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    • 53. 发明授权
    • Receiver having an apparatus for varying decision threshold level and an optical transmission system having the same
    • 具有用于改变判定阈值水平的装置的接收机和具有其的光传输系统
    • US07920797B2
    • 2011-04-05
    • US11747168
    • 2007-05-10
    • Chang-Hee LeeSil-Gu Mun
    • Chang-Hee LeeSil-Gu Mun
    • H04B10/06
    • H04B10/66
    • The disclosure relates to an optical receiver having an apparatus for varying decision threshold level and an optical transmission system having the same. An optical receiver having an apparatus for varying decision threshold level includes a photo diode (PD) for receiving an optical signal and transforming the received optical signal into an electrical signal; a trans-impedance amplifier (TIA) for pre-amplifying the electrical signal transformed by the PD; a limiting amplifier (LA) for deciding the electrical signal amplified by the TIA as either level 0 or level 1 and for amplifying the decision signal; a clock and data recovery (CDR) for generating a clock and data from the amplified decision signal by the LA; and a control circuit for adjusting a decision threshold level depending on the received optical signal power by the PD and for providing the adjusted decision threshold level with the LA.
    • 本公开涉及一种具有用于改变判定阈值电平的装置的光接收机和具有其的光传输系统。 具有用于改变判定阈值电平的装置的光接收机包括:光电二极管(PD),用于接收光信号并将接收到的光信号变换为电信号; 用于对由PD变换的电信号进行预放大的跨阻抗放大器(TIA); 限制放大器(LA),用于将由TIA放大的电信号判定为0级或1级,并用于放大判定信号; 用于由LA从放大的判定信号产生时钟和数据的时钟和数据恢复(CDR); 以及控制电路,用于根据PD接收到的光信号功率调整判定阈值电平,并提供与LA的调整后的判定阈值电平。
    • 55. 发明授权
    • Method and network architecture for upgrading legacy passive optical network to wavelength division multiplexing passive optical network based next-generation passive optical network
    • 将传统无源光网络升级为波分复用无源光网络的下一代无源光网络的方法和网络架构
    • US07773838B2
    • 2010-08-10
    • US12513741
    • 2006-11-14
    • Chang-Hee LeeKi-Man ChoiSil-Gu MunJung-Hyung MoonHoon-Keun Lee
    • Chang-Hee LeeKi-Man ChoiSil-Gu MunJung-Hyung MoonHoon-Keun Lee
    • G02B6/28
    • H04J14/02H04J14/0201H04J14/0226H04J14/0227H04J14/0247H04J14/0252H04J14/0282H04J2014/0253
    • The present invention discloses a network architecture for upgrading a legacy time division multiplexing-passive optical network (TDM-PON) to a wavelength division multiplexing-passive optical network (WDM-PON) based next-generation passive optical network (next-generation PON), wherein the legacy TDM-PON comprises: a central office (CO) having a first optical line termination (OLT); a remote node (RN) having a splitter; a single mode fiber (SMF) connecting the first OLT and the splitter; and a first group of one or more optical network terminations (ONTs) being connected to the splitter by a first group of one or more distribution fibers, and wherein the network architecture further comprises: in case that the next-generation PON is a WDM-PON, a first apparatus for combining and splitting wavelength bands being positioned between the SMF and the first OLT, in order to add a second OLT to be used for the WDM-PON within the CO or within another CO which is located in a position different from the CO, while sharing the SMF; a second apparatus for combining and splitting wavelength bands being positioned at a front terminal of the splitter; and an arrayed waveguide grating (AWG) being connected to the second apparatus for combining and splitting wavelength bands within the RN, and being connected to a second group of one or more ONTs by a second group of one or more distribution fibers within the RN or within another RN which is located in a position different from the RN.
