公开(公告)号：US06735391B2

公开(公告)日：2004-05-11

申请号：US09767701

申请日：2001-01-24

申请人： Chang Hee Lee ,  Hyun Deok Kim ,  Jeong Hun Shin

发明人： Chang Hee Lee ,  Hyun Deok Kim ,  Jeong Hun Shin

IPC分类号： H04B1000

CPC分类号： H04B10/275 ,  H04B10/032 ,  H04B10/077 ,  H04B10/07955 ,  H04B10/27 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0283 ,  H04J14/0291

摘要： The present invention relates to an automatic retrieval method of a wavelength-division multiplexed (WDM) ring network to the normal state after recovery of a failure. More specifically, the present invention relates to an automatic retrieval method of a WDM ring network to the normal state after recovery of a failure by inducing a lasing by making the gain of the closed loop larger than 1 using the fact that the recovered section in the ring network forms a closed loop immediately after the recovery of the failure.

摘要翻译： 本发明涉及在故障恢复之后波分复用（WDM）环网到正常状态的自动检索方法。 更具体地，本发明涉及通过使闭环增益大于1的诱导激光而恢复故障之后的正常状态的WDM环网的自动检索方法，其中使用 环网络在恢复故障后立即形成闭环。

公开(公告)号：US06559984B1

公开(公告)日：2003-05-06

申请号：US09434843

申请日：1999-11-04

申请人： Chang Hee Lee ,  Sang Yung Shin ,  Chu Kwang Uk

发明人： Chang Hee Lee ,  Sang Yung Shin ,  Chu Kwang Uk

IPC分类号： H04B1008

CPC分类号： H04B10/0773 ,  H04B10/0771 ,  H04B2210/075 ,  H04J14/0221 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0276 ,  H04J14/0298 ,  H04Q11/0005 ,  H04Q2011/0049 ,  H04Q2011/0083

摘要： The present invention relates to an optical path monitoring device on the basis of the identification of input ports in optical cross-connect systems. An optical path monitoring apparatus in an optical cross-connect system is provided. The optical cross-connect system in accordance with the present invention includes input ports, wavelength-division demultiplexers, optical switching devices, a control device, optical power regulating devices, wavelength-division multiplexers, and output ports. The optical path monitoring apparatus in accordance with the present invention includes a plurality of pilot tone superimposers, a plurality of optical splitters, and a plurality of pilot tone detectors.

摘要翻译： 本发明涉及光路监测装置，其基于光交叉连接系统中输入端口的识别。 提供了一种光交叉连接系统中的光路监视装置。 根据本发明的光交叉连接系统包括输入端口，波分解复用器，光交换设备，控制设备，光功率调节设备，波分复用器和输出端口。 根据本发明的光路监测装置包括多个导频音叠加器，多个分光器和多个导频音检测器。

公开(公告)号：US06501573B1

公开(公告)日：2002-12-31

申请号：US09309253

申请日：1999-05-10

申请人： Chang Hee Lee ,  Yun Chur Chung ,  Sang Young Shin ,  Jong Nam Lee

发明人： Chang Hee Lee ,  Yun Chur Chung ,  Sang Young Shin ,  Jong Nam Lee

IPC分类号： H04B1008

CPC分类号： H04B10/077 ,  H04B10/07955

摘要： The monitoring of the qualities of the optical signal transmitted from a light amplifying relay and nodes of transmission networks. An object of the present invention is to provide an apparatus and method for correct monitoring the qualities of the optical signal. While conventional methods monitor the qualities of the optical signal solely by the intensity of the optical signal, the present invention provides an apparatus and method for extracting the clock component of data from the optical signal transmitted and measuring the magnitude and then detecting the presence or absence of the signal and the error rate upon receiving the deteriorated signal due to the chromatic dispersion. The present invention comprises the simple measuring apparatus having a optical coupler 1, a signal conversion means 2, a narrow optical detector 3, a super high frequency rectifier 4 and a voltage detector 5. In application of management and maintenance of optical transmission systems using a light amplifier and photoelectric transmission networks, the present invention provides a high reliability in monitoring the qualities of the optical signal.

摘要翻译： 监控从光放大中继和传输网节点传输的光信号的质量。 本发明的目的是提供一种用于正确监视光信号质量的装置和方法。 虽然传统方法仅通过光信号的强度来监视光信号的质量，但是本发明提供了一种从传输的光信号中提取数据的时钟分量并测量幅值，然后检测有无的装置和方法 并且由于色散而在接收到恶化信号时产生错误率。 本发明包括具有光耦合器1，信号转换装置2，窄光检测器3，超高频整流器4和电压检测器5的简单测量装置。在使用光传输系统的光传输系统的管理和维护 光放大器和光电传输网络，本发明在监视光信号的质量方面提供了高可靠性。

公开(公告)号：US06362911B1

公开(公告)日：2002-03-26

申请号：US09211422

申请日：1998-12-15

申请人： Chang Hee Lee ,  Jang Won Park ,  Jong Uk Chae ,  Jong Won Kim

发明人： Chang Hee Lee ,  Jang Won Park ,  Jong Uk Chae ,  Jong Won Kim

IPC分类号： H04J1402

CPC分类号： H04B10/69 ,  H04B10/695

摘要： A burst mode optical receiver using two amplifiers having different bandwidth. The receiver includes an optical coupler separating an input optical signal into two parts and outputting the same, a delay circuit formed of a first optical fiber delaying an optical signal packet outputted through the optical coupler by a half of packet duration and a second optical fiber passing the optical signal packet without delay, and a first pre-amplifier having a high bandwidth for receiving an optical signal from the first optical fiber and amplifying the same and a second pre-amplifier having a low bandwidth for receiving an optical signal from the second optical fiber and amplifying the same, for thereby improving a receiving sensitivity without using a preamble bit.

摘要翻译： 使用具有不同带宽的两个放大器的突发模式光接收机。 接收机包括将输入光信号分成两部分并将其输出的光耦合器，延迟电路由第一光纤形成，第一光纤将通过光耦合器输出的光信号分组延迟了一半的分组持续时间，第二光纤通过 光信号分组无延迟，以及具有高带宽的第一前置放大器，用于接收来自第一光纤的光信号并对其放大，以及具有低带宽的第二前置放大器，用于从第二光纤接收光信号 光纤并对其进行放大，从而在不使用前同步码位的情况下提高接收灵敏度。