公开(公告)号：US20050141894A1

公开(公告)日：2005-06-30

申请号：US10860717

申请日：2004-06-03

申请人： Sung-Kee Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Sung-Bum Park

发明人： Sung-Kee Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Sung-Bum Park

IPC分类号： H04B10/03 ,  H04B10/00 ,  H04B10/038 ,  H04B10/07 ,  H04B10/079 ,  H04B10/2507 ,  H04B10/275 ,  H04B10/29 ,  H04J14/02

CPC分类号： H04J14/0227 ,  H04J14/0208 ,  H04J14/0216 ,  H04J14/0241 ,  H04J14/0283

摘要： A bi-directional add/drop node employed in a bi-directional path-switching network linked by an optical fiber in a loop form is disclosed. The bi-directional add/drop node has a first terminal point and a second terminal point for receiving channels over the optical fiber such that odd channels are inputted through the first terminal point are outputted through the second terminal point and even channels are inputted through the second terminal point are outputted through the first terminal point. The bi-directional add/drop node comprises, a circulation section for circulating the even and odd channels in a predetermined direction, a first input-output section located between the circulation section and the first terminal point wherein the first input-output section outputs the odd channels inputted from the first terminal point to the circulation section through a first input line and outputs the even channels inputted from the circulation section to the first terminal point through a first output line, and a second input-output section positioned between the circulation section and the second terminal point, wherein the second input-output section outputs the even channels inputted from the second terminal point to the circulation section through a second input line and outputs the odd channels inputted from the circulation section to the second terminal point through a second output line.

摘要翻译： 公开了一种在由光纤以环形形式链接的双向路径交换网络中采用的双向加/减节点。 双向分插节点具有用于在光纤上接收信道的第一终端点和第二终端点，使得通过第一终端点输入奇数信道，并通过第二终端点输入偶数信道 第二终点通过第一终点输出。 双向分插节点包括：循环部分，用于沿预定方向循环偶数和奇数通道;第一输入 - 输出部分，位于循环部分和第一终点之间，其中第一输入 - 输出部分输出 通过第一输入线从第一终端点输入到循环部的奇数通道，并且通过第一输出线将从循环部输入的偶数通道输出到第一终点;以及位于循环部之间的第二输入输出部 和第二终点，其中第二输入 - 输出部分通过第二输入线将从第二终端点输入的偶数通道输出到循环部分，并且通过第二输出部分将从循环部分输入的奇数通道输出到第二终点 输出线。

公开(公告)号：US06894830B2

公开(公告)日：2005-05-17

申请号：US10054322

申请日：2002-01-22

申请人： Chang-Hee Lee ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Hyun Deok Kim ,  Jeong-Hun Shin ,  Yunhee Cho

发明人： Chang-Hee Lee ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Hyun Deok Kim ,  Jeong-Hun Shin ,  Yunhee Cho

IPC分类号： H01S3/10 ,  G02B6/42 ,  H01S3/30 ,  H01S5/50 ,  H04B10/00 ,  H04B10/2525 ,  H04B10/29 ,  H04B10/294 ,  H04B10/297 ,  H04J14/00 ,  H04J14/02 ,  G02F1/35 ,  H04B10/16

CPC分类号： H04B10/297

摘要： Disclosed is a bi-directional optical-amplifier module including first through fourth optical amplifiers, a mid-stage device for performing a desired signal processing for an upward or downward optical signal passing therethrough, a first optical-signal-path-setting device for supplying an optical signal inputted to a first input/output terminal of the bi-directional optical-amplifier module while outputting an optical signal outputted from the fourth optical amplifier to the first input/output terminal, a second optical-signal-path-setting device for supplying an optical signal inputted to a second input/output terminal of the bi-directional optical-amplifier module while outputting an optical signal outputted from the third optical amplifier to the second input/output terminal, a third optical-signal-path-setting device for outputting an optical signal outputted from the first optical amplifier to a first input/output terminal of the mid-stage device while supplying an optical signal outputted from the first input/output terminal of the mid-stage device to the fourth optical amplifier, and a fourth optical-signal-path-setting device for outputting an optical signal outputted from the second optical amplifier to a second input/output terminal of the mid-stage device while supplying an optical signal outputted from the second input/output terminal of the mid-stage device to the third optical amplifier.

