公开(公告)号：US07230958B2

公开(公告)日：2007-06-12

申请号：US10835225

申请日：2004-04-28

申请人： Sun Hyok Chang ,  Hee Sang Chung ,  Jin Soo Han ,  Ji Sung Jung ,  Heuk Park ,  Won Kyoung Lee ,  Hyun Jae Lee

发明人： Sun Hyok Chang ,  Hee Sang Chung ,  Jin Soo Han ,  Ji Sung Jung ,  Heuk Park ,  Won Kyoung Lee ,  Hyun Jae Lee

IPC分类号： H01S3/30

CPC分类号： H01S3/302 ,  H01S3/06754 ,  H01S3/094076 ,  H01S3/094096 ,  H01S3/1301 ,  H01S3/1305

摘要： Provided are a Raman amplifier and a Raman pumping method. A light source unit outputs a pumping light having a wavelength that periodically changes. A light intensity control unit varies a light intensity of the pumping light using the pumping light to improve the gain flatness of a Raman gain. A control unit directs the light intensity control unit to control the light intensity of the pumping light in synchronization with changes in the wavelength of the pumping light.

摘要翻译： 提供了拉曼放大器和拉曼泵浦方法。 光源单元输出具有周期性变化的波长的泵浦光。 光强度控制单元使用泵浦光来改变泵浦光的光强度，以提高拉曼增益的增益平坦度。 控制单元引导光强度控制单元与泵浦光的波长的变化同步地控制泵浦光的光强度。

公开(公告)号：US20050078354A1

公开(公告)日：2005-04-14

申请号：US10814676

申请日：2004-03-30

申请人： Sun-Hyok Chang ,  Jin-Soo Han ,  Ji-Sung Jung ,  Heuk Park ,  Won-Kyoung Lee ,  Hyun-Jae Lee ,  Hee-Sang Chung

发明人： Sun-Hyok Chang ,  Jin-Soo Han ,  Ji-Sung Jung ,  Heuk Park ,  Won-Kyoung Lee ,  Hyun-Jae Lee ,  Hee-Sang Chung

IPC分类号： G02F1/35 ,  H01S3/00 ,  H01S3/10 ,  H01S3/23 ,  H01S3/30

摘要： Optical fiber amplifier with wide input power dynamic range is employed to make a first gain block and an optical fiber pumped by Raman pump have opposite spectral gain profiles each other, thereby obtaining flat output gain profile. The optical fiber amplifier includes: a first and a second gain blocks, wherein each gain block has a gain medium and at least one optical pump; an optical fiber disposed between the first and the second gain blocks; a Raman pump for generating a pumping light; and a coupling means for coupling the pumping light to the optical fiber.

摘要翻译： 采用具有宽输入功率动态范围的光纤放大器来制造第一增益块，并且由拉曼泵泵浦的光纤具有相反的频谱增益分布，从而获得平坦的输出增益分布。 光纤放大器包括：第一增益块和第二增益块，其中每个增益块具有增益介质和至少一个光泵; 布置在第一和第二增益块之间的光纤; 用于产生泵浦光的拉曼泵; 以及用于将泵浦光耦合到光纤的耦合装置。

公开(公告)号：US20050122570A1

公开(公告)日：2005-06-09

申请号：US10835225

申请日：2004-04-28

申请人： Sun Hyok Chang ,  Hee Sang Chung ,  Jin Soo Han ,  Ji Sung Jung ,  Heuk Park ,  Won Kyoung Lee ,  Hyun Jae Lee

发明人： Sun Hyok Chang ,  Hee Sang Chung ,  Jin Soo Han ,  Ji Sung Jung ,  Heuk Park ,  Won Kyoung Lee ,  Hyun Jae Lee

IPC分类号： G02F1/35 ,  H01S3/067 ,  H01S3/094 ,  H01S3/13 ,  H01S3/131 ,  H01S3/30

CPC分类号： H01S3/302 ,  H01S3/06754 ,  H01S3/094076 ,  H01S3/094096 ,  H01S3/1301 ,  H01S3/1305

摘要： Provided are a Raman amplifier and a Raman pumping method. A light source unit outputs a pumping light having a wavelength that periodically changes. A light intensity control unit varies a light intensity of the pumping light using the pumping light to improve the gain flatness of a Raman gain. A control unit directs the light intensity control unit to control the light intensity of the pumping light in synchronization with changes in the wavelength of the pumping light.

