公开(公告)号：US07471896B2

公开(公告)日：2008-12-30

申请号：US10903053

申请日：2004-07-30

申请人： Yun Hee Cho ,  Joon Ki Lee ,  Seung Il Myong ,  Jyung Chan Lee ,  Kwangjoon Kim

发明人： Yun Hee Cho ,  Joon Ki Lee ,  Seung Il Myong ,  Jyung Chan Lee ,  Kwangjoon Kim

IPC分类号： H04B10/08

CPC分类号： H04B10/00

摘要： Provided are an optical transponder that processes a G.709 frame that includes an overhead for operation, administration, and maintenance of an optical channel and an overhead for forward error correction, and a method of detecting and treating errors in optical-channel sublayers of the same. The method includes detecting an error signal or a maintenance signal from a G.709 frame that includes an overhead for operation, administration, and maintenance of an optical channel and an overhead for forward error correction; treating errors in a predetermined layer of a plurality of layers that requires error treatment when the error signal or the maintenance signal is detected or canceled; and investigating a reason for the errors in the predetermined layer.

摘要翻译： 提供了一种处理包括用于光信道的操作，管理和维护以及用于前向纠错的开销的开销的G.709帧的光学应答器，以及用于检测和处理光信道子层中的错误的方法 相同。 该方法包括检测来自G.709帧的误差信号或维护信号，该G.709帧包括用于操作，管理和维护光信道的开销和用于前向纠错的开销; 当检测或取消误差信号或维护信号时，处理需要错误处理的多个层的预定层中的错误; 并调查预定层错误的原因。

公开(公告)号：US07313333B2

公开(公告)日：2007-12-25

申请号：US10815064

申请日：2004-03-31

申请人： Jyung Chan Lee ,  Seung Il Myong ,  Joon Ki Lee ,  Kwang Joon Kim

发明人： Jyung Chan Lee ,  Seung Il Myong ,  Joon Ki Lee ,  Kwang Joon Kim

IPC分类号： H04B10/06

CPC分类号： H04B10/695

摘要： Disclosed herein is an apparatus for controlling a decision threshold voltage to an optical receiver, which is capable of automatically controlling the decision threshold voltage to the optical receiver appropriately to signal level decision on the basis of a low-frequency band signal component of an output signal from the optical receiver. The apparatus is adapted to control the level of the decision threshold voltage to the optical receiver, which converts an input optical signal into an electrical signal. To this end, the apparatus comprises a voltage detector for branching off part of the output signal from the optical receiver and detecting a corresponding voltage, a differential comparator for comparing the voltage detected by the voltage detector with a reference voltage inputted thereto and outputting the resulting differential voltage, a low pass filter for filtering the differential voltage from the differential comparator at a predetermined low frequency band and supplying the resulting voltage as the threshold voltage to the optical receiver, and a voltage controller for controlling the reference voltage to the differential comparator on the basis of a differential voltage between the threshold voltage from the low pass filter and a predetermined voltage corresponding to a predetermined minimum bit error rate.

摘要翻译： 本文公开了一种用于控制光接收机的判定阈值电压的装置，其能够基于输出信号的低频带信号分量自动控制对光接收器的判定阈值电压以适当地进行信号电平判定 从光接收机。 该装置适于控制光接收器的判定阈值电平的电平，光接收器将输入光信号转换为电信号。 为此，该装置包括用于将来自光接收器的输出信号的一部分分支并检测相应电压的电压检测器，用于将由电压检测器检测到的电压与输入到其的参考电压进行比较的差分比较器， 差分电压，低通滤波器，用于在预定的低频带对差分比较器的差分电压进行滤波，并将得到的电压作为阈值电压提供给光接收器;以及电压控制器，用于控制差分比较器的参考电压 来自低通滤波器的阈值电压与对应于预定最小误码率的预定电压之间的差分电压的基础。

公开(公告)号：US07440700B2

公开(公告)日：2008-10-21

申请号：US11134202

申请日：2005-05-20

申请人： Jyung Chan Lee ,  Joon Ki Lee ,  Hyun Jae Lee ,  Kwangjoon Kim

发明人： Jyung Chan Lee ,  Joon Ki Lee ,  Hyun Jae Lee ,  Kwangjoon Kim

IPC分类号： H04B10/00

CPC分类号： G01M11/00

摘要： Provided is an apparatus for testing the performance of an optical transceiver by referencing various performance clocks provided by an OTU2 signal connection transceiver and an STM-64/OC-192 signal. The apparatus for testing performance of an optical transceiver includes: a transmitter/receiver reference clock selector for selecting one of various transmitter/receiver reference clocks provided by an STM-64/OC-192 connection optical transceiver or an OTN connection optical transceiver; a transmitter test reference clock selection switch for selecting a receiver data synchronous clock provided by the transceivers or the selected transmitter/receiver reference clock as a transmitter test reference clock; and a receiver test reference clock selection switch for selecting a transmitter supervisory clock provided by the transceivers or the selected transmitter/receiver reference clock as a receiver test reference clock.

