公开(公告)号：US20060133805A1

公开(公告)日：2006-06-22

申请号：US11154255

申请日：2005-06-15

申请人： Seung-Hyun Jang ,  Chul-Soo Lee ,  Eui-Suk Jung ,  Byoung Kim

发明人： Seung-Hyun Jang ,  Chul-Soo Lee ,  Eui-Suk Jung ,  Byoung Kim

IPC分类号： H04B10/08

CPC分类号： H04B10/0799

摘要： An apparatus for detecting a light source causing OBI noise in an SCMA optical network. Subcarrier power meters in the apparatus measure powers of subcarrier signals obtained by filtering a multiplexed optical signal transmitted from the subscriber terminals. A OBI power meter measures OBI noise power from an output of an optical receiver that receives the multiplexed optical signal. A noise occurrence determination unit sequentially changes output powers of light sources in the subscriber terminals if the minimum SNR between the subcarrier signal powers and the OBI noise power is less than a reference SNR, and determines that a light source, which causes a change in the OBI noise power in response to the change in the output power of the light source, is an OBI-causing light source.

摘要翻译： 一种用于检测在SCMA光网络中引起OBI噪声的光源的装置。 设备中的副载波功率计测量通过对从用户终端发送的复用光信号进行滤波而获得的子载波信号的功率。 OBI功率计测量来自接收复用光信号的光接收机的输出端的OBI噪声功率。 如果子载波信号功率和OBI噪声功率之间的最小SNR小于参考SN​​R，则噪声发生确定单元顺序地改变用户终端中的光源的输出功率，并且确定导致 响应于光源输出功率变化的OBI噪声功率是引起OBI的光源。

公开(公告)号：US08050554B2

公开(公告)日：2011-11-01

申请号：US11929849

申请日：2007-10-30

申请人： Seung-Hyun Jang ,  Chul-Soo Lee ,  Eui Suk Jung ,  Byoung Whi Kim

发明人： Seung-Hyun Jang ,  Chul-Soo Lee ,  Eui Suk Jung ,  Byoung Whi Kim

IPC分类号： H04B10/08

CPC分类号： H04J14/0226 ,  H04B10/0771 ,  H04B2210/074 ,  H04J14/0227 ,  H04J14/0238 ,  H04J14/0246 ,  H04J14/0282 ,  H04J14/0298

摘要： Provided are a fault localization apparatus based on an optical communication network and a method thereof. In the fault localization apparatus according to the present invention, a downstream light source is used as a monitoring optical signal instead of using an additional monitoring light source and a subcarrier multiplexing (SCM) monitoring pulse signal of a certain frequency band having no interference with a frequency band of a downstream data signal is used and thus a fault position may be detected at low cost.

摘要翻译： 提供一种基于光通信网络的故障定位装置及其方法。 在根据本发明的故障定位装置中，使用下行光源作为监视光信号，而不是使用附加监视光源和不干扰某一频带的某个频带的副载波复用（SCM）监视脉冲信号 使用下行数据信号的频带，因此可以以低成本检测故障位置。

公开(公告)号：US20050069332A1

公开(公告)日：2005-03-31

申请号：US10830763

申请日：2004-04-22

申请人： Seung-Hyun Jang ,  Eui-Suk Jung ,  Byoung-Whi Kim ,  Hyeong-Ho Lee

发明人： Seung-Hyun Jang ,  Eui-Suk Jung ,  Byoung-Whi Kim ,  Hyeong-Ho Lee

IPC分类号： H04B10/06 ,  H04B10/04 ,  H04J14/02

CPC分类号： H04J14/02 ,  H04J14/0298

摘要： An optical communication apparatus using a sub-carrier multiple access includes a laser diode for generating an optical signal with a central frequency, a temperature controller installed at a subscriber side for controlling a temperature of laser diode placed at a transmitting terminal, an optical coupler for coupling the optical signal outputted from the laser diode to an optical fiber and an optical receiver for receiving the optical signal outputted from the optical coupler. The central frequency of the optical signal outputted from the laser diode is changed in response to the change of the temperature controlled by the temperature controller.

