公开(公告)号：KR1020060037573A

公开(公告)日：2006-05-03

申请号：KR1020040086570

申请日：2004-10-28

Applicant: 한국전자통신연구원

Inventor： 김병휘 ,  이우람

IPC: H04B10/035 ,  H04B10/2581

CPC classification number: H04B10/2587 ,  H04J14/02 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J2014/0253

Abstract: Disclosed herein is a loop-back Wavelength Division Multiplexing Passive Optical network (WDM-PON). The loop-back WDM-PON includes a coupler, a terminal receiver, and a reflective semiconductor amplifier. The coupler branches a downstream signal, which is transmitted from a central office, into first and second downstream signals. The terminal receiver receives and converts the first downstream signal into electrical signal and provides the electrical signal to a subscriber. The reflective semiconductor optical amplifier flattens modulated optical power of the second downstream signal input to the RSOA and re-modulating the flattened signal by changing driving current in response to upstream data.

公开(公告)号：KR1020050030749A

公开(公告)日：2005-03-31

申请号：KR1020030066851

申请日：2003-09-26

Applicant: 한국전자통신연구원

Inventor： 이우람 ,  박재동 ,  김병휘 ,  이형호

IPC: H04J14/02

CPC classification number: H04J14/0287 ,  H04J14/0215 ,  H04J2203/0076 ,  H04Q11/0067

Abstract: A passive optical network system of a wavelength division multiplexing method and a method for processing its signal are provided to drastically increase the transmission speed of the upward signal and the system power margin by installing the encoder and the decoder, respectively. A passive optical network system of a wavelength division multiplexing method includes an optical network device(240) to transmit and receive the upward signal and the downward signal. The optical network device(240) is connected to the central base station through the network. The optical network device(240) is provided with an encoder(244) and a modulator(243). The encoder(244) performs the encoding by adding the extra codes for correcting the error to the electrical upward signal. And, the modulator(243) modulates the upward signal encoded from the encoder(244) to the downward transmitted light from the central base station.

Abstract translation: 提供了一种波分复用方法的无源光网络系统及其信号处理方法，通过分别安装编码器和解码器，大大增加了上行信号的传输速度和系统功率余量。 波分复用方法的无源光网络系统包括：发送和接收上行信号和下行信号的光网络装置（240）。 光网络设备（240）通过网络连接到中央基站。 光网络设备（240）设置有编码器（244）和调制器（243）。 编码器（244）通过将用于校正误差的附加代码与电上升信号相加来执行编码。 并且，调制器（243）将从编码器（244）编码的向上信号调制到来自中央基站的向下透射的光。