公开(公告)号：US08059963B2

公开(公告)日：2011-11-15

申请号：US12105499

申请日：2008-04-18

申请人： Sang-Ho Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Han-Lim Lee ,  Ki-Uk Song

发明人： Sang-Ho Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Han-Lim Lee ,  Ki-Uk Song

IPC分类号： H04B10/00

CPC分类号： H04B10/25753 ,  H04W4/18 ,  H04W88/04

摘要： A wired relay method for using a remote station and an apparatus thereof for a Radio over Fiber (RoF) wired relay system supporting a Time Division Duplexing (TDD) wireless communication service, which shares an Low-Noise Amplifier (LNA) for both uplink and downlink operations. The remote station includes a block for dividing each of a downlink optical signal carrying service data and an optical signal carrying transmission/reception control information of the RoF wired relay system, which are input from a base station, a gain controller for separating an uplink Radio Frequency (RF) signal input from an antenna or a portion of a downlink RF signal output from a High-Power Amplifier (HPA) and for monitoring the strength of the input and output RF signals in order to control a gain of the LNA. A converter mutually converts an optical signal and an RF signal, an amplifier amplifies the converted RF signal, and an RF signal flow controller automatically controls uplink and downlink transmission paths of the amplified RF signal according to a transmission/reception status of the RoF wired relay system.

摘要翻译： 一种用于使用远程站的有线中继方法及其装置，用于支持时分双工（TDD）无线通信业务的无线电光纤（RoF）有线中继系统，该无线通信业务共享用于上行链路和/或上行链路的低噪声放大器（LNA） 下行操作。 远程站包括：用于分配来自基站输入的携带服务数据的下行链路光信号和携带RoF有线中继系统的发送/接收控制信息的光信号的块，用于分离上行链路无线电的增益控制器 从天线输入的频率（RF）信号或从大功率放大器（HPA）输出的下行链路RF信号的一部分输入，并用于监视输入和输出RF信号的强度，以便控制LNA的增益。 A转换器相互转换光信号和RF信号，放大器放大转换的RF信号，RF信号流控制器根据RoF有线继电器的发送/接收状态自动控制放大的RF信号的上行链路和下行链路传输路径 系统。

公开(公告)号：US08009742B2

公开(公告)日：2011-08-30

申请号：US11900873

申请日：2007-09-12

申请人： Sung-Kee Kim ,  Do-In Choi ,  Yong-Gyoo Kim ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Sung-Kee Kim ,  Do-In Choi ,  Yong-Gyoo Kim ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04N11/02 ,  H04N7/20 ,  H04N7/173 ,  H04N7/16 ,  H04J3/16

CPC分类号： H04L65/607 ,  H04L65/608 ,  H04N21/234318 ,  H04N21/4307 ,  H04N21/64707

摘要： A system and method for retransmitting an Internet protocol packet for terrestrial digital multimedia broadcasting (DMB) service are provided, in which a PES packetizer and an MPEG-2 TS multiplexer are removed; video, audio, and data signals are individually carried by RTP packets; and a receiver extracts object clock reference (OCR) included in a MPEG-4 SL, and synchronizes a system clock and controls buffers by means of the OCR.

摘要翻译： 提供了一种用于重新发送用于地面数字多媒体广播（DMB）业务的因特网协议分组的系统和方法，其中PES分组器和MPEG-2TS多路复用器被去除; 视频，音频和数据信号由RTP包分别承载; 并且接收器提取包含在MPEG-4SL中的对象时钟参考（OCR），并且通过OCR同步系统时钟并控制缓冲器。

公开(公告)号：US07340170B2

公开(公告)日：2008-03-04

申请号：US10939790

申请日：2004-09-13

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

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

IPC分类号： H04J14/00 ,  H04B10/08

CPC分类号： H04J14/0226 ,  H04B10/032 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0291 ,  H04J14/0294

摘要： A wavelength-division multiplexed self-healing passive optical network is capable of detecting cut-off and deterioration of feeder fiber and distribution fiber and restoring a network with a star structure. The network includes a central office, a remote node, and a plurality of subscriber units. Working and protection feeder fibers connect the central office to the remote node. A reflection unit at an end of the remote node connects to the central office for reflecting a monitoring optical signal transmitted from the central office. An output monitor stage at an end of the central office connects to the remote node for detecting the reflected monitoring optical signal and generating a control signal based on the presence of abnormality of the working and protection feeder fibers.

