04B10/296 ,  H04B10/2972

摘要： A wideband optical module includes a downward wideband light source for generating downward light, an upward wideband light source for generating upward light, a first circulator including a first to a third port for outputting multiplexed downward optical signals to the second port and for outputting multiplexed upward optical signals to the first port, a second circulator including a first to a third port for outputting multiplexed upward optical signals to the second port and for outputting multiplexed downward optical signals to the first port, a first optical coupler connected to the third port of the first circulator and the second port of the second circulator for outputting the downward light to the third port of the first circulator, and a second optical coupler connected to the second port of the first circulator and the third port of the second circulator for outputting the upward light to the third port of the second circulator.

摘要翻译： 宽带光模块包括用于产生向下的光的向下宽带光源，用于产生向上光的向上宽带光源，包括第一至第三端口的第一循环器，用于将多路复用的下行光信号输出到第二端口并用于输出多路复用 光信号到第一端口，第二循环器，包括第一至第三端口，用于将多路复用的上行光信号输出到第二端口，并将多路复用的下行光信号输出到第一端口;第一光耦合器，连接到第一端口的第三端口 第一循环器和第二循环器的第二端口，用于将向下的光输出到第一循环器的第三端口;以及第二光耦合器，连接到第一循环器的第二端口和第二循环器的第三端口，用于输出向上 光到第二个循环器的第三个端口。

公开(公告)号：US07254344B2

公开(公告)日：2007-08-07

申请号：US10427284

申请日：2003-05-01

申请人： Jong-Kwon Kim ,  Seong-Taek Hwang ,  Yun-Je Oh

发明人： Jong-Kwon Kim ,  Seong-Taek Hwang ,  Yun-Je Oh

IPC分类号： H04B10/00 ,  H04J14/00

CPC分类号： H04B10/2587 ,  H04J14/0221 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J2014/0253 ,  H04Q11/0067 ,  H04Q2011/0016

摘要： A passive optical network includes a central office and a subscriber-side apparatus connected with the central office through an optical fiber link. The subscriber-side apparatus performs communication with the central office based on wavelength-division-multiplexed optical signals. The central office has a routing section, provided with first to fourth multiplexing ports, for demultiplexing multi-wavelength light inputted from the fourth multiplexing port into a plurality of channels. Each of the demultiplexed channels is amplified and multiplexed for output through the first multiplexing port. Optical signals inputted through the third multiplexing port are demultiplexed and outputted upstream. The routing section also multiplexes channels for downstream optical signals, outputting the multiplexed channels through the second port. A splitting section, provided with first to third splitting ports and arranged on a loop optical waveguide connects the first and fourth multiplexing port with each other. The splitting section causes some of multi-wavelength light inputted into the first splitting port to be outputted through the second splitting port and causes the remainder of multi-wavelength light to be outputted through the third splitting port connected with the fourth multiplexing port. A circulator causes the multi-wavelength light inputted through the second splitting port to be transmitted to the subscriber-side apparatus and causes upstream optical signals received from the subscriber-side apparatus to be outputted to the third multiplexing port.

摘要翻译： 无源光网络包括通过光纤链路与中心局连接的中心局和用户侧设备。 用户侧设备基于波分复用光信号与中心局进行通信。 中心局具有路由部分，设置有第一到第四复用端口，用于将从第四复用端口输入的多波长光解复用为多个信道。 每个解复用的信道被放大和多路复用以通过第一复用端口输出。 通过第三复用端口输入的光信号被解复用并在上游输出。 路由部分还复用用于下行光信号的信道，通过第二端口输出多路复用信道。 具有第一至第三分离端口并布置在环形光波导上的分离部分将第一和第四复用端口彼此连接。 分割部使通过第二分割口输出输入到第一分割端口的一部分多波长光，并且通过与第四复用端口连接的第三分离端口输出剩余的多波长光。 循环器使得通过第二分割端口输入的多波长光被发送到用户侧装置，并且使从用户侧装置接收到的上行光信号输出到第三复用端口。

公开(公告)号：US20070147835A1

公开(公告)日：2007-06-28

申请号：US11606666

申请日：2006-11-30

申请人： Sang-Ho Kim ,  Seong-Taek Hwang ,  Kwan-Soo Lee ,  Yun-Je Oh ,  Jae-Hoon Lee

发明人： Sang-Ho Kim ,  Seong-Taek Hwang ,  Kwan-Soo Lee ,  Yun-Je Oh ,  Jae-Hoon Lee

IPC分类号： H04J14/00

CPC分类号： H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J2014/0253

摘要： A method for controlling optical transmitters in a Wavelength Division Multiplexed (WDM)-Passive Optical Network (PON) system includes the steps of: determining the existence of an upward optical signal to control an optical transmitter provided for each corresponding Optical Node Terminal (ONT) to be turned on/off in an Optical Line Termination (OLT); and monitoring the state of a transmission buffer within an Ethernet switch to control a corresponding optical transmitter to be turned on/off in accordance with the state of the transmission buffer in each of the ONTs.