摘要翻译： 使用子载波多路访问的光通信装置包括用于产生具有中心频率的光信号的激光二极管，安装在用户侧的温度控制器，用于控制放置在发射端的激光二极管的温度，光耦合器 将从激光二极管输出的光信号耦合到光纤和用于接收从光耦合器输出的光信号的光接收器。 从激光二极管输出的光信号的中心频率响应于由温度控制器控制的温度的变化而改变。

公开(公告)号：US07515830B2

公开(公告)日：2009-04-07

申请号：US10830763

申请日：2004-04-22

申请人： Seung-Hyun Jang ,  Eui-Suk Jung ,  Byoung-Whi Kim ,  Hyeong-Ho Lee

发明人： Seung-Hyun Jang ,  Eui-Suk Jung ,  Byoung-Whi Kim ,  Hyeong-Ho Lee

IPC分类号： H04J14/00 ,  H04J14/02 ,  H04B10/04

CPC分类号： H04J14/02 ,  H04J14/0298

摘要： An optical communication apparatus using a sub-carrier multiple access includes a laser diode for generating an optical signal with a central frequency, a temperature controller installed at a subscriber side for controlling a temperature of laser diode placed at a transmitting terminal, an optical coupler for coupling the optical signal outputted from the laser diode to an optical fiber and an optical receiver for receiving the optical signal outputted from the optical coupler. The central frequency of the optical signal outputted from the laser diode is changed in response to the change of the temperature controlled by the temperature controller.

摘要翻译： 使用子载波多路访问的光通信装置包括用于产生具有中心频率的光信号的激光二极管，安装在用户侧的温度控制器，用于控制放置在发射端的激光二极管的温度，光耦合器 将从激光二极管输出的光信号耦合到光纤和用于接收从光耦合器输出的光信号的光接收器。 从激光二极管输出的光信号的中心频率响应于由温度控制器控制的温度的变化而改变。

公开(公告)号：US07821349B2

公开(公告)日：2010-10-26

申请号：US12193204

申请日：2008-08-18

申请人： Bong-Hyuk Park ,  Seung-Sik Lee ,  Seung-Hyun Jang ,  Sang-Sung Choi

发明人： Bong-Hyuk Park ,  Seung-Sik Lee ,  Seung-Hyun Jang ,  Sang-Sung Choi

IPC分类号： H03B5/12 ,  H03F3/191

CPC分类号： H03F1/223 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03F1/26 ,  H03F3/19 ,  H03F2200/108 ,  H03F2200/372 ,  H03F2200/451

摘要： Provided is a differential cascode voltage-controlled oscillator that can reduce a phase noise by the use of a quality factor enhancement technique with negative conductance and can mitigate a ground-caused noise effect by the use of a cascode connection technique. The differential cascode voltage-controlled oscillator includes an AC signal generator, and first through fourth cascode amplifiers. The AC signal generator generates an AC signal with a certain frequency according to a control voltage. The first cascode amplifier is connected in a cascode configuration, and amplifies the AC signal to output the resulting signal to a first output terminal. The second cascode amplifier is connected in a cascode configuration and connected to the first cascode amplifier in a cross-coupled configuration, to amplify the AC signal to output the resulting signal to a second output terminal. The third cascode amplifier is connected in a cascode configuration to amplify the AC signal to output the resulting signal to the first output terminal. The fourth cascode amplifier is connected in a cascode configuration and connected to the third cascode amplifier in a cross-coupled configuration, to amplify the AC signal to output the resulting signal to the second output terminal. Herein, the first and second cascode amplifiers and the third and fourth cascode amplifiers are symmetrically connected to differentially amplify the AC signal.

摘要翻译： 提供了一种差分共源共栅压控振荡器，其可以通过使用具有负电导的品质因子增强技术来减少相位噪声，并且可以通过使用共源共栅连接技术来减轻地面引起的噪声影响。 差分共源共栅压控振荡器包括AC信号发生器和第一至第四共源共栅放大器。 交流信号发生器根据控制电压产生一定频率的交流信号。 第一共源共栅放大器以共源共极配置连接，并且放大AC信号以将得到的信号输出到第一输出端。 第二级联放大器以共源共栅配置连接并且以交叉耦合配置连接到第一共源共栅放大器，以放大AC信号以将所得到的信号输出到第二输出端子。 第三共源共栅放大器以共源共极配置连接以放大AC信号，以将结果信号输出到第一输出端。 第四共源共栅放大器以共源共极配置连接并以交叉耦合配置连接到第三共源共栅放大器，以放大AC信号以将结果信号输出到第二输出端。 这里，第一和第二共源共栅放大器和第三和第四共源共栅放大器对称地连接以差分放大AC信号。