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：US20050047785A1

公开(公告)日：2005-03-03

申请号：US10818194

申请日：2004-04-05

申请人： Seong-Taek Hwang ,  Dae-Kwang Jung ,  Hoon Kim ,  Yun-Je Oh ,  Chang-Sup Shim

发明人： Seong-Taek Hwang ,  Dae-Kwang Jung ,  Hoon Kim ,  Yun-Je Oh ,  Chang-Sup Shim

IPC分类号： G02B6/42 ,  H04B10/00 ,  H04B10/272 ,  H04J14/00 ,  H04J14/02 ,  H04L12/28 ,  H04L12/44

CPC分类号： H04J14/0282 ,  G02B6/4246 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J2014/0253

摘要： A bi-directional WDM-PON and a method for allocating a wavelength band are disclosed. In the bi-directional WDM-PON, bi-directional transceiver modules are used to transmit optical signals of different wavelengths in the upstream and downstream directions. An L-band and an S-band are used to allocate wavelength bands to the upstream and downstream optical signals so that a wavelength band interval at which the respective wavelength bands of the upstream and downstream optical signals are spaced is set between 50 nm to 150 nm.

摘要翻译： 公开了双向WDM-PON和分配波长带的方法。 在双向WDM-PON中，双向收发模块用于在上行和下行方向传输不同波长的光信号。 使用L波段和S波段将波长带分配给上游和下游光信号，使得上游和下游光信号的相应波长带间隔开的波长带间隔设置在50nm至150nm nm。

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：US20050036787A1

公开(公告)日：2005-02-17

申请号：US10834323

申请日：2004-04-28

申请人： Jeong-Seok Lee ,  Dong-Jae Shin ,  Seong-Taek Hwang

发明人： Jeong-Seok Lee ,  Dong-Jae Shin ,  Seong-Taek Hwang

IPC分类号： H04J14/00 ,  H04B10/00 ,  H04B10/272 ,  H04J14/02 ,  H04Q11/00

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

摘要： A bi-directional WDM communication system of the type having central and local offices, and subscribers is provided. The central office includes downstream Bragg reflector lasers for generating downstream channels of different wavelengths, each channel being wavelength-locked to a corresponding incoherent light beam. The central office multiplexes the downstream channels into a downstream optical signal, demultiplexes an upstream optical signal into upstream channels of different wavelengths, and detects the upstream channels. The local office demultiplexes a downstream optical signal into downstream channels, multiplexes upstream channels of different wavelengths into an upstream optical signal, outputs it to the central office, and demultiplexes a broadband light beam into incoherent light beams of different wavelengths. Each subscriber receives the corresponding downstream channel and incoherent light beam, includes an upstream Bragg reflector laser for generating an upstream channel wavelength-locked to the received incoherent light beam, and outputs the upstream channel to the local office.

摘要翻译： 提供了具有中央和本地办公室以及订户的双向WDM通信系统。 中心局包括用于产生不同波长的下行通道的下游布拉格反射器激光器，每个通道波长锁定到相应的非相干光束。 中心局将下游信道复用为下行光信号，将上行光信号解复用为不同波长的上行信道，并检测上行信道。 本地办公室将下行光信号解复用到下行信道，将不同波长的上行信道复用为上行光信号，将其输出到中心局，并将宽带光束解复用为不同波长的非相干光束。 每个用户接收相应的下游信道和非相干光束，包括用于产生波长锁定到接收的非相干光束的上行信道的上游布拉格反射器激光器，并将上行信道输出到本地局。

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：US06785043B2

公开(公告)日：2004-08-31

申请号：US10236158

申请日：2002-09-06

申请人： Seong-Taek Hwang ,  Kwan-Woong Song ,  Sung-Tae Kim ,  Young-Hoon Joo ,  Sung-Jin Park

发明人： Seong-Taek Hwang ,  Kwan-Woong Song ,  Sung-Tae Kim ,  Young-Hoon Joo ,  Sung-Jin Park

IPC分类号： H01S300

CPC分类号： H01S3/06754 ,  H01S3/0057 ,  H01S3/0064 ,  H01S3/06758 ,  H01S3/094003

摘要： Disclosed is a dispersion-compensated optical-fiber amplifier including a circulator for outputting an optical signal received at a first terminal to a second terminal, while outputting an optical signal received at the second terminal to a third terminal; a first amplifier for amplifying the optical signal from the second terminal and an optical signal reapplied thereto; a dispersion-compensating fiber for compensating for a dispersion occurring in the optical signal received from the first amplifier and an optical signal reapplied thereto; a second amplifier for amplifying the optical signal from the dispersion-compensating fiber and an optical signal reapplied thereto; a splitter installed on the dispersion-compensating fiber and adapted to output to the dispersion-compensating fiber, an optical signal applied thereto and an optical signal reapplied thereto, while outputting a pumping light applied to one end thereof and adapted to pump both the first and second amplifiers to the other end thereof without allowing the pumping light to pass through the dispersion-compensating fiber; and, a reflector for reflecting back an optical signal from the second amplifier, so that the reflected optical signal is reapplied to the second amplifier, the splitter, the first amplifier, and the circulator, in this order.