摘要翻译： 波分复用自愈无源光网络能够检测馈线光纤和配线光纤的切断和劣化，并恢复具有星型结构的网络。 网络包括中心局，远程节点和多个用户单元。 工作和保护馈线光纤将中心局连接到远程节点。 远程节点末端的反射单元连接到中心局，用于反映从中心局发送的监控光信号。 中心局端部的输出监控级与远程节点相连，用于检测反射的监控光信号，并根据工作和保护馈线光纤的异常情况生成控制信号。

公开(公告)号：US07269352B2

公开(公告)日：2007-09-11

申请号：US10688568

申请日：2003-10-17

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： H04J14/02

CPC分类号： H04J14/02

摘要： A WDM (Wavelength Division Multiplexing) light source apparatus using a SOA (Semiconductor Optical Amplifier) is disclosed. The WDM light source apparatus includes N SOAs, a 1×N multiplexer/demultiplexer, and a reflective mirror. The N SOAs have one end coated with a substance of a first reflection factor and the other end coated with a substance of a second reflection factor, directly modulate their input signals into optical signals according to a high-speed data signal to be transmitted, and amplify the modulated signal. The 1×N multiplexer/demultiplexer has one end composed of N terminals and the other end composed of one terminal. The N terminals are coupled with the N SOAs. The reflective mirror having a high reflection factor is connected to one terminal of the 1×N multiplexer/demultiplexer to reflect a signal received from the 1×N multiplexer/demultiplexer.

摘要翻译： 公开了使用SOA（半导体光放大器）的WDM（波分复用）​​光源装置。 WDM光源装置包括N个SOA，1×N个多路复用器/解复用器和反射镜。 N个SOAs的一端涂有第一反射因子的物质，另一端涂覆有第二反射因子的物质，根据要传输的高速数据信号将其输入信号直接调制成光信号;以及 放大调制信号。 1xN多路复用器/解复用器的一端由N个终端组成，另一端由一个终端组成。 N个终端与N个SOA相连。 具有高反射因数的反射镜连接到1xN多路复用器/解复用器的一个端子，以反映从1xN多路复用器/解复用器接收的信号。

公开(公告)号：US20070206953A1

公开(公告)日：2007-09-06

申请号：US11701779

申请日：2007-02-02

申请人： Gyu-Woong Lee ,  Chang-Sup Shim ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Gyu-Woong Lee ,  Chang-Sup Shim ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04B10/00

CPC分类号： G02B6/4246 ,  G02B6/29362 ,  G02B6/4249

摘要： A multi-wavelength bidirectional optical transceiver includes a plurality of optical transmitters for generating and outputting forward optical signals, a plurality of optical receivers for performing optoelectric conversion on reverse optical signals, a band splitter for outputting the forward optical signals that are input from the plurality of optical transmitters to outside the multi-wavelength bidirectional optical transceiver and for outputting reverse optical signals that are input from outside the multi-wavelength bidirectional optical transceiver to the plurality of optical receivers, a power splitter on an optical path between the plurality of optical transmitters and the band splitter for power-splitting the forward optical signals that are input from the plurality of optical transmitters and for outputting portions of the forward optical signals to the band splitter, and a plurality of monitors for performing optoelectric conversion on the remaining portions of the forward optical signals that are input from the band splitter.