摘要翻译： 提供了拉曼放大器和拉曼泵浦方法。 光源单元输出具有周期性变化的波长的泵浦光。 光强度控制单元使用泵浦光来改变泵浦光的光强度，以提高拉曼增益的增益平坦度。 控制单元引导光强度控制单元与泵浦光的波长的变化同步地控制泵浦光的光强度。

公开(公告)号：US07242834B2

公开(公告)日：2007-07-10

申请号：US10903056

申请日：2004-07-30

申请人： Won Kyoung Lee ,  Heuk Park ,  Hyun Jae Lee

发明人： Won Kyoung Lee ,  Heuk Park ,  Hyun Jae Lee

IPC分类号： G02B6/02 ,  G02B6/00

CPC分类号： G02B6/02028 ,  G02B6/02276 ,  G02B6/0281 ,  G02B6/03633 ,  G02B6/03644 ,  G02F1/395 ,  G02F2001/392

摘要： Provided is a dispersion-shifted fiber for an optical parametric amplifier. The dispersion-shifted fiber is a silica-based optical fiber and has a large nonlinear coefficient and a small effective area. The dispersion-shifted fiber also reduces a bending loss and a splice loss due to a mode field diameter difference between it and a conventional single mode fiber. For this, the dispersion-shifted fiber comprises a rectangular core with a very small radius and a high refractive index, a depressed inner clad, and an outer clad with a ring. The core and/or the inner clad are/is doped with a heavy metal.

摘要翻译： 提供了一种用于光学参量放大器的色散位移光纤。 色散位移光纤是一种二氧化硅基光纤，具有非线性系数大，有效面积小。 色散位移光纤还减少了由于其与常规单模光纤之间的模场直径差导致的弯曲损耗和接合损耗。 为此，色散位移光纤包括具有非常小的半径和高折射率的矩形芯，凹陷的内包层和具有环的外包层。 芯和/或内包层掺杂有重金属。

公开(公告)号：US07133196B1

公开(公告)日：2006-11-07

申请号：US11320418

申请日：2005-12-27

申请人： Won Kyoung Lee ,  Heuk Park ,  Kwang Joon Kim

发明人： Won Kyoung Lee ,  Heuk Park ,  Kwang Joon Kim

IPC分类号： H01S3/00

CPC分类号： H01S3/10007 ,  H01S3/06754 ,  H01S2301/02 ,  H01S2301/04

摘要： 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.

摘要翻译： 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：US20090116848A1

公开(公告)日：2009-05-07

申请号：US12293973

申请日：2007-02-21

申请人： Bong-Kyu Kim ,  Heuk Park ,  Kwangjoon Kim ,  Bong-Tae Kim

发明人： Bong-Kyu Kim ,  Heuk Park ,  Kwangjoon Kim ,  Bong-Tae Kim

IPC分类号： H04B10/00

CPC分类号： H04L25/4904 ,  H03M5/12 ,  H04B10/2587

摘要： An optical communication system and method using Manchester encoded signal remodulation are provided. The optical communication system includes a transmitter generating and transmitting a Manchester encoded optical signal including a first data stream, and a receiver receiving an optical signal obtained by dividing power of the Manchester encoded optical signal into two parts and modulating one of the two parts to include a second data stream, and recovering the second data stream. In two-way communication, the optical communication system and method allow one party to generate and transmit a Manchester encoded signal (i.e., a downstream signal) to the other party and allow the other party to generate an upstream signal by modulating the optical power of the downstream signal without using a light source.

摘要翻译： 提供了使用曼彻斯特编码信号再调制的光通信系统和方法。 光通信系统包括发射和发送包括第一数据流的曼彻斯特编码的光信号的发射机和接收通过将曼彻斯特编码的光信号的功率分成两部分而获得的光信号的接收机，并且调制这两部分中的一个以包括 第二数据流，并且恢复第二数据流。 在双向通信中，光通信系统和方法允许一方生成曼彻斯特编码信号（即，下行信号）并发送给另一方，并允许另一方通过调制光信号的光功率来产生上行信号 下游信号不使用光源。

公开(公告)号：US20050111802A1

公开(公告)日：2005-05-26

申请号：US10903056

申请日：2004-07-30

申请人： Won Lee ,  Heuk Park ,  Hyun Lee

发明人： Won Lee ,  Heuk Park ,  Hyun Lee

IPC分类号： G02B6/00 ,  G02B6/02 ,  G02F1/39 ,  G02B6/16 ,  G02B6/18

CPC分类号： G02B6/02028 ,  G02B6/02276 ,  G02B6/0281 ,  G02B6/03633 ,  G02B6/03644 ,  G02F1/395 ,  G02F2001/392

摘要： Provided is a dispersion-shifted fiber for an optical parametric amplifier. The dispersion-shifted fiber is a silica-based optical fiber and has a large nonlinear coefficient and a small effective area. The dispersion-shifted fiber also reduces a bending loss and a splice loss due to a mode field diameter difference between it and a conventional single mode fiber. For this, the dispersion-shifted fiber comprises a rectangular core with a very small radius and a high refractive index, a depressed inner clad, and an outer clad with a ring. The core and/or the inner clad are/is doped with a heavy metal.