摘要翻译： 公开了一种双向光放大器模块，包括第一到第四光放大器，用于对通过其的向上或向下的光信号执行期望的信号处理的中级装置，用于供应的第一光信号路径设置装置 输出到所述双向光放大器模块的第一输入/输出端的光信号，同时将从所述第四光放大器输出的光信号输出到所述第一输入/输出端;第二光信号路径设置装置， 提供输入到双向光放大器模块的第二输入/输出端的光信号，同时将从第三光放大器输出的光信号输出到第二输入/输出端;第三光信号路径设定装置 用于在提供光信号的同时将从第一光放大器输出的光信号输出到中级装置的第一输入/输出端 从中段装置的第一输入/输出端子输出到第四光放大器;以及第四光信号路径设置装置，用于将从第二光放大器输出的光信号输出到第二输入/输出端 中间级装置，同时将从中级装置的第二输入/输出端子输出的光信号提供给第三光放大器。

公开(公告)号：US20050088724A1

公开(公告)日：2005-04-28

申请号：US10847109

申请日：2004-05-17

申请人： Jeong-Seok Lee ,  Ho-In Kim ,  In-Kuk Yun ,  Seung-Woo Kim ,  Hyun-Cheol Shin ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Jeong-Seok Lee ,  Ho-In Kim ,  In-Kuk Yun ,  Seung-Woo Kim ,  Hyun-Cheol Shin ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H01S5/50 ,  G02B6/28 ,  H01S3/00 ,  H01S3/23 ,  H01S5/00 ,  H04B10/2507 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04B10/506 ,  H01S3/2333 ,  H01S3/2383 ,  H01S5/005 ,  H01S5/5072 ,  H01S2301/02

摘要： Disclosed are optical signal transmission apparatus including a reflective gain-clamped semiconductor optical amplifier and optical communication system using the optical signal transmission apparatus, which can improve modulation speed and optical power by effectively suppressing intensity noise of an incoherent light source. The optical signal transmission apparatus comprises a light source; a reflective gain-clamped semiconductor optical amplifier to generate gain-clamped optical signals having a substantially constant output intensity in a gain saturation region; a wavelength division multiplexing apparatus configured to spectrum-slice light from the light source, provide the spectrum-sliced light to the reflective gain-clamped semiconductor optical amplifier, and multiplex optical signals gain-clamped by the reflective gain-clamped optical amplifier. and a circulator for inputting the light generated by the light source to the wavelength division multiplexing apparatus, and outputting the optical signal multiplexed by the wavelength division multiplexing apparatus to a transmission link.

摘要翻译： 公开了包括使用光信号传输装置的反射增益钳位半导体光放大器和光通信系统的光信号传输装置，其可以通过有效地抑制非相干光源的强度噪声来提高调制速度和光功率。 光信号传输装置包括光源; 反射增益钳位半导体光放大器，用于产生在增益饱和区中具有基本上恒定的输出强度的增益钳位光信号; 波分多路复用装置，被配置为对来自光源的光进行光谱分片，将光谱切片光提供给反射增益钳位半导体光放大器，并且复用由反射增益钳位光放大器增益钳位的光信号。 以及循环器，用于将由光源产生的光输入到波分复用装置，并将由波分多路复用装置复用的光信号输出到传输链路。

公开(公告)号：US20050074240A1

公开(公告)日：2005-04-07

申请号：US10778426

申请日：2004-02-13

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： H04B10/24 ,  H04B10/207 ,  H04J14/02 ,  H04J14/00

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

摘要： An economical wavelength-division-multiplexed passive optical network (WDM-PON) system is realized by directly modulating a wavelength-seeded light source to transmit upstream or downstream data, without using an expensive external modulator. A multiplexed signal having the same wavelength as the waveguide grating is generated and used to control the temperature of the waveguide grating and adjust the wavelength of a wavelength-division-multiplexed signal routed to a transfer link. The wavelength selectivity and stabilization of each light source are not required. Since upstream and downstream signals can be multiplexed and demultiplexed concurrently by each waveguide grating located in the central office and the remote node, it is possible to reduce the number of waveguide gratings used in a WDM optical network. In addition, upstream and downstream signals can be transmitted concurrently using a single-strand transfer optical fiber, thereby realizing an economical and efficient WDM-PON.

