公开(公告)号：US20150055955A1

公开(公告)日：2015-02-26

申请号：US14468694

申请日：2014-08-26

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kwang Ok KIM ,  Han Hyub LEE ,  Sang Soo LEE

IPC: H04J14/02 ,  H04L7/00 ,  H04B10/60 ,  H04J14/08

CPC classification number: H04J14/0239

Abstract: The invention presents the channel management technology in a Time and Wavelength Division Multiplexing-Passive Optical network (TWDM-PON). According to an exemplary embodiment, the channel management technology is a wavelength management method for an Optical Network Unit (ONU) having a tunable receiver in the TWDM-PON in which a service is provided through multiple channels, the wavelength management method including: setting a wavelength of the tunable receiver as a first channel to receive a physical synchronization signal from an Optical Line Terminal (OLT); extracting either or both service utilization information and service operator information from the physical synchronization signal; and based on either or both of the service utilization information and the service operator information, determining whether to perform follow-up procedures for activation via the first channel or whether to change the wavelength of the tunable receiver into a second channel.

Abstract translation: 本发明提出了时分波分复用无源光网络（TWDM-PON）中的信道管理技术。 根据示例性实施例，信道管理技术是在TWDM-PON中具有可调谐接收机的光网络单元（ONU）的波长管理方法，其中通过多个信道提供业务，所述波长管理方法包括： 作为从光线路终端（OLT）接收物理同步信号的第一信道的可调谐接收机的波长; 从物理同步信号中提取服务使用信息和服务运营商信息中的一个或两个; 并且基于所述服务利用信息和所述服务运营商信息中的一个或两者，确定是否执行经由所述第一信道的激活的后续过程或者是否将所述可调谐接收机的波长改变为第二信道。

公开(公告)号：US20250007614A1

公开(公告)日：2025-01-02

申请号：US18757716

申请日：2024-06-28

Applicant: Electronics and Telecommunications Research Institute

Inventor： Han Hyub LEE ,  Hwan Seok CHUNG

IPC: H04B10/40 ,  H04B10/25

Abstract: Proposed is an operation method of an optical transceiver. The operation method includes determining a first center wavelength for a downstream optical signal, determining a second center wavelength for an upstream optical signal, allocating the first center wavelength to a downstream optical signal, allocating the second center wavelength to an upstream optical signal, wherein the first center wavelength and the second center wavelength has a separation distance corresponding to a predetermined wavelength spacing therebetween, and separating the downstream optical signal and the upstream optical signal on the basis of the separation distance.

公开(公告)号：US20230144071A1

公开(公告)日：2023-05-11

申请号：US17871176

申请日：2022-07-22

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Han Hyub LEE ,  Hwan Seok CHUNG

IPC: H04B10/508 ,  H04B10/40 ,  H04B10/50 ,  H04B10/69

CPC classification number: H04B10/508 ,  H04B10/40 ,  H04B10/504 ,  H04B10/697

Abstract: Provided is a burst mode optical transmitter capable of preventing an optical signal from being output from a light source during burst mode disable time through an arithmetic circuit configured to remove an idle signal included in a MAC electrical signal by using a MAC electrical signal and a burst mode control signal.

公开(公告)号：US20190305871A1

公开(公告)日：2019-10-03

申请号：US16203665

申请日：2018-11-29

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Han Hyub LEE ,  Hwan Seok CHUNG

IPC: H04J14/02 ,  H04J3/16

Abstract: An optical network unit (ONU) for optical transmission in a burst mode includes an electro-absorption modulated laser (EML) transmitter including a laser diode (LD) and configured to transmit an uplink optical signal through the LD, an electro-absorption modulator (EAM) driver integrated circuit (IC) (EAM driver IC) configured to amplify an uplink data signal and provide the amplified data signal to the EML transmitter, an LD burst-mode driving circuit configured to control an operation of turning on or off the LD based on a burst-enable signal, and a media access control (MAC) configured to transmit the data signal to the EAM driver IC and transmit the burst-enable signal to the LD burst-mode driving circuit.

