公开(公告)号：US20100158520A1

公开(公告)日：2010-06-24

申请号：US12604357

申请日：2009-10-22

Applicant: Kyeong-eun Han ,  Kwang-joon Kim

Inventor： Kyeong-eun Han ,  Kwang-joon Kim

IPC: H04J14/02

CPC classification number: H04J14/0238 ,  H04J14/0228 ,  H04J14/0241 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0257 ,  H04J14/0258 ,  H04J14/0267 ,  H04J14/0269 ,  H04J14/0282 ,  H04Q11/0067 ,  H04Q2011/0088

Abstract: Provided are a local area network (LAN) emulation method and an information storage medium. The LAN emulation method provides a LAN emulation function in an arrayed-waveguide grating (AWG)-based wavelength division multiplexing (WDM)-passive optical network (PON) using a mode bit and a logical link identifier (LLID).

Abstract translation: 提供了局域网（LAN）仿真方法和信息存储介质。 LAN仿真方法使用模式位和逻辑链路标识符（LLID）在基于阵列波导光栅（AWG）的波分复用（WDM）无源光网络（PON）中提供LAN仿真功能。

公开(公告)号：US20100092172A1

公开(公告)日：2010-04-15

申请号：US12486642

申请日：2009-06-17

Applicant: Hwan-seok Chung ,  Sun-hyok Chang ,  Sang-soo Lee ,  Kwang-joon Kim

Inventor： Hwan-seok Chung ,  Sun-hyok Chang ,  Sang-soo Lee ,  Kwang-joon Kim

IPC: H04J14/00

CPC classification number: H04Q11/0062 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0217 ,  H04J14/0291 ,  H04J14/0295 ,  H04J14/0297 ,  H04Q2011/0011 ,  H04Q2011/0015 ,  H04Q2011/0081

Abstract: Provided is an optical network in which a wavelength division multiplexing-based optical transmission scheme is implemented. An apparatus for cross-connecting an optical path includes a path switch including a plurality of input terminals receiving optical signals from other nodes, and a plurality of output terminals sending the optical signals to the other nodes, the path switch switching the path of the optical signal so that the optical signal input via one of the input terminals is output to one of the output terminals; and a wavelength converter converting a wavelength of the optical signal input via the input terminal and outputting the wavelength-converted optical signal to the output terminal according to a switching result of the path switch. Thus, inefficient use of a network resource due to wavelength collision can be prevented, the path can be automatically cross-connected and thus quickly established, path switching and branch combination can be performed irrespective of wavelength, and switching can be performed irrespective of direction.

Abstract translation: 提供了实现基于波分复用的光传输方案的光网络。 用于交叉连接光路的装置包括：路径开关，其包括从其他节点接收光信号的多个输入端子，以及将光信号发送到其他节点的多个输出端子，路径开关切换光学路径 信号，使得经由一个输入端子输入的光信号被输出到输出端之一; 以及波长转换器，其经由所述输入端子转换输入的所述光信号的波长，并且根据所述路径切换的切换结果将所述波长转换的光信号输出到所述输出端子。 因此，可以防止由于波长碰撞导致的网络资源的低效使用，路径可以自动交叉连接并因此快速建立，路径切换和分支组合可以与波长无关地执行，并且可以不考虑方向进行切换。

公开(公告)号：US07313333B2

公开(公告)日：2007-12-25

申请号：US10815064

申请日：2004-03-31

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

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

IPC: H04B10/06

CPC classification number: H04B10/695

Abstract: 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.

Abstract translation: 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：US07266309B2

公开(公告)日：2007-09-04

申请号：US10826015

申请日：2004-04-16

Applicant: Youn Seon Jang ,  Kwang Joon Kim ,  Jin Soo Han

Inventor： Youn Seon Jang ,  Kwang Joon Kim ,  Jin Soo Han

IPC: H04B10/04 ,  H04B10/12

CPC classification number: G02F1/0123 ,  G02F1/225

Abstract: The present invention relates to an apparatus and method for stabilizing a bias voltage for a pulse generating modulator, which can automatically detect an optimal bias voltage for an external modulator, which is used in RZ or CSRZ modulation of an optical transmission signal using NRZ data to generate a reference pulse optical signal, and maintain the optimal bias voltage. In the bias voltage stabilizing method of the present invention, an output signal of the external modulator, to which the bias voltage to be stabilized is applied, is detected, a drive clock signal applied to the external modulator is detected, a mean output value of the products obtained by the multiplication of the output signal and the clock signal is periodically examined, and the bias voltage is adjusted so that the mean output value becomes “0”.