摘要翻译： 通过直接调制波长种子光源来传输上游或下游数据，实现了经济的波分复用无源光网络（WDM-PON）系统，而不需要昂贵的外部调制器。 产生具有与波导光栅相同波长的多路复用信号，并用于控制波导光栅的温度并调节路由到传输链路的波分复用信号的波长。 不需要每个光源的波长选择性和稳定性。 由于可以通过位于中心局和远程节点中的每个波导光栅同时复用和解复用上游和下行信号，所以可以减少在WDM光网络中使用的波导光栅的数量。 此外，可以使用单股传输光纤同时传输上行和下行信号，从而实现经济高效的WDM-PON。

公开(公告)号：US20050041971A1

公开(公告)日：2005-02-24

申请号：US10792322

申请日：2004-03-03

申请人： Jea-Hyuck Lee ,  Jeong-Seok Lee ,  Seong-Taek Hwang ,  Yun-Je Oh

发明人： Jea-Hyuck Lee ,  Jeong-Seok Lee ,  Seong-Taek Hwang ,  Yun-Je Oh

IPC分类号： H01S3/10 ,  H04B10/2507 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04B10/296 ,  H04B10/2503 ,  H04J14/02

摘要： A multi-wavelength optical transmitter which multiplexes a plurality of channels having different wavelengths into an optical signal for output includes lasers for generating mode-locked channels by corresponding incoherent light received in the lasers. The transmitter also has a semiconductor optical amplifier for amplifying, while in a gain saturation state, the optical signal multiplexed by the multiplexer/demultiplexer. Light from a broadband light source is directed by a circulator to the multiplexer/demultiplexer for demultiplexing among the lasers. Light back from the lasers is multiplexed and then directed by the circulator and amplified by a semiconductor optical amplifier for output external to the transmitter.

摘要翻译： 将具有不同波长的多个信道多路复用到用于输出的光信号中的多波长光发射机包括用于通过在激光器中接收的相应非相干光产生锁模信道的激光器。 发射机还具有半导体光放大器，用于在增益饱和状态下放大由多路复用器/解复用器多路复用的光信号。 来自宽带光源的光由循环器引导到多路复用器/解复用器，用于激光器之间的解复用。 来自激光器的光反射被多路复用，然后由循环器引导并由半导体光放大器放大，以便在发射机外部输出。

公开(公告)号：US20050025484A1

公开(公告)日：2005-02-03

申请号：US10781006

申请日：2004-02-18

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 ,  H04B10/27 ,  H04B10/272 ,  H04B10/54 ,  H04B10/572 ,  H04J14/02

CPC分类号： H04B10/2587 ,  H04J14/02 ,  H04J14/0226 ,  H04J14/0232 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J2014/0253

摘要： A wavelength-division-multiplexed passive optical network using an economical multi-wavelength lasing source and a reflective optical amplification device is disclosed. The wavelength-division-multiplexed passive optical network includes a central office in which a multi-wavelength lasing source is located; a plurality of subscriber terminals for transmitting an upward signal by a refection signal of a multi-wavelength signal transmitted from the central office; and a local office, which is connected among the central office and the subscriber terminals through transmission optical fibers, for demultiplexing the multi-wavelength signal transmitted from the central office and transmitting the demultiplexed signal to the subscriber terminals, and for multiplexing signals inputted from each of the subscriber terminals and transmitting the multiplexed signals to the central office.

摘要翻译： 公开了一种使用经济的多波长激光源和反射光放大装置的波分复用无源光网络。 波分复用无源光网络包括多波长激光源所在的中心局; 多个用户终端，用于通过从中心局发送的多波长信号的反射信号发送上行信号; 以及通过发送光纤连接在中心局和用户终端之间的本地办公室，用于对从中心局发送的多波长信号进行解复用，并将解复用的信号发送到用户终端，并且用于复用从每个 并将复用的信号发送到中心局。

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。