摘要翻译： 多波长双向光收发器包括用于产生和输出正向光信号的多个光发射机，用于在反光信号上执行光电转换的多个光接收机，用于输出从多个光信号输入的正向光信号的分束器 的光发射机到多波长双向光收发器之外并且用于输出从多波长双向光收发器外部输入到多个光接收器的反向光信号;在多个光发射机之间的光路上的功率分配器 以及分束器，用于对从多个光发射机输入的正向光信号进行功率分配，并将前向光信号的一部分输出到分束器;以及多个监视器，用于对其中的剩余部分进行光电转换 向前 从分束器输入的光信号。

公开(公告)号：US07257330B2

公开(公告)日：2007-08-14

申请号：US10691359

申请日：2003-10-22

申请人： Gyu-Woong Lee ,  Sung-Kee Kim ,  Seong-Taek Hwang ,  Yun-Je Oh

发明人： Gyu-Woong Lee ,  Sung-Kee Kim ,  Seong-Taek Hwang ,  Yun-Je Oh

IPC分类号： H04B10/04 ,  H04B10/12 ,  G02F1/01 ,  G02F1/03

CPC分类号： H04B10/25137 ,  H04B10/505 ,  H04B10/5055 ,  H04B10/5167

摘要： Disclosed is a duobinary optical transmission apparatus using a semiconductor optical amplifier (SOA). The duobinary optical transmission apparatus includes a light source for generating a carrier wave; a duobinary precoder for encoding an input (non return to zero) electric signal; a semiconductor optical amplification unit to amplify the encoded signal from the duobinary precoder, wherein the amplification unit receives an optical amplification gain difference that varies with a bias current combined with the encoded signal; and an optical band pass filter for receiving a phase-modulated optical signal from the semiconductor optical amplification unit, filtering the received optical signal to a prescribed bandwidth, and thereby generates a duobinary optical signal.

摘要翻译： 公开了使用半导体光放大器（SOA）的二元光传输装置。 二元光传输装置包括用于产生载波的光源; 用于对输入（不归零）电信号进行编码的二进制预编码器; 半导体光放大单元，用于放大来自双二进制预编码器的编码信号，其中放大单元接收随着与编码信号组合的偏置电流而变化的光放大增益差; 以及光学带通滤波器，用于从半导体光放大单元接收相位调制的光信号，将接收到的光信号过滤到规定的带宽，从而产生双二进制的光信号。

公开(公告)号：US20070053311A1

公开(公告)日：2007-03-08

申请号：US11514440

申请日：2006-09-01

申请人： Sang-Ho Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Gyu-Woong Lee ,  Hoon Kim ,  Sung-Kee Kim ,  Han-Lim Lee ,  Jae-Hoon Lee ,  Yong-Gyoo Kim ,  Dae-Eun Choi

发明人： Sang-Ho Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Gyu-Woong Lee ,  Hoon Kim ,  Sung-Kee Kim ,  Han-Lim Lee ,  Jae-Hoon Lee ,  Yong-Gyoo Kim ,  Dae-Eun Choi

IPC分类号： H04J3/00

CPC分类号： H04W88/085

摘要： A radio over fiber (ROF) link apparatus capable of a stable TDD wireless service for a time division duplexing (TDD) baseband signal includes a central access platform (CAP) for receiving various kinds of data including the TDD baseband signal from upper layers, multiplexing the data, electro-optically converting the multiplexed data, and transmitting the converted data as downstream data through an optical fiber, and opto-electrically converting upstream data received through the optical fiber, demultiplexing the converted upstream data, and transmitting the demultiplexed upstream data to the respective upper layers, and a remote access unit (RAU) for receiving the downstream data through the optical fiber, opto-electrically converting the received downstream data to the multiplexed data, demultiplexing the multiplexed data, performing a wireless access process of the demultiplexed data, and transmitting the wireless access processed data to a wireless local area network (WLAN) service terminal through an antenna.

摘要翻译： 能够对TDD时基双工（TDD）基带信号进行稳定的TDD无线业务的无线电光纤（ROF）链路装置包括用于从上层接收包括TDD基带信号的各种数据的中央接入平台（CAP） 数据，电光转换多路复用数据，并通过光纤将转换后的数据作为下行数据发送，并对通过光纤接收的上行数据进行光电转换，对转换的上行数据进行解复用，并将解复用的上行数据发送到 各自的上层以及用于通过光纤接收下游数据的远程访问单元（RAU），将接收到的下游数据光电转换为多路复用数据，解复用多路复用数据，执行解复用数据的无线接入处理 ，并将无线接入处理的数据发送到无线局域网（WLAN）服务 e端子通过天线。