公开(公告)号：US20160020867A1

公开(公告)日：2016-01-21

申请号：US14804502

申请日：2015-07-21

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Han Hyub LEE ,  Sang Soo LEE

IPC: H04J14/02 ,  H04B10/079 ,  H04Q11/00

CPC classification number: H04J14/0221 ,  H04J14/0282 ,  H04Q11/0005 ,  H04Q11/0067 ,  H04Q2011/0016

Abstract: A burst-mode optical amplification apparatus and method is provided. The burst-mode optical amplification apparatus includes a gain saturation signal generator configured to generate a gain saturation signal for gain stabilization based on an incoming input optical signal; a wavelength multiplexer configured to wavelength multiplex the incoming input optical signal and the gain saturation signal; and an optical amplifier configured to amplify both the wavelength-multiplexed input optical signal and the wavelength-multiplexed gain saturation signal. The apparatus may further include a time delay module configured to synchronize the input optical signal and the gain saturation signal by delaying the transmission time of the input optical signal, taking into consideration the processing time needed by the gain saturation signal generator to generate the gain saturation signal.

Abstract translation: 提供了一种突发模式光放大装置和方法。 突发模式光放大装置包括：增益饱和信号发生器，被配置为基于输入的光信号产生用于增益稳定的增益饱和信号; 波长多路复用器，被配置为对输入的光信号和增益饱和信号进行波长多路复用; 以及光放大器，被配置为放大波分复用输入光信号和波长复用增益饱和信号。 该装置还可以包括时间延迟模块，其被配置为通过延迟输入光信号的传输时间来同步输入光信号和增益饱和度信号，考虑到增益饱和信号发生器产生增益饱和所需的处理时间 信号。

公开(公告)号：US20150365192A1

公开(公告)日：2015-12-17

申请号：US14740629

申请日：2015-06-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kwang Ok KIM ,  Kyeong Hwan DOO ,  Han Hyub LEE ,  Sang Soo LEE

IPC: H04J14/02

CPC classification number: H04J14/0256 ,  H04J14/0272 ,  H04J14/0282 ,  H04Q11/0067 ,  H04Q2011/0064

Abstract: A method of tuning a wavelength of a tunable ONU in a TWDM-PON is provided. The method includes transmitting a wavelength change request message from a source OLT to request the ONU to change a wavelength thereof from a first wavelength to a second wavelength and in response to the wavelength change request message, transmitting a wavelength change response message from the ONU to the source OLT to indicate whether or not the ONU can change a wavelength thereof. The wavelength change request message is ID information for specifying an ONU that is requested to change a wavelength thereof, and the message may comprise one of the following: system ONU ID, channel ONU ID, and individual ONU ID.

Abstract translation: 提供了一种在TWDM-PON中调谐可调谐ONU的波长的方法。 所述方法包括从源OLT发送波长变化请求消息以请求ONU将其波长从第一波长改变为第二波长，并且响应于波长改变请求消息，将来自ONU的波长变化响应消息发送到 源OLT指示ONU是否可以改变其波长。 波长变化请求消息是用于指定被请求改变其波长的ONU的ID信息，并且该消息可以包括以下之一：系统ONU ID，信道ONU ID和各个ONU ID。

公开(公告)号：US20150125153A1

公开(公告)日：2015-05-07

申请号：US14532369

申请日：2014-11-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jie Hyun LEE ,  Han Hyub LEE ,  Eun Gu LEE ,  Kyeong Hwan DOO

IPC: H04B10/572 ,  H04J14/02

CPC classification number: H04B10/0793 ,  H04B10/07957 ,  H04J14/0282

Abstract: A method for measuring a wavelength channel tuning time by using an optical filter that converts a change of an output wavelength of a tunable device into an optical intensity change, and a system thereof. The system for measuring a wavelength channel tuning time includes: an optical filter set configured to convert a wavelength change of an optical tunable device into an optical output intensity change; at least one or more optical electric converters configured to convert the optical output intensity change output by the optical filter set into an electric signal; and a controller configured to generate a wavelength change command applied to the tunable device, so as to calculate a wavelength channel tuning time of the tunable device by using the wavelength change command and the electric signal output by the optical electric converter.

Abstract translation: 一种通过使用将可调谐器件的输出波长的变化转换为光强度变化的滤光器来测量波长通道调谐时间的方法及其系统。 用于测量波长信道调谐时间的系统包括：光滤波器组，被配置为将光可调谐器件的波长变化转换成光输出强度变化; 至少一个或多个光电转换器，被配置为将由所述滤光器组输出的光输出强度变化转换为电信号; 以及控制器，被配置为产生施加到可调谐器件的波长变化指令，以便通过使用波长改变命令和由光学电转换器输出的电信号来计算可调谐器件的波长通道调谐时间。