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    • 4. 发明申请
    • Optical network for bi-directional wireless communication
    • 用于双向无线通信的光网络
    • US20060104636A1
    • 2006-05-18
    • US11281761
    • 2005-11-17
    • Dae-Kwang JungChang-Sup ShimYun-Je OhSeong-Taek Hwang
    • Dae-Kwang JungChang-Sup ShimYun-Je OhSeong-Taek Hwang
    • H04B10/20
    • H04J14/0291H04J14/0227H04J14/0241H04J14/0282H04J14/0283
    • A bi-directional metro-access optical network includes a central office for generating beams of different wavelength bands and a plurality of wavelength locked downward optical signals and for detecting wavelength locked upward optical signals; a plurality of nodes for detecting the downward optical signals of different wavelengths and for generating the wavelength locked upward optical signals of which wavelengths are locked by respective wavelength beams; a first optical fiber line for linking together each of the nodes with the central office in a ring shape, transmitting the upward optical signals to the central office, and transmitting the downward optical signals and the beams to each of the nodes; and a second optical fiber line for linking together each of the nodes with the central office in a ring shape along the circumference of the first optical fiber line.
    • 双向地铁接入光网络包括用于产生不同波长带的波束和多个波长锁定的向下的光信号的中心局和用于检测波长锁定的向上的光信号; 多个节点,用于检测不同波长的向下的光信号,并产生波长锁定的上行光信号,波长由各波长波束锁定; 用于将每个节点与中心局以环形形式连接在一起的第一光纤线路,将向上的光信号传输到中心局,并将向下的光信号和光束传输到每个节点; 以及第二光纤线路,用于将每个节点与中心局沿着第一光纤线路的圆周以环形形状连接在一起。
    • 5. 发明申请
    • Self-healing passive optical network
    • 自愈无源光网络
    • US20060165412A1
    • 2006-07-27
    • US11270145
    • 2005-11-09
    • Dae-Kwang JungChang-Sup ShimYun-Je OhSeong-Taek Hwang
    • Dae-Kwang JungChang-Sup ShimYun-Je OhSeong-Taek Hwang
    • H04J14/00
    • H04J14/0291H04J14/0226H04J14/0227H04J14/0246H04J14/0247H04J14/025H04J14/0252H04J14/0282H04J2014/0253
    • Disclosed is a self-healing passive optical network comprising: a station, such as a central office, for outputting first and second multiplexed downstream optical signals to first and second feeder fibers; a remote node connected to the central office through the first and second feeder fibers to demultiplex each input multiplexed downstream optical signal into a plurality of downstream optical signals and to output the demultiplexed downstream optical signals; and a plurality of optical network units for receiving one or more downstream optical signals, each of the optical network units are connected to the remote node through at least one distribution fiber, wherein the station outputs the first and second multiplexed downstream optical signals to the first and second feeder fibers, respectively, and outputs the first and second multiplexed downstream optical signals to one of the first and second feeder fibers when a defect occurs in a fiber.
    • 公开了一种自愈无源光网络,包括:诸如中心局的站,用于将第一和第二多路复用的下行光信号输出到第一和第二馈送光纤; 通过第一和第二馈送光纤连接到中心局的远程节点,将每个输入的多路复用下行光信号解复用为多个下行光信号,并输出解复用的下行光信号; 以及多个光网络单元,用于接收一个或多个下行光信号,每个光网络单元通过至少一个分配光纤连接到远程节点,其中,站将第一和第二多路复用下行光信号输出到第一 和第二馈电光纤,并且当光纤中出现缺陷时,将第一和第二多路复用的下行光信号输出到第一和第二馈送光纤之一。
    • 7. 发明申请
    • Method for removing cross-talk in wavelength division multiplexed passive optical network
    • 消除波分复用无源光网络串扰的方法
    • US20060171629A1
    • 2006-08-03
    • US11341727
    • 2006-01-27
    • Dong-Jae ShinChang-Sup ShimSeong-Taek HwangDae-Kwang Jung
    • Dong-Jae ShinChang-Sup ShimSeong-Taek HwangDae-Kwang Jung
    • G02B6/28
    • H04J14/0226H04B10/85H04J14/0246H04J14/025H04J14/028H04J14/0283H04J2014/0253
    • Disclosed is a method for removing cross-talk in a wavelength division multiplexed passive optical network (WDM-PON). The WDM-PON and the method remove cross-talk between adjacent wavelength channels due to incomplete alignment of wavelength channels in a MUX/de-MUX between a central office and a remote node in the WDM-PON employing light-injected light sources. The WDM-PON includes at least two broadband light sources having different bands, which provide injection light to be injected to light-injected channels light sources, a transmitter receiving injection from the broadband light sources, injecting the injection light to odd channel light-injected light sources and even channel light-injected light sources, arraying odd and even channels in such a manner that the odd and even channels belong to different spectrum bands, multiplexing the signal according channels, and transmitting the multiplexed signal. The WDM-PON may also include a receiver for receiving the multiplexed signal transmitted from the transmitter and splitting the multiplexed signal according to the odd and even channels.