Abstract translation: 本发明涉及一种用于稳定脉冲发生调制器的偏置电压的装置和方法，该装置和方法可以自动检测用于外部调制器的最佳偏置电压，其用于使用NRZ数据的光传输信号的RZ或CSRZ调制 产生参考脉冲光信号，并保持最佳偏置电压。 在本发明的偏压稳定化方法中，检测到施加了要稳定的偏置电压的外部调制器的输出信号，检测到施加到外部调制器的驱动时钟信号，平均输出值 周期性地检查通过乘以输出信号和时钟信号而获得的乘积，并调整偏置电压，使得平均输出值变为“0”。

公开(公告)号：US07133196B1

公开(公告)日：2006-11-07

申请号：US11320418

申请日：2005-12-27

Applicant: Won Kyoung Lee ,  Heuk Park ,  Kwang Joon Kim

Inventor： Won Kyoung Lee ,  Heuk Park ,  Kwang Joon Kim

IPC: H01S3/00

CPC classification number: H01S3/10007 ,  H01S3/06754 ,  H01S2301/02 ,  H01S2301/04

Abstract: Provided is an erbium-doped fiber amplifier reducing transient phenomena of a signal-to-noise ratio and a bit error rate in a dynamic wavelength division multiplexing system and an amplifying method using the erbium-doped fiber amplifier. The erbium-doped fiber amplifier includes: a polarization scrambler modulating a polarization state of an input signal to remove a polarization of the input signal; an amplifier amplifying the input signal from which the polarization has been removed; a detector reading powers of input and output signals of the amplifier; and an automatic gain controller controlling currents of the pump LDs according to the powers of the input and output signals read by the detector 1630 to maintain the gain even if the power of input signal changes.

Abstract translation: 提供了一种铒掺杂光纤放大器，其减小动态波分复用系统中的信噪比和误码率的瞬变现象以及使用掺铒光纤放大器的放大方法。 掺铒光纤放大器包括：调制输入信号的偏振状态以消除输入信号的偏振的偏振加扰器; 放大已经去除了极化的输入信号的放大器; 检测器读取放大器的输入和输出信号的功率; 以及自动增益控制器，其根据由检测器1630读取的输入和输出信号的功率来控制泵浦LD的电流，以便即使输入信号的功率改变来维持增益。

公开(公告)号：US06862303B2

公开(公告)日：2005-03-01

申请号：US10196465

申请日：2002-07-15

Applicant: Bong Kyu Kim ,  Kwang Joon Kim ,  Byoung-Sung Kim ,  Hae Geun Kim

Inventor： Bong Kyu Kim ,  Kwang Joon Kim ,  Byoung-Sung Kim ,  Hae Geun Kim

IPC: H01S5/0687 ,  H01S5/40 ,  H04B10/50 ,  H04B10/572 ,  H04J14/02 ,  H01S3/13

CPC classification number: H04B10/572 ,  H01S5/0687 ,  H01S5/4087 ,  H04B10/506 ,  H04J14/02

Abstract: Disclosed is a multiwavelength locking method and apparatus using an acousto-optic tunable filter in an optical communication system including optical transport networks, in which output wavelengths of light sources are monitored under the condition in which pilot signals are applied to the acousto-optic tunable filter, so as to lock the wavelengths of the light sources, thereby eliminating an wavelength instability of the light sources for an improvement in transmission characteristics. The acousto-optic tunable filter receives light beams of N different frequencies respectively outputted from N light sources, along with N pilot signals having different frequencies, and converts respective frequencies of beam components of the output beam corresponding to the N pilot signals, thereby outputting N frequency-converted output beams to be applied to a photo-detector. N electrical signals respectively corresponding to the frequencies of the pilot signals are outputted from the photo-detector, separated from one another while corresponding to the light sources, respectively, and then used to compensate for respective output wavelengths of the light sources, thereby enabling the corresponding light sources to output locked wavelengths, respectively.

Abstract translation: 公开了一种在包括光传输网络的光通信系统中使用声光可调滤波器的多波长锁定方法和装置，其中在将导频信号施加到声光可调谐滤波器的条件下监视光源的输出波长 以便锁定光源的波长，从而消除了光源的波长不稳定性，以提高传输特性。 声光可调谐滤波器接收分别从N个光源输出的N个不同频率的光束以及具有不同频率的N个导频信号，并且转换与N个导频信号对应的输出波束的波束分量的各个频率，从而输出N 频率转换的输出光束被施加到光检测器。 分别对应于导频信号的频率的N个电信号分别从光电检测器输出，分别对应于光源，然后用于补偿光源的各个输出波长，从而使得 相应的光源分别输出锁定波长。

公开(公告)号：US6028301A

公开(公告)日：2000-02-22

申请号：US968250

申请日：1997-11-12

Applicant: Kwang Joon Kim ,  Jong Hyun Lee

Inventor： Kwang Joon Kim ,  Jong Hyun Lee

IPC: G01R31/00 ,  B81B7/00 ,  B81B7/02 ,  H01J40/14

CPC classification number: G09G3/3433

Abstract: The present invention discloses a method for controlling a micro electro-mechanical system manufactured using micro-machining technology and verifying the state thereof and, more particularly, to a method for controlling the micro electro-mechanical system and verifying the state thereof using light so that the voltage applied to each MEMS is determined by the intensity of the light incident on two optical windows of the symmetric SEEDs respectively by attaching the symmetric SEEDs every MEMS to electrically connect one of the SEEDs to the MEMS in parallel, instead of a conventional method in which the voltage from the control circuit is applied directly to the MEMS via wires.