公开(公告)号：US07123633B2

公开(公告)日：2006-10-17

申请号：US10691392

申请日：2003-10-22

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

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

IPC分类号： H01S3/098 ,  H04J14/02

CPC分类号： H04J14/02 ,  H01S5/0268 ,  H01S5/0608 ,  H01S5/0654 ,  H01S5/0656 ,  H01S5/4006 ,  H01S5/4087

摘要： A method for maintaining the mode-locked state of a Fabry-Perot (FP) laser and a WDM light source using the same method for use in WDM optical communication are disclosed. The mode-locked state can be maintained irrespective of temperature change, without use of a temperature controller, by spectrum-slicing the incoherent light generated by a light source element and injecting the spectrum-sliced light to the FP laser, then the FP laser amplifies and outputs only a lasing mode coinciding with the wavelength of the injected light, wherein a lasing-mode interval of the FP laser is set to be less than a 3 dB linewidth of the injected light, so that at least one lasing mode exists inside the 3 dB linewidth of the injected light irrespective of changes in external temperature.

摘要翻译： 公开了一种使用与WDM光通信相同的方法来维持法布里 - 珀罗（FP）激光器和WDM光源的锁模状态的方法。 通过对光源元件产生的非相干光进行频谱分片，并将光谱切片光注入到FP激光器中，不管温度变化如何，可以保持模式锁定状态而不使用温度控制器，然后FP激光放大 并且仅输出与注入的光的波长一致的激光模式，其中FP激光器的激光模式间隔被设置为小于注入的光的3dB线宽，使得至少一个激光模式存在于 不管外部温度的变化，注入光线的3dB线宽。

公开(公告)号：US07110170B2

公开(公告)日：2006-09-19

申请号：US10780306

申请日：2004-02-17

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

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

IPC分类号： H01S3/00

CPC分类号： H01S5/50 ,  H01S5/0264 ,  H01S5/0425 ,  H01S5/2004 ,  H01S5/22 ,  H01S5/5072

摘要： A gain-clamped semiconductor optical amplifier having photo detectors which are integrated on a single crystal substrate can detect optical intensities at input/output terminals of the optical amplifier. The semiconductor optical amplifier includes a first conductive semiconductor substrate, a semiconductor optical amplifier formed on the semiconductor substrate so as to have a horizontal-direction lasing structure, and a first and a second photo detector formed respectively at positions of the semiconductor substrate spaced horizontally from an input side and an output side of the semiconductor optical amplifier so as to measure intensities of an input signal and an output signal of the semiconductor optical amplifier.

摘要翻译： 集成在单晶衬底上的具有光电检测器的增益钳位半导体光放大器可以检测光放大器的输入/输出端的光强度。 半导体光放大器包括第一导电半导体衬底，形成在半导体衬底上以便具有水平方向激光结构的半导体光放大器，以及第一和第二光电检测器，分别形成在半导体衬底的水平方向 半导体光放大器的输入侧和输出侧，以测量半导体光放大器的输入信号和输出信号的强度。

公开(公告)号：US07095552B2

公开(公告)日：2006-08-22

申请号：US10271845

申请日：2002-10-15

申请人： Seong-Taek Hwang ,  Byung-Chang Kang ,  Yun-Je Oh

发明人： Seong-Taek Hwang ,  Byung-Chang Kang ,  Yun-Je Oh

IPC分类号： H01S4/00 ,  H04B10/12

CPC分类号： H04B10/2916 ,  H01S3/1608 ,  H01S3/302 ,  H04J14/0221

摘要： A Raman optical-fiber amplifier used in a wavelength-division-multiplexing optical communication system is provided. The inventive amplifier includes an optical transmitter for transmitting wavelength-division-multiplexed optical signals through an optical fiber and an optical receiver for receiving the optical signals through the optical fiber, and further comprises an erbium-doped fiber which Raman-amplifies and outputs optical signals inputted through the first end of the erbium-doped fiber amplifier connected with the optical fiber; a pumping source which outputs pump light with a predetermined wavelength so as to Raman-pump the erbium-doped fiber; and, a wavelength-selective coupler which outputs the pump light to be introduced into the erbium-doped fiber.