公开(公告)号：US07050658B2

公开(公告)日：2006-05-23

申请号：US10802862

申请日：2004-03-18

申请人： Yun Chur Chung ,  Jun Haeng Lee ,  Chun Ju Youn

发明人： Yun Chur Chung ,  Jun Haeng Lee ,  Chun Ju Youn

IPC分类号： G02F1/01 ,  G02F1/35 ,  H04J14/06 ,  H04J14/02 ,  H04B10/12 ,  H01S3/00

CPC分类号： H04B10/2572

摘要： A method and apparatus for minimizing system deterioration caused by polarization effects (e.g., a polarization-dependent gain (PDG), a polarization-dependent loss (PDL), and a polarization mode dispersion (PMD)). The apparatus performs a signal modulation process to enable one bit to simultaneously contain two orthogonal polarization components, resulting in a minimum DOP (Degree Of Polarization). If a signal undergoes the PMD, the apparatus converts an NRZ (Non Return to Zero) signal into an RZ (Return to Zero) signal, resulting in minimum inter-symbol interference caused by the PMD. The apparatus can improve a performance of an optical signal during the PMD operation, whereas a conventional PMD compensation technique has been designed to remove system deterioration caused by only the PMD.

摘要翻译： 一种用于最小化由偏振效应（例如偏振相关增益（PDG），偏振相关损耗（PDL）和偏振模色散（PMD））引起的系统劣化的方法和装置。 该装置执行信号调制处理以使一位同时包含两个正交偏振分量，导致最小DOP（极化度）。 如果信号经过PMD，则该装置将NRZ（非归零）信号转换为RZ（归零）信号，导致由PMD引起的最小的符号间干扰。 该装置可以在PMD操作期间改善光信号的性能，而传统的PMD补偿技术已被设计为消除仅由PMD引起的系统劣化。

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。