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    • 7. 发明授权
    • Optical modulation method and system in wavelength locked FP-LD by injecting broadband light source using mutually injected FP-LD
    • 通过使用相互注入的FP-LD注入宽带光源,在波长锁定的FP-LD中的光学调制方法和系统
    • US08073334B2
    • 2011-12-06
    • US11665902
    • 2005-11-08
    • Chang-Hee LeeKi-Man Choi
    • Chang-Hee LeeKi-Man Choi
    • H04B10/00H04B10/04H04B10/12H04J14/02
    • H04B10/5167H04B10/503H04B10/5162
    • The present invention relates to an optical modulation method and optical modulation system of a wavelength locked Fabry Perot-Laser Diode (FP-LD) by injecting a broadband light source (BLS) using mutual injection of FP-LDs. More specifically, the present invention relates to a novel modulation technology which embodies a wavelength locked FP-LD capable of being used as an economic light source in an optical network based on a wavelength-division multiplexing passive optical network (WDM-PON). According to the present invention, a light modulation system is suggested comprising: BLS being constructed by mutual injection between two FP-LDs and an optical fiber being used for light transmission; first AWG for filtering light from a plurality of oscillation modes of the BLS into n group; n FP-LDs outputting wavelength locked light which is divided through the first AWG; an encoder being provided at a transmitting end of a subscriber to which the output from the first AWG is transmitted; a circulator outputting light which is inputted through the first AWG; second AWG de-multiplexing WDM signals from the first AWG into n group; and a decoder being provided at a receiving end to which the output from the second AWG is transmitted. Therefore, the present invention makes it possible to provide a more economic light source for WDM-PON subscribers by embodying a wavelength locked FP-LD by injecting a low-cost BLS.
    • 本发明涉及通过使用相互注入FP-LD注入宽带光源(BLS)的波长锁定法布里珀罗激光二极管(FP-LD)的光调制方法和光调制方式。 更具体地说,本发明涉及一种新颖的调制技术,它体现了一种能够在基于波分复用无源光网络(WDM-PON)的光网络中用作经济光源的波长锁定FP-LD。 根据本发明,提出了一种光调制系统,其包括:BLS通过两个FP-LD之间的相互注入和用于光透射的光纤构成; 将来自BLS的多个振荡模式的光过滤成n组的第一AWG; n个FP-LD,输出通过第一AWG划分的波长锁定光; 编码器被提供在用户的发送端,来自第一AWG的输出被发送到该编码器; 输出通过第一AWG输入的光的循环器; 第二AWG将WDM信号从第一AWG解复用为n组; 并且解码器被提供在接收端,来自第二AWG的输出被发送到接收端。 因此,本发明通过注入低成本的BLS来实现波长锁定的FP-LD,可以为WDM-PON用户提供更经济的光源。
    • 8. 发明授权
    • Optical access network using wavelength-locked WDM optical source injected by incoherent light
    • 使用波长锁定WDM光源的光接入网由非相干光注入
    • US07912372B2
    • 2011-03-22
    • US11166362
    • 2005-06-24
    • Chang Hee LeeJin Serk BaikKeun Youl ParkSeung Hyun JangKi Man ChoiHyun Sik Min
    • Chang Hee LeeJin Serk BaikKeun Youl ParkSeung Hyun JangKi Man ChoiHyun Sik Min
    • H04J14/00
    • H04J14/0226H04J14/0227H04J14/0246H04J14/0247H04J14/025H04J14/0252H04J14/0282H04L12/2801
    • The present invention relates to a passive optical network, which inexpensively improves the spectral efficiency of an access network and is capable of increasing the number of subscribers per channel by using WDM in combination with Time Division Multiplexing (TDM) or SubCarrier Multiple Access (SCMA) to expand a conventional WDM passive optical network. The passive optical network includes light providing means provided in a central office to provide broadband incoherent light; a multiplexer connected to the central office via an optical fiber to divide the light transmitted from the light providing means according to wavelengths and to multiplex upstream signals; a plurality of splitters to branch divided lights and to combine the upstream optical signals; and a plurality of subscribers connected to the splitters, the subscribers including wavelength-locked Fabry-Perot laser diodes capable of performing direct and analog modulation, and means for directly modulating lights of the Fabry-Perot laser diodes and transmitting modulated lights to the subscribers using time division multiplexing.
    • 无源