摘要翻译： 提供了一种用于通过参考由OTU2信号连接收发器和STM-64 / OC-192信号提供的各种性能时钟来测试光收发器的性能的装置。 用于测试光收发器性能的装置包括：用于选择由STM-64 / OC-192连接光收发器或OTN连接光收发器提供的各种发射机/接收机参考时钟之一的发射机/接收机参考时钟选择器; 发射机测试参考时钟选择开关，用于选择由收发器或选定的发射机/接收机参考时钟提供的接收机数据同步时钟作为发射机测试参考时钟; 以及接收机测试参考时钟选择开关，用于选择由收发器或选定的发射机/接收机参考时钟提供的发射机监控时钟作为接收机测试参考时钟。

公开(公告)号：US08014680B2

公开(公告)日：2011-09-06

申请号：US11935191

申请日：2007-11-05

申请人： Joon Ki Lee ,  Jyung Chan Lee ,  Kwangjoon Kim

发明人： Joon Ki Lee ,  Jyung Chan Lee ,  Kwangjoon Kim

IPC分类号： H04B10/00

CPC分类号： H04B10/40 ,  H04L25/03343

摘要： An optical transceiver which can effectively reduce optical output jitter when an error is made during designing and manufacturing of a printed circuit board (PCB), and a method of controlling optical output jitter using the optical transceiver are provided. The optical transceiver includes a transmitter unit including an equalizing (EQ) filter which can reduce jitter of a high speed electric signal; a control circuit which controls the EQ filter; a receiver unit which receives an optical signal; and a micro-controller which controls the transmitter unit and the receiver unit. Further included in the optical transceiver is an active type or passive type EQ filter and, in the case of the active type, the control circuit is used to control the filter, in order to compensate for high-frequency component of a high speed electric signal in the transmitter unit in order to reduce reflection or loss on the PCB, and thus deterministic optical output jitter occurring due to Inter-Symbol Interference (ISI) can be reduced.

摘要翻译： 提供了在印刷电路板（PCB）的设计和制造期间发生错误时有效降低光输出抖动的光收发器，以及使用该光收发器控制光输出抖动的方法。 光收发器包括一个发射单元，它包括均衡（EQ）滤波器，可以减少高速电信号的抖动; 控制EQ滤波器的控制电路; 接收单元，其接收光信号; 以及控制发射机单元和接收机单元的微控制器。 在光收发器中还包括有源型或无源型EQ滤波器，并且在有源类型的情况下，控制电路用于控制滤波器，以便补偿高速电信号的高频分量 在发射机单元中以减少PCB上的反射或损耗，因此可以减少由于符号间干扰（ISI）引起的确定性的光输出抖动。

公开(公告)号：US20090016719A1

公开(公告)日：2009-01-15

申请号：US12171586

申请日：2008-07-11

申请人： Joon Ki Lee ,  Jyung Chan Lee ,  Kwangjoon Kim

发明人： Joon Ki Lee ,  Jyung Chan Lee ,  Kwangjoon Kim

IPC分类号： H04J11/00

CPC分类号： H04J3/0685 ,  H04J3/1611 ,  H04J3/1652

摘要： Provided are an optical transponder that interfaces a multiprotocol signal and a method of interfacing a multiprotocol signal. The optical transponder includes: an optical transceiver, which optical/electrical converts and multiplexes/demultiplexes an input signal; a reception clock generator, which generates a clock on a reception path; a transmission clock generator, which generates a clock on a transmission path; an optical transport hierarchy (OTH) framer, which processes an OTH signal when the input signal is the OTH signal; a synchronous digital hierarchy (SDH)/synchronous optical network (SONET) framer, which processes an SDH/SONET signal or a gigabit Ethernet (GbE) when the input signal is the SDH/SONET signal or the GbE signal; and a controller which controls the optical transceiver, the reception clock generator, the transmission clock generator, the OTH framer, and the SDH/SONET framer according to the type of the input signal. Accordingly, one optical transponder can receive various types of protocol signals, and thus different optical transponders are not separately required according to a type of a connected signal.