摘要翻译： 一种用于控制波分复用（WDM）无源光网络（PON）系统中的光发射机的方法包括以下步骤：确定存在向上的光信号以控制为每个对应的光节点终端（ONT）提供的光发射机， 在光线路终端（OLT）中打开/关闭; 以及监视以太网交换机内的发送缓冲器的状态，以根据每个ONT中的发送缓冲器的状态来控制相应的光发送器被接通/断开。

公开(公告)号：US07174104B2

公开(公告)日：2007-02-06

申请号：US10459796

申请日：2003-06-12

申请人： Hong-Seok Shin ,  Seong-Taek Hwang ,  Yun-Je Oh

发明人： Hong-Seok Shin ,  Seong-Taek Hwang ,  Yun-Je Oh

IPC分类号： H04J14/02 ,  H04J14/00

CPC分类号： H04J14/02 ,  H04B10/506

摘要： A transmitting apparatus using a multiple lambda source in WDM network, which has an improved structure to minimize costs and efforts and reduce time delay that may be incurred through wavelength shift. The transmitting apparatus comprises: a multiple lambda source providing a signal with multiple wavelengths, which carries no information; a first optical circulator for transferring the signal with multiple wavelengths carrying no information, which has been transmitted from the multiple lambda sources, to multiplexer/demultiplexer, the first optical circulator transferring a multiplexed signal from the multiplexer/demultiplexer. The multiplexer/demultiplexer demultiplexes the multiple wavelength optical signal from the first optical circulator and for multiplexing optical signals of each wavelength on which information is loaded. An optical space switch for line-distributing demultiplexed signals from the multiplexer/demultiplexer to a channelization module according to each wavelength of the demultiplexed signals, and for transferring optical signals from the channelization module to the multiplexer/demultiplexer; and the channelization module for modulating line distributed optical signals from the optical space switch to generate modulated optical signals, and for transferring the modulated optical signals to the optical space switch.

摘要翻译： 一种在WDM网络中使用多个λ源的发送装置，其具有改进的结构以最小化成本和努力，并减少可能由波长偏移引起的时间延迟。 发送装置包括：多个λ源，其提供具有多个波长的信号，其不携带信息; 第一光循环器，用于将已经从多个λ源发送的信息的多个波长的信号传送到多路复用器/解复用器，第一光环行器从多路复用器/解复用器传送多路复用信号。 多路复用器/解复用器从第一光环行器解复用多波长光信号，并对用于加载信息的每个波长的光信号进行复用。 一种光学空间开关，用于根据解复用的信号的每个波长将从多路复用器/解复用器到信道化模块的解复用信号进行线路分配，并将光信号从信道化模块传送到复用器/解复用器; 以及用于调制来自光学空间开关的线分布式光信号的信道化模块，以产生调制的光信号，并用于将调制的光信号传送到光空间交换机。

公开(公告)号：US07068425B2

公开(公告)日：2006-06-27

申请号：US10648664

申请日：2003-08-26

申请人： Seong-Taek Hwang ,  Kwan-Woong Song ,  Yun-Je Oh

发明人： Seong-Taek Hwang ,  Kwan-Woong Song ,  Yun-Je Oh

IPC分类号： H01S3/00

CPC分类号： H04B10/291 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094023 ,  H01S3/2383

摘要： Disclosed wideband optical fiber amplifier amplifies and outputs wideband optical signal containing C-band and L-band optical signals. The amplifier includes: a first amplification section amplifying the wideband optical signals; a second amplification section amplifying the separated L-band optical signals amplified by the first amplification section; an optical signal coupler combining and outputting the optical signals amplified by the first and second amplification sections; and an optical circulator. A first port of the optical circulator inputs the wideband optical signals from the optical communication network; a second port outputs the inputted wideband optical signals and inputs spontaneous emissions generated from the first amplification section; a third port provides the spontaneous emissions to the second amplification section while inputting the L-band optical signals amplified by the second amplification section; and a fourth port outputs L-band optical signals that were inputted to the third port to the optical signal coupler.

摘要翻译： 公开的宽带光纤放大器放大并输出包含C波段和L波段光信号的宽带光信号。 放大器包括：放大宽带光信号的第一放大部分; 第二放大部分，放大由第一放大部分放大的分离的L波段光信号; 光信号耦合器，组合并输出由第一和第二放大部分放大的光信号; 和光循环器。 光环行器的第一个端口输入来自光通信网络的宽带光信号; 第二端口输出所输入的宽带光信号并输入从第一放大部分产生的自发辐射; 第三端口在输入由第二放大部分放大的L波段光信号的同时，向第二放大部分提供自发辐射; 并且第四端口将输入到第三端口的L波段光信号输出到光信号耦合器。

公开(公告)号：US20050259988A1

公开(公告)日：2005-11-24

申请号：US10988824

申请日：2004-11-15

申请人： Dae-Kwang Jung ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Dae-Kwang Jung ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04J14/00 ,  H04B10/00 ,  H04B10/25 ,  H04B10/272 ,  H04J14/02

CPC分类号： H04J14/02 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282

摘要： A bi-directional optical access network is disclosed. The network includes a central office that generates a plurality of wavelength-locked downstream optical signals, multiplexes the downstream optical signals, and outputs the resultant multiplexed signal. The network also includes a remote node that demultiplexes the multiplexed signal of the downstream optical signals output from the central office, outputs the demultiplexed downstream optical signals to subscriber units, respectively, multiplexes upstream optical signals, and outputs the resultant multiplexed signal of the upstream optical signals to the central office. The subscriber units slice an associated one of the downstream optical signals to detect a portion of the associated downstream optical signal. The subscriber units generate an associated one of the upstream optical signals, which is wavelength-locked by the remaining portion of the associated downstream optical signal, and output the associated upstream optical signal to the remote node.

摘要翻译： 公开了一种双向光接入网络。 网络包括生成多个波长锁定的下行光信号的中心局，多路复用下行光信号，并输出所得到的复用信号。 该网络还包括对从中心局输出的下行光信号的复用信号进行解复用的远程节点，分别向用户单元输出解复用的下行光信号，复用上行光信号，并输出上行光信号的合成复用信号 向中心局发信号。 用户单元切割相关联的一个下行光信号以检测相关联的下行光信号的一部分。 用户单元产生相关联的一个上行光信号，其由相关联的下行光信号的剩余部分波长锁定，并将相关联的上行光信号输出到远程节点。