    • 公开了一种在波分复用无源光网络(WDM-PON)中消除串扰的方法。 由于使用光注入光源的WDM-PON中的中心局和远程节点之间的MUX /解除MUX中的波长信道不完全对准,WDM-PON和该方法消除了相邻波长信道之间的串扰。 WDM-PON包括至少两个具有不同频带的宽带光源,其提供要注入到光注入通道光源的注入光,从宽带光源接收注入的发射器,将注入光注射到注入光的奇数通道 光源甚至通道光注入光源,以奇数和偶数信道属于不同频谱带的方式排列奇数和偶数信道,根据信道复用信号,并发送多路复用信号。 WDM-PON还可以包括用于接收从发射机发送的复用信号的接收机,并根据奇数和偶数信道分离多路复用信号。
    • 9. 发明授权
    • Method for maintaining wavelength-locking of Fabry-Perot laser regardless of change of external temperature and WDM light source using the method
    • 不管外部温度和WDM光源的变化如何,使用该方法维持法布里 - 珀罗激光器的波长锁定的方法
    • US07187700B2
    • 2007-03-06
    • US10730568
    • 2003-12-08
    • Dong-Jae ShinDae-Kwang JungJea-Hyuck LeeJung-Kee LeeSeong-Taek HwangYun-Je Oh
    • Dong-Jae ShinDae-Kwang JungJea-Hyuck LeeJung-Kee LeeSeong-Taek HwangYun-Je Oh
    • H01S3/13
    • H04B10/572H01S5/4006
    • Disclosed is a method for maintaining wavelength-locking of a Fabry-Perot laser regardless of a change of external temperature even though a temperature controller is not used, and a wavelength division multiplexing (WDM) light source using the method, as an economical light source used in a WDM optical communication field. The WDM light source comprises a Fabry-Perot laser for injecting spectrum-spliced incoherent light to amplify and output only an oscillation mode matching with a wavelength of the injected light, and a bias controlling unit for adjusting a bias current supplied to the Fabry-Perot laser to a value adjacent to a threshold current of the Fabry-Perot laser, whose threshold current is changed according to a temperature and a relationship between the injected light changed depending to a temperature and a wavelength of the oscillation mode. Therefore, the bias current having a value adjacent to the threshold current of the Fabry-Perot laser is supplied to the Fabry-Perot laser, so that the Fabry-Perot laser can maintain an excellent transmission characteristic regardless of a change of temperature even though a temperature controller is not used.
    • 公开了即使不使用温度控制器也能够保持法布里 - 珀罗激光器的波长锁定的方法,而不管外部温度的变化如何,并且使用该方法作为经济光源的波分复用(WDM)光源 用于WDM光通信领域。 WDM光源包括用于注入频谱拼接的非相干光的法布里 - 珀罗激光器,以放大和仅输出与注入的光的波长匹配的振荡模式;以及偏置控制单元,用于调节提供给法布里 - 珀罗 激光到与Fabry-Perot激光器的阈值电流相邻的值,其阈值电流根据温度改变,并且注入的光随温度变化和振荡模式的波长之间的关系而改变。 因此,具有与法布里 - 珀罗激光器的阈值电流相邻的值的偏置电流被提供给法布里 - 珀罗激光器,使得法布里 - 珀罗激光器可以保持优异的传输特性,而不管温度的变化,即使 温度控制器不使用。
    • 10. 发明申请
    • SCM-PON using WDM
    • SCM-PON使用WDM
    • US20060222365A1
    • 2006-10-05
    • US11395099
    • 2006-03-31
    • Dae-Kwang JungSeong-Taek HwangYun-Je OhJin-Woo ParkIl-Rae Kim
    • Dae-Kwang JungSeong-Taek HwangYun-Je OhJin-Woo ParkIl-Rae Kim
    • H04J14/00
    • H04J14/0226H04J14/0247H04J14/0252H04J14/0282H04J14/0298
    • A SCM-PON using WDM includes: an OLT for transferring downstream data from an external service provider through downstream optical signals and transferring upstream data transferred through upstream optical signals to an outside; an ODN for distributing the downstream optical signals from the OLT and multiplexing the upstream optical signals to the OLT; and a plurality of ONUs for processing the downstream optical signals transferred from the OLT through the ODN and transferring upstream data of subscribers for the OLT through the upstream optical signals, wherein the optical signals between the OLT and the ONUs are divided into wavelength channels with different wavelengths and sub-carrier channels obtained by time-dividing the wavelength channels, and the upstream data and the downstream data are transferred through the sub-carrier channels.
    • 使用WDM的SCM-PON包括:OLT,用于通过下行光信号从外部服务提供商传送下行数据,并将通过上行光信号传送的上行数据传送到外部; 用于分配来自OLT的下行光信号并将上行光信号复用到OLT的ODN; 以及多个ONU,用于处理从OLT通过ODN传送的下行光信号,并通过上行光信号传输OLT的用户的上行数据,其中OLT和ONU之间的光信号被分成不同的波长信道 通过时分波长信道获得的波长和子载波信道,并且上行数据和下行数据通过子载波信道传送。