摘要翻译： 提供了一种光接收器，其将多协议信号和多协议信号接口的方法相连接。 光转发器包括：光收发器，其对输入信号进行光/电转换和解复用; 接收时钟发生器，其在接收路径上产生时钟; 传输时钟发生器，其在传输路径上产生时钟; 光传输层次（OTH）成帧器，当输入信号为OTH信号时处理OTH信号; 同步数字层级（SDH）/同步光网络（SONET）成帧器，当输入信号是SDH / SONET信号或GbE信号时处理SDH / SONET信号或千兆以太网（GbE）; 以及根据输入信号的类型控制光收发器，接收时钟发生器，传输时钟发生器，OTH成帧器和SDH / SONET成帧器的控制器。 因此，一个光学应答器可以接收各种类型的协议信号，因此根据连接的信号的类型，不需要单独地需要不同的光转发器。

公开(公告)号：US07869478B2

公开(公告)日：2011-01-11

申请号：US11635196

申请日：2006-12-07

申请人： Joon Ki Lee ,  Jyung Chan Lee ,  Kwangjoon Kim

发明人： Joon Ki Lee ,  Jyung Chan Lee ,  Kwangjoon Kim

IPC分类号： H01S5/042 ,  H01S5/068 ,  H01S5/0683

CPC分类号： H01S5/06832 ,  H01S5/0617

摘要： Provided are an apparatus and method for maintaining an constant extinction ratio of a laser diode (LD). The apparatus includes: an automatic power control circuit maintaining the constant optical power of the LD; a correlation deriver deriving correlations between a bias current of the LD and a modulation current to maintain the constant extinction ratio of the LD; and a modulation current control circuit controlling the modulation current to maintain constant the extinction ratio of the LD based on the correlations. The apparatus and method do not use a temperature sensor but derive a relationship between variances of a bias current of the LD and a modulation current according to temperature change, control the modulation current based on the relationship, and maintain the constant extinction ratio of the LD.

摘要翻译： 提供了一种用于维持激光二极管（LD）的恒定消光比的装置和方法。 该装置包括：保持LD的恒定光功率的自动功率控制电路; 导出LD的偏置电流与调制电流之间的相关性的相关性，以维持LD的恒定消光比; 以及调制电流控制电路，其基于相关性控制调制电流以维持LD的消光比。 该装置和方法不使用温度传感器，而是根据温度变化导出LD的偏置电流的方差和调制电流之间的关系，基于该关系控制调制电流，并且保持LD的恒定消光比 。

公开(公告)号：US20100150568A1

公开(公告)日：2010-06-17

申请号：US12538024

申请日：2009-08-07

申请人： Joon Ki Lee ,  Hwan Seok Chung ,  Sae Kyoung Kang ,  Jyung Chan Lee ,  Kwangjoon Kim

发明人： Joon Ki Lee ,  Hwan Seok Chung ,  Sae Kyoung Kang ,  Jyung Chan Lee ,  Kwangjoon Kim

IPC分类号： H04B10/00

CPC分类号： H04B10/677

摘要： An optical transceiver for optimizing transfer characteristic of an optical interferometer and a method of optimizing transfer characteristic of an optical interferometer of an optical transceiver are provided. It is possible to improve the transmission performance of the optical transceiver by optimizing the transfer characteristic of the optical interferometer included in an optical receiver of the optical transceiver which transmits and receives an optical signal in a phase modulation scheme.

摘要翻译： 提供一种用于优化光学干涉仪的传输特性的光收发器和优化光收发器的光干涉仪的传输特性的方法。 通过优化以相位调制方式发送和接收光信号的光收发器的光接收机中包括的光干涉仪的传输特性，可以提高光收发器的传输性能。

