公开(公告)号：US07030415B2

公开(公告)日：2006-04-18

申请号：US10473049

申请日：2002-03-27

Applicant: Dong-han Lee

Inventor： Dong-han Lee

IPC: H01L27/15

CPC classification number: B82Y20/00 ,  H01S5/3412 ,  H01S5/5009 ,  H04B10/2914

Abstract: The present invention relates to an optical communication, and more particularly, to a wideband wavelength division multiplexing (WDM) optical communication system which can have a broad amplification band while overcoming a polarization dependency and solving a signal leakage between channels. In an optical amplifier module and optical transmission system for a WDM optical communication system using this, the optical amplifier module uses a semiconductor quantum dot optical amplifier as an amplifying means, and thus has a wide amplification bard and has no a polarization dependency of a gain and a signal leakage between channels, and the optical transmision system uses a semiconductor quantum dot optical amplifier module when several optical amplifier modules are connected for use so that a gain automatically becomes flat and automatically becomes fixed even though a channel number and an input signal size become different. Accordingly, the semiconductor quantum dot optical amplifier module of the present invention can be used as a repeater, an amplifier of a metro WDM system, and an amplifying means for the other systems of a WDM type. The optical transmission system using the semiconductor quantum dot optical amplifier module of the present invention can be used in a long-distance transmission system of a WDM type and a WDM network which pass through the optical amplifier module several times.

Abstract translation: 光通信技术领域本发明涉及一种光通信，更具体地说，涉及宽带波分复用（WDM）光通信系统，该系统可以在克服极化依赖性和解决信道之间的信号泄漏的同时具有宽的放大频带。 在使用这种光放大器模块的WDM光通信系统的光放大器模块和光传输系统中，光放大器模块使用半导体量子点光放大器作为放大装置，因此具有宽的放大ard，并且没有增益的偏振依赖性 并且通道之间的信号泄漏，并且当多个光放大器模块连接使用时，光传输系统使用半导体量子点光放大器模块，使得增益自动变得平坦并且即使通道号和输入信号尺寸自动变得固定 变得不一样 因此，本发明的半导体量子点光放大器模块可以用作中继器，城域WDM系统的放大器和用于WDM类型的其他系统的放大装置。 使用本发明的半导体量子点光放大器模块的光传输系统可以用于通过光放大器模块多次的WDM型和WDM网络的长距离传输系统。

公开(公告)号：US08325868B2

公开(公告)日：2012-12-04

申请号：US12608862

申请日：2009-10-29

Applicant: Ji-hoon Bae ,  Gil-young Choi ,  Dong-han Lee ,  Hoon-gee Yang ,  Jong-suk Chae

Inventor： Ji-hoon Bae ,  Gil-young Choi ,  Dong-han Lee ,  Hoon-gee Yang ,  Jong-suk Chae

IPC: H04L7/02

CPC classification number: H04L7/042 ,  G06K19/0723

Abstract: A passive phase jitter modulation (PJM) tag is charged with power in a continuous wave (CW) section. When receiving a command from a reader, the passive PJM tag must recognize the command and determine exactly when to begin demodulating the command. Only then can the passive PJM tag demodulate the command. To this end, a synchronization apparatus for accurately demodulating a signal input to a PJM tag includes a plurality of correlators correlating a received phase jitter-modulated signal with a template of an internal matched filter which is in the same form as at least a portion of a modified frequency modulation (MFM) flag.

Abstract translation: 无源相位抖动调制（PJM）标签在连续波（CW）部分中被供电。 当从读取器接收到命令时，被动PJM标签必须识别该命令并准确地确定何时开始解调该命令。 无源PJM标签只能解调该命令。 为此，用于精确地解调输入到PJM标签的信号的同步装置包括将接收到的相位抖动调制信号与内部匹配滤波器的模板相关联的多个相关器，所述内部匹配滤波器的模板具有与至少一部分 修改的频率调制（MFM）标志。

公开(公告)号：US07260040B2

公开(公告)日：2007-08-21

申请号：US10757501

申请日：2004-01-15

Applicant: Dong-han Lee

Inventor： Dong-han Lee

IPC: G11B5/09 ,  G11B7/00

CPC classification number: G11B27/36 ,  G11B19/12 ,  G11B27/34 ,  G11B2007/0006

Abstract: A method and apparatus to display a status of an optical recording and/or reproducing apparatus. The method includes, determining a type of an optical disc loaded into a tray; transmitting a predetermined signal based on the determination result to a laser emitting diode module comprising at least two laser emitting diodes, which emit different color beams so that the laser emitting diode module emits a color beam based on the determined type of the optical disc.

Abstract translation: 一种用于显示光学记录和/或再现装置的状态的方法和装置。 该方法包括：确定装载到托盘中的光盘的类型; 将基于所述确定结果的预定信号发送到包括至少两个激光发射二极管的激光发射二极管模块，所述激光发射二极管模块发射不同的颜色光束，使得所述激光发射二极管模块基于所确定的所述类型的光盘发射彩色光束。