摘要翻译： 公开了一种色散补偿光纤放大器，包括：循环器，用于将在第一端子处接收的光信号输出到第二端子，同时将在第二端子接收的光信号输出到第三端子; 用于放大来自第二端子的光信号的第一放大器和重新施加到其上的光信号; 用于补偿从第一放大器接收的光信号中出现的色散的色散补偿光纤和重新施加于其上的光信号; 用于放大来自色散补偿光纤的光信号的第二放大器和重新应用于其的光信号; 分散器，其安装在色散补偿光纤上并且适于输出到色散补偿光纤，施加到色散补偿光纤的光信号和重新施加到其上的光信号，同时输出施加到色散补偿光纤的一端的泵浦光，并且适于泵浦第一和 第二放大器到另一端，而不允许泵浦光通过色散补偿光纤; 以及用于反射来自第二放大器的光信号的反射器，使得反射的光信号按照该顺序重新施加到第二放大器，分路器，第一放大器和循环器。

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：US10277729B2

公开(公告)日：2019-04-30

申请号：US13012189

申请日：2011-01-24

申请人： Mu-Sik Kwon ,  Seong-Taek Hwang ,  Sang-Wook Oh ,  Jung-Rim Kim ,  Do-Hyeon Kim

发明人： Mu-Sik Kwon ,  Seong-Taek Hwang ,  Sang-Wook Oh ,  Jung-Rim Kim ,  Do-Hyeon Kim

IPC分类号： H04M1/725

摘要： Provided is an apparatus and method for transmitting and receiving a handwriting animation message. The apparatus for transmitting a handwriting animation message includes an input unit for receiving an input of a handwriting animation message including coordinate information and time information of points being input onto a background image from a user of a transmitting mobile terminal, a controller for controlling merging or synchronization of the background image and the handwriting animation message, and a transmitter for transmitting the merged or synchronized background image and handwriting animation message to a receiving mobile terminal.

公开(公告)号：US09317935B2

公开(公告)日：2016-04-19

申请号：US12903556

申请日：2010-10-13

申请人： Mu-Sik Kwon ,  Sang-Wook Oh ,  Jung-Rim Kim ,  Do-Hyeon Kim ,  Seong-Taek Hwang

发明人： Mu-Sik Kwon ,  Sang-Wook Oh ,  Jung-Rim Kim ,  Do-Hyeon Kim ,  Seong-Taek Hwang

IPC分类号： H04W4/00 ,  G06T9/20 ,  G06F3/0488 ,  G06T9/00 ,  H04L12/58 ,  H04M1/725 ,  H04N1/00

CPC分类号： G06T9/20 ,  G06F3/04883 ,  G06T9/00 ,  H04L51/08 ,  H04M1/72547 ,  H04M1/72552 ,  H04M1/72555 ,  H04M2250/22 ,  H04N1/00307 ,  H04N1/00312 ,  H04N1/00392 ,  H04N1/00411 ,  H04N2201/0013 ,  H04N2201/0046

摘要： A method for transmitting and receiving a handwritten message having time information includes generating one or more codes using handwritten message information which is sequentially input by a user, converting the handwritten message information and the one or more codes into one image and transmitting the converted image, confirming whether a received image includes the one or more codes, and if the received image includes the one or more codes, sequentially reproducing the contents of the handwritten message according to an input order of the contents of the handwritten message by analyzing the one or more codes.

摘要翻译： 用于发送和接收具有时间信息的手写消息的方法包括：使用由用户顺序输入的手写消息信息生成一个或多个代码，将手写消息信息和一个或多个代码转换成一个图像并发送转换后的图像， 确认接收到的图像是否包括一个或多个代码，并且如果接收到的图像包括一个或多个代码，则通过分析一个或多个代码根据手写消息的内容的输入顺序顺序地再现手写消息的内容 代码。

公开(公告)号：US08682166B2

公开(公告)日：2014-03-25

申请号：US11620231

申请日：2007-01-05

申请人： Dae-Kwang Jung ,  Seong-Taek Hwang ,  Jin-Woo Park ,  Sang-Lok Lee ,  Sung-Kuen Lee

发明人： Dae-Kwang Jung ,  Seong-Taek Hwang ,  Jin-Woo Park ,  Sang-Lok Lee ,  Sung-Kuen Lee

IPC分类号： H04J14/02 ,  H04B10/272

CPC分类号： H04J14/0298 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/0282 ,  H04J2014/0253

摘要： Disclosed is a subcarrier multiplexing type optical communication method including the steps of receiving a first optical signal composed of a plurality of subcarrier channels having different frequencies, creating a second optical signal having a wavelength different from a wavelength of a received signal; and detecting the subcarrier channels from a third optical signal obtained by subjecting the first optical signal to wavelength shift by means of the second optical signal.

摘要翻译： 公开了一种副载波复用型光通信方法，包括以下步骤：接收由具有不同频率的多个子载波信道组成的第一光信号，产生具有与接收信号的波长不同的波长的第二光信号; 以及通过借助于所述第二光信号对所述第一光信号进行波长偏移而获得的第三光信号来检测所述子载波信道。