    • 本发明公开了一种用于将传统时分复用无源光网络(TDM-PON)升级为基于波分多路复用无源光网络(WDM-PON)的下一代无源光网络(下一代PON)的网络架构, ,其中所述传统TDM-PON包括:具有第一光线路终端(OLT)的中心局(CO); 具有分离器的远程节点(RN); 连接第一OLT和分离器的单模光纤(SMF); 以及由第一组一个或多个分配光纤连接到分离器的第一组一个或多个光网络终端(ONT),并且其中所述网络架构还包括:在下一代PON是WDM- PON是用于组合和分离位于SMF和第一OLT之间的波长带的第一装置,以便添加用于CO内的WDM-PON或位于不同位置的另一CO内的WDM-PON的第二OLT 从CO共享SMF; 用于组合和分离位于分离器的前端的波长带的第二装置; 和连接到第二装置的阵列波导光栅(AWG),用于组合和分离RN内的波段,并且由RN内的一个或多个分配光纤的第二组连接到一个或多个ONT的第二组,或者 位于与RN不同的位置的另一RN内。
    • 56. 发明申请
    • METHOD AND NETWORK ARCHITECTURE FOR UPGRADING LEGACY PASSIVE OPTICAL NETWORK TO WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK BASED NEXT-GENERATION PASSIVE OPTICAL NETWORK
    • 用于将LEGACY被动光网络升级为波长段的方法和网络架构多路复用基于无源光网络的下一代被动光网络
    • US20100054740A1
    • 2010-03-04
    • US12513741
    • 2006-11-14
    • Chang-Hee LeeKi-Man ChoiSil-Gu MunJung-Hyung MoonHoon-Keun Lee
    • Chang-Hee LeeKi-Man ChoiSil-Gu MunJung-Hyung MoonHoon-Keun Lee
    • H04J14/00H04J14/08H04J14/02
    • H04J14/02H04J14/0201H04J14/0226H04J14/0227H04J14/0247H04J14/0252H04J14/0282H04J2014/0253
    • The present invention discloses a network architecture for upgrading a legacy time division multiplexing-passive optical network (TDM-PON) to a wavelength division multiplexing-passive optical network (WDM-PON) based next-generation passive optical network (next-generation PON), wherein the legacy TDM-PON comprises: a central office (CO) having a first optical line termination (OLT); a remote node (RN) having a splitter; a single mode fiber (SMF) connecting the first OLT and the splitter; and a first group of one or more optical network terminations (ONTs) being connected to the splitter by a first group of one or more distribution fibers, and wherein the network architecture further comprises: in case that the next-generation PON is a WDM-PON, a first apparatus for combining and splitting wavelength bands being positioned between the SMF and the first OLT, in order to add a second OLT to be used for the WDM-PON within the CO or within another CO which is located in a position different from the CO, while sharing the SMF; a second apparatus for combining and splitting wavelength bands being positioned at a front terminal of the splitter; and an arrayed waveguide grating (AWG) being connected to the second apparatus for combining and splitting wavelength bands within the RN, and being connected to a second group of one or more ONTs by a second group of one or more distribution fibers within the RN or within another RN which is located in a position different from the RN.