Abstract translation: 本发明公开了一种使用微加工技术制造的微电子机械系统的控制方法，其特征在于，一种用于控制微机电系统的方法，并使用光来验证其状态， 施加到每个MEMS的电压由入射在对称SEED的两个光学窗口上的光的强度分别通过每个MEMS连接对称的SEED而并联，以将ESED中的一个与MEMS平行地连接，而不是常规的方法 来自控制电路的电压通过导线直接施加到MEMS。

公开(公告)号：US08532501B2

公开(公告)日：2013-09-10

申请号：US12912870

申请日：2010-10-27

Applicant: Hwan-Seok Chung ,  Sun-Hyok Chang ,  Jyung-Chan Lee ,  Kwang-Joon Kim

Inventor： Hwan-Seok Chung ,  Sun-Hyok Chang ,  Jyung-Chan Lee ,  Kwang-Joon Kim

IPC: H04B10/06

Abstract: An apparatus for receiving optical signals in DQPSK and method of controlling a phase offset in receiving optical signals for DQPSK is provided. An original optical signal modulated in DQPSK is received. The original optical signal is delayed by one bit to make a delay optical signal such that an interference on the original optical signal and the delay optical signal is performed. A control signal is generated by use of an interference result between the original optical signal and the delay optical signal. A phase offset for the interference between the original optical signal and the delay optical signal is controlled by use of the generated control signal. In receiving optical signals, the phase offset between the delay optical signal and the original optical signal is precisely controlled, thereby optimizing the transfer characteristics of an optical delay interferometer.

公开(公告)号：US20100329112A1

公开(公告)日：2010-12-30

申请号：US12638002

申请日：2009-12-15

Applicant: Kye-hyun AHN ,  Seung-hwan KIM ,  Yong-tae KIM ,  Kyeong-eun HAN ,  Kwang-joon KIM

Inventor： Kye-hyun AHN ,  Seung-hwan KIM ,  Yong-tae KIM ,  Kyeong-eun HAN ,  Kwang-joon KIM

IPC: G06F11/00 ,  H04L12/26

CPC classification number: H04L25/14

Abstract: An Ethernet device having multiple lanes and a method of operating the lanes are provided. In one general aspect, it is possible to allocate a dummy block to each of one or more lanes such that the lanes do not selectively participate in communications. In addition, on a receiving side, the dummy block can be removed from among the genuine data blocks to enable data to be decoded. In this case, an Ethernet device on a transmission side and an Ethernet device on a receiving side can exchange information of a lane to which the dummy block is allocated by use of a lane status message, and the lane status message may be based on a link fault message specified by Ethernet standards.

Abstract translation: 提供了一种具有多个通道的以太网设备和一个操作车道的方法。 在一个一般方面，可以将一个虚拟块分配给一个或多个车道中的每一个，使得车道不选择性地参与通信。 此外，在接收侧，可以从正版数据块中移除伪块，以使数据被解码。 在这种情况下，发送侧的以太网设备和接收侧的以太网设备可以通过使用车道状态消息来交换分配了虚拟块的通道的信息，并且车道状态消息可以基于 链路故障信息由以太网标准指定。

公开(公告)号：US20100142971A1

公开(公告)日：2010-06-10

申请号：US12628920

申请日：2009-12-01

Applicant: Sun-hyok Chang ,  Hwan-seok Chung ,  Kwang-joon Kim

Inventor： Sun-hyok Chang ,  Hwan-seok Chung ,  Kwang-joon Kim

IPC: H04B10/00 ,  H04B10/06

CPC classification number: H04B10/614 ,  H04B10/61 ,  H04B10/611 ,  H04B10/6164 ,  H04B10/6165

Abstract: Provided is a digital signal synchronization device of a coherent optical receiver. The digital signal synchronization device includes a digital signal processing unit to perform synchronization on a digital signal of an output optical signal generated by interfering an optical signal received through an optical fiber with an optical signal of laser output from a local oscillator and to perform decoding using the synchronized digital signal, and a digital signal managing unit to monitor the digital signal processing unit to output data of the optical signal normally, which has been received through the optical fiber, according to the synchronized digital signal.

Abstract translation: 提供了一种相干光接收机的数字信号同步装置。 数字信号同步装置包括数字信号处理单元，用于对通过光纤接收的光信号与从本地振荡器输出的激光的光信号进行干扰而产生的输出光信号的数字信号进行同步，并且使用 同步数字信号和数字信号管理单元，用于监视数字信号处理单元，以根据同步的数字信号正常地输出已经通过光纤接收的光信号的数据。