公开(公告)号：KR100405820B1

公开(公告)日：2003-11-14

申请号：KR1020020011982

申请日：2002-03-06

Applicant: 한국과학기술원

Inventor： 이창희 ,  김성만 ,  백진석 ,  박근열

IPC: G02B6/00

Abstract: PURPOSE: A receiving error rate improving system of a low frequency-added optical signal is provided to lessen the increase of error rate generated due to low frequency modulation effect. CONSTITUTION: According to an optical communication receiver system for improving a receiving error rate of an optical signal using a variable decision threshold signal, a low frequency band extraction unit is connected to the rear of one side of an optical isolator(11) where an optical signal with low frequency modulation is inputted and thus an output optical signal is used as a variable decision threshold signal of a decision circuit(16). And a high frequency signal receiving unit is connected to the rear of another side of the optical isolator and thus the output optical signal is used as a data signal of the decision circuit.

Abstract translation: 目的：提供一种低频附加光信号的接收错误率改善系统，以减少由于低频调制效应而产生的错误率的增加。 本发明公开了一种光通信接收机系统，该光通信接收机系统使用可变判定阈值信号来提高光信号的接收错误率，并将低频带提取单元连接到光隔离器（11）的一侧的后部， 输入具有低频调制的信号，因此输出光信号被用作判定电路（16）的可变判定阈值信号。 并且高频信号接收单元连接到光隔离器的另一侧的后部，因此输出光信号被用作判定电路的数据信号。

公开(公告)号：KR1020020045144A

公开(公告)日：2002-06-19

申请号：KR1020000074462

申请日：2000-12-08

Applicant: 한국과학기술원

Inventor： 이창희 ,  백진석 ,  박근열

IPC: H04B10/2581

CPC classification number: H04B10/2912 ,  H04B10/2941

Abstract: PURPOSE: An automatic power control optical amplifier for a WDM(Wavelength Division Multiplexing) optical transmission system and a control method therefor are provided to obtain an excellent gain flattering characteristic by effectively controlling a local power of an output spectrum using a dynamic gain flattering filter. CONSTITUTION: The first amplifying unit(10) has a pump resource(10a) and a gain medium(10b) for providing a gain to an optical signal and controlling a power necessary for amplification. A dynamic gain flattering filter(22) converts a spectrum of the optical signal into a random type. The second amplifying unit(20) has a pump resource(20a) and a gain medium(20b) for providing a gain to the optical signal and controlling the power necessary for amplification. An optical monitoring unit(24) is tapped to the output of the second amplifying unit(20). A control circuit(18b) generates control signals of the dynamic gain flattering filter(22) and the pump resources(10a,20a) using the optical spectrum obtained from the optical monitoring unit(24).

Abstract translation: 目的：提供一种用于WDM（波分复用）​​光传输系统及其控制方法的自动功率控制光放大器，以通过使用动态增益平坦滤波器有效地控制输出频谱的局部功率来获得优异的增益特性。 构成：第一放大单元（10）具有用于向光信号提供增益并控制放大所需的功率的泵浦资源（10a）和增益介质（10b）。 动态增益滤波器（22）将光信号的频谱转换为随机类型。 第二放大单元（20）具有用于向光信号提供增益并控制放大所需的功率的泵浦资源（20a）和增益介质（20b）。 光监测单元（24）被抽头到第二放大单元（20）的输出端。 使用从光学监视单元（24）获得的光谱，控制电路（18b）产生动态增益滤波器（22）和泵浦资源（10a，20a）的控制信号。