    • 本发明公开了一种用于将传统时分复用无源光网络(TDM-PON)升级为基于波分多路复用无源光网络(WDM-PON)的下一代无源光网络(下一代PON)的网络架构, ,其中所述传统TDM-PON包括:具有第一光线路终端(OLT)的中心局(CO); 具有分离器的远程节点(RN); 连接第一OLT和分离器的单模光纤(SMF); 以及由第一组一个或多个分配光纤连接到分离器的第一组一个或多个光网络终端(ONT),并且其中所述网络架构还包括:在下一代PON是WDM- PON是用于组合和分离位于SMF和第一OLT之间的波长带的第一装置,以便添加用于CO内的WDM-PON或位于不同位置的另一CO内的WDM-PON的第二OLT 从CO共享SMF; 用于组合和分离位于分离器的前端的波长带的第二装置; 和连接到第二装置的阵列波导光栅(AWG),用于组合和分离RN内的波段,并且由RN内的一个或多个分配光纤的第二组连接到一个或多个ONT的第二组,或者 位于与RN不同的位置的另一RN内。
    • 57. 发明授权
    • Method for fabricating neutron supermirror using neutron monochromator structures
    • 使用中子单色器结构制造中子超镜的方法
    • US07635839B2
    • 2009-12-22
    • US11695073
    • 2007-04-02
    • Sang-Jin ChoChang-Hee LeeHark-Rho KimJi-Yong So
    • Sang-Jin ChoChang-Hee LeeHark-Rho KimJi-Yong So
    • B21D33/00G21C7/00
    • G21K1/062B82Y10/00G21K2201/067G21K2201/068Y10S376/904Y10S376/906Y10T29/301Y10T29/303
    • A method for fabricating a supermirror for forming a neutron guide. In the method, a neutron supermirror, which is widely used in the formation of thin films in cold neutron guides and the spectrometer field, is fabricated with nickel thin films and titanium thin films, having varying thickness, using a combination of monochromator structures in which nickel thin films and titanium thin films, having the same thickness, are stacked in the form of periodic structures. According to the method, a combination of monochromator structures having a variety of different thicknesses is formed, such that the amount of the overlap of peaks due to the monochromator structures can be adjusted to increase reflectivity, and some of the monochromator structures can be removed during the fabrication of the supermirror to make it easy to extract monochromatic beams, such that it is easy to fabricate a transmission monochromator, rather than a reflection monochromator.
    • 一种用于制造用于形成中子引导件的超镜的方法。 在该方法中,广泛用于在冷中子导向器和光谱仪场中形成薄膜的中子超镜由具有不同厚度的镍薄膜和钛薄膜制成,使用单色器结构的组合,其中 具有相同厚度的镍薄膜和钛薄膜以周期性结构的形式堆叠。 根据该方法,形成具有各种不同厚度的单色器结构的组合,使得可以调节由于单色器结构引起的峰的重叠量以增加反射率,并且可以在一些单色器结构中去除一些单色器结构 超镜的制造使得易于提取单色光束,使得易于制造透射单色仪而不是反射单色仪。
    • 59. 发明授权
    • Light source capable of lasing that is wavelength locked by an injected light signal
    • 能够通过注入的光信号波长锁定的能够激发的光源
    • US07515626B2
    • 2009-04-07
    • US10558820
    • 2003-05-29
    • Chang-Hee LeeWayne V. Sorin
    • Chang-Hee LeeWayne V. Sorin
    • H01S3/092
    • H04J14/02H04B10/2587H04B10/506H04J14/0226H04J14/0246H04J14/025H04J14/0282
    • Various methods, systems, and apparatuses are described in which a light source (101) capable of lasing is wavelength locked by an injected light signal. The light source (101) capable of lasing, such as a Fabry-Perot laser diode, may have antireflective coating on one or more facets of the light source (101) capable of lasing. The light source (101) capable of lasing receives a spectral slice of a light signal from a broadband light source (113) to wavelength lock the output wavelength of the light source (101) capable of lasing within the bandwidth of the injected light signal. A current pump (141) may bias the light source (101) capable of lasing to operate as a reflective regenerate semiconductor optical amplifier so that the injected light is reflected back out a front facet after being amplified and wavelength locked. The current pump (141) may also bias the light source (101) capable of lasing such that the externally injected narrow-band light signal into the light source (101) capable of lasing suppresses the lasing modes outside of the bandwidth of injected incoherent light.
    • 描述了可以通过注入的光信号波长锁定能够激光的光源(101)的各种方法,系统和装置。 能够激光的光源(101),例如法布里 - 珀罗激光二极管,可以在能够发射的光源(101)的一个或多个面上具有抗反射涂层。 能够进行激光的光源(101)从宽带光源(113)接收光信号的光谱片,以在注入的光信号的带宽内波长锁定能够发光的光源(101)的输出波长。 电流泵(141)可以偏置能够发光的光源(101)作为反射再生半导体光放大器工作,使得注入的光在被放大和波长锁定之后被反射回前面。 电流泵(141)也可以偏置能够发射的光源(101),从而外部注入的窄带光信号进入能够激发的光源(101)中抑制注入非相干光带宽以外的激光模式 。