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    • 82. 发明申请
    • Wavelength-Division Multiplexed Passive Optical Network For Embodying Wavelength-Independent Operation of Wavelength-Locked Fabry-Perot Laser Diodes by Injecting a Low Noise Broadband Light Source
    • 波分复用无源光网络,用于通过注入低噪声宽带光源实现波长锁定法布里 - 珀罗激光二极管的波长独立运行
    • US20090092390A1
    • 2009-04-09
    • US12087723
    • 2006-07-11
    • Chang-Hee LeeKi-Man Choi
    • Chang-Hee LeeKi-Man Choi
    • H04J14/02H04B10/20
    • H04J14/0226H04B10/506H04J14/02H04J14/0246H04J14/025H04J14/0282H04J2014/0253
    • The present invention relates to a wavelength-division multiplexed passive optical network (WDM-PON) which embodies wavelength-independence of wavelength-locked Fabry Perot-Laser Diode (F-P LD). A WDM-PON of the present invention comprises an optical fiber being used for optical transmission to and from a broadband light source (BLS) with a low noise characteristic; first arrayed waveguide Gratings (AWG) for filtering light transmitted from the BLS which is oscillated in a plural mode into a group of n numbers wherein the first AWG have a bandwidth broader than a bandwidth of one mode of the BLS; n F-P LDs outputting wavelength-locked light by light being injected through the first AWG; a circulator bypassing and outputting wavelength-division multiplexed signals which are inputted through the first AWG and the optical fiber; and second AWG de-multiplexing the WDM signals into a group of n numbers wherein the second AWG have a bandwidth broader than the bandwidth of the BLS to be injected, wherein the number n is either the number of output ports of the first or second AWG or the number of channels of the WDM signals.
    • 波分复用无源光网络(WDM-PON)技术领域本发明涉及一种实现波长锁定法布里珀罗激光二极管(F-P LD)的波长独立性的波分复用无源光网络(WDM-PON)。 本发明的WDM-PON包括用于向具有低噪声特性的宽带光源(BLS)进行光传输的光纤; 第一阵列波导光栅(AWG),用于滤波从多个模式振荡的BLS发射的光,其中第一AWG具有比BLS的一种模式的带宽宽的带宽; n个F-P LD,通过第一AWG注入的光输出波长锁定的光; 绕过并输出通过第一AWG和光纤输入的波分复用信号的循环器; 并且第二AWG将WDM信号解复用为n个数组,其中第二AWG具有比要注入的BLS的带宽更宽的带宽,其中数量n是第一或第二AWG的输出端口的数量 或WDM信号的通道数。
    • 86. 发明申请
    • RECEIVER HAVING AN APPARATUS FOR VARYING DECISION THRESHOLD LEVEL AND AN OPTICAL TRANSMISSION SYSTEM HAVING THE SAME
    • 具有改变决策阈值的装置的接收器和具有该装置的光传输系统
    • US20070206964A1
    • 2007-09-06
    • 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。