摘要翻译： 提供了一种用于光学参量放大器的色散位移光纤。 色散位移光纤是一种二氧化硅基光纤，具有非线性系数大，有效面积小。 色散位移光纤还减少了由于其与常规单模光纤之间的模场直径差导致的弯曲损耗和接合损耗。 为此，色散位移光纤包括具有非常小的半径和高折射率的矩形芯，凹陷的内包层和具有环的外包层。 芯和/或内包层掺杂有重金属。

公开(公告)号：US20110134777A1

公开(公告)日：2011-06-09

申请号：US12960403

申请日：2010-12-03

申请人： Heuk Park

发明人： Heuk Park

IPC分类号： H04L12/56 ,  H04L12/26

CPC分类号： H04L41/5019 ,  H04L43/0835 ,  H04L43/0858 ,  H04L43/106 ,  H04L45/302

摘要： In order for a packet transporting system to transport packets for service in real time, the system estimates whether the first route for transporting the packet provides the quality of service (QoS) required by the service. If the first route is qualified to provide the QoS for transporting the packet, the system estimates whether the first route group including the first route satisfies the reliability required by the service. If the first route group is disqualified to provide the reliability required by the service, the system searches for the second route different from the first route, adds the second route to the first route group, and estimates whether the updated first route group satisfies the reliability, and if, as a result of the reliability estimation, the updated first route group is qualified to provide the reliability, transports the packet in real time by using the first route group which is comprised of the first route and the second route.

摘要翻译： 为了使分组传送系统实时传输分组进行服务，系统估计用于传送分组的第一路由是否提供服务所需的服务质量（QoS）。 如果第一条路由有资格提供用于传输数据包的QoS，则系统估计包括第一路由的第一路由组是否满足服务所要求的可靠性。 如果第一路由组被取消资格以提供服务所要求的可靠性，则系统搜索与第一路由不同的第二路由，将第二路由添加到第一路由组，并估计更新的第一路由组是否满足可靠性 并且如果作为可靠性估计的结果，更新的第一路由组被限定为提供可靠性，则通过使用由第一路由和第二路由组成的第一路由组来实时传输分组。

公开(公告)号：US20090150945A1

公开(公告)日：2009-06-11

申请号：US12137967

申请日：2008-06-12

申请人： Heuk Park ,  Soon-seok Lee

发明人： Heuk Park ,  Soon-seok Lee

IPC分类号： H04N7/173

CPC分类号： H04N21/64322 ,  H04N7/17318 ,  H04N7/17336 ,  H04N21/47202 ,  H04N21/643 ,  H04N21/6437

摘要： A method and apparatus for providing a video-on-demand (VOD) service are provided. The VOD service providing method includes: receiving a media setup request message from a user terminal, converting the media setup request message using a second protocol which is different from a first protocol on which the media setup request message is based, transmitting the converted media setup request message through a transmission network, receiving a response message in response to the converted media setup request message through the transmission network, converting the response message using the first protocol on which the media setup request message is based, and transmitting the response message to the user terminal; and converting the converted media setup request message received through the transmission network using the first protocol on which the media setup request message is based, transmitting the newly converted media setup request message to a VOD streaming server, converting the response message from the VOD streaming server using the second protocol, and transmitting the converted response message through the transmission network. Therefore, by preventing overlap of control processes, which may both be initiated when two protocols are used together, it is possible to efficiently perform controlling of a VOD service.

摘要翻译： 提供了一种用于提供视频点播（VOD）服务的方法和装置。 VOD服务提供方法包括：从用户终端接收媒体建立请求消息，使用与媒体建立请求消息所基于的第一协议不同的第二协议转换媒体建立请求消息，发送转换的媒体设置 通过传输网络请求消息，通过传输网络响应于转换的媒体建立请求消息接收响应消息，使用媒体建立请求消息所基于的第一协议转换响应消息，并将响应消息发送到 用户终端; 以及使用所述媒体建立请求消息所基于的所述第一协议转换通过所述传输网络接收的转换的媒体建立请求消息，将所述新转换的媒体建立请求消息发送到VOD流服务器，从所述VOD流服务器转换所述响应消息 使用第二协议，并通过传输网络发送转换的响应消息。 因此，通过防止当两个协议一起使用时可以启动的控制处理的重叠，可以有效地执行VOD服务的控制。

公开(公告)号：US20070110443A1

公开(公告)日：2007-05-17

申请号：US11593909

申请日：2006-11-06

申请人： Bong Kim ,  Sang Park ,  Heuk Park ,  Kwang Kim

发明人： Bong Kim ,  Sang Park ,  Heuk Park ,  Kwang Kim

IPC分类号： H04J14/00

CPC分类号： H04J14/005

摘要： Provided are an acousto-optic filter and an optical code division multiple access (CDMA) system using the acousto-optic filter. The acousto-optic filter includes: an acousto-optic mode converter (AOMC) converting an optical signal of a specific optical frequency corresponding to a frequency of an electric signal of an optical signal of a first mode having a predetermined optical frequency band; and a mode stripper (MS) stripping an optical signal of the optical signal of the first mode that has been converted to a second mode.

摘要翻译： 提供了声光滤波器和使用声光滤波器的光码分多址（CDMA）系统。 声光滤波器包括：声光模式转换器（AOMC），其转换与具有预定光频带的第一模式的光信号的电信号的频率相对应的特定光频率的光信号; 以及模式剥离器（MS）剥离已经转换为第二模式的第一模式的光信号的光信号。