公开(公告)号：US07639677B2

公开(公告)日：2009-12-29

申请号：US11152099

申请日：2005-06-15

申请人： Joon Ki Lee ,  Jyung Chan Lee ,  Kwangjoon Kim

发明人： Joon Ki Lee ,  Jyung Chan Lee ,  Kwangjoon Kim

IPC分类号： H04J3/02

CPC分类号： H04J14/02 ,  H04J3/062 ,  H04J3/1617 ,  H04J2203/0094

摘要： Provided is an optical transponder that receives a tributary signal such as a SDH/SONET signal, a GbE (Gigibit Ethernet) signal, and a SAN (Storage Area Network) signal in a WDM (Wavelength Division Multiplexing) transmission system and a SDH (Synchronous Digital Hierarchy)/SONET (Synchronous Optical Network) system, and more particularly, to an optical transponder having a switching function. The optical transponder having a switching function includes: a switch changing a data path of an input tributary signal from a plurality of channels (ports); an STM-64/OC-192 mapper/demapper mapping the tributary signal switched to a different data path by the switch to an STM-64/OC-192 signal or demapping the STM-64/OC-192 signal to the tributary signal; and a transmission delay time compensator compensating for a differential delay caused by a transmission route difference on an optical fiber link when the STM-64/OC-192 signal is demapped to the tributary signal.

摘要翻译： 提供了在WDM（波分复用）​​传输系统和SDH（同步）中接收诸如SDH / SONET信号，GbE（Gigabit Ethernet）信号和SAN（存储区域网络）信号的支路信号的光转发器 数字体系）/ SONET（同步光网络）系统，更具体地，涉及具有切换功能的光转发器。 具有切换功能的光转发器包括：切换多个信道（端口）的输入支路信号的数据路径的开关; 通过切换到STM-64 / OC-192信号或将STM-64 / OC-192信号解映射到支路信号的STM-64 / OC-192映射器/解映射器将通过切换到不同数据路径的支路信号进行映射， 以及传输延迟时间补偿器，当STM-64 / OC-192信号被解映射到支路信号时，补偿由光纤链路上的传输路由差引起的差分延迟。

公开(公告)号：US20110142453A1

公开(公告)日：2011-06-16

申请号：US12951446

申请日：2010-11-22

申请人： Jyung Chan Lee ,  Joon Ki Lee ,  Sae-Kyoung Kang ,  Kwangjoon Kim

发明人： Jyung Chan Lee ,  Joon Ki Lee ,  Sae-Kyoung Kang ,  Kwangjoon Kim

IPC分类号： H04B10/00

CPC分类号： H04B10/40

摘要： An optical transceiver includes: a transmission unit configured to convert a first electrical signal into a first optical signal and transmit the converted first optical signal; a first power supply unit configured to supply power to the transmission unit; and a controller configured to control the first power supply unit, wherein the controller controls an operation of the first power supply unit according to whether or not the first electrical signal is inputted to the transmission unit.

摘要翻译： 光收发器包括：发送单元，被配置为将第一电信号转换为第一光信号并发送经转换的第一光信号; 配置为向所述传输单元供电的第一电源单元; 以及控制器，被配置为控制所述第一电源单元，其中所述控制器根据所述第一电信号是否输入到所述传输单元来控制所述第一电源单元的操作。

公开(公告)号：US20100150575A1

公开(公告)日：2010-06-17

申请号：US12550753

申请日：2009-08-31

申请人： Jyung Chan Lee ,  Joon Ki Lee ,  Kwangjoon Kim

发明人： Jyung Chan Lee ,  Joon Ki Lee ,  Kwangjoon Kim

IPC分类号： H04B10/04

CPC分类号： H04B10/50575 ,  G02F2203/20 ,  G02F2203/21

摘要： An optical transmitter is provided which optimizes DC bias voltage input to an optical modulator employing a duo-binary modulation scheme. The optical transmitter including a signal combiner which converts an electrical signal for optical transmission into a high-speed electrical signal, and an optical modulator which receives and modulates the high-speed electrical signal from the signal combiner further includes a frequency divider to divide frequency of a sinusoidal watchdog clock signal from the signal combiner and to output the divided signal to be added to direct current (DC) bias voltage input to the optical modulator; and a bias voltage modifier to adjust the DC bias voltage by analyzing the modulated electrical signal from the optical modulator. Accordingly, it is possible to conveniently optimize the DC bias voltage with a simple design.

摘要翻译： 提供一种光发射器，其优化输入到采用二进制二进制调制方案的光调制器的DC偏置电压。 包括将光传输用电信号转换为高速电信号的信号组合器的光发送器和从信号组合器接收并调制高速电信号的光调制器还包括分频器， 来自信号组合器的正弦看门狗时钟信号，并输出被分配的信号以加到输入到光调制器的直流（DC）偏置电压; 和偏置电压调节器，通过分析来自光调制器的调制电信号来调节直流偏置电压。 因此，可以以简单的设计方便地优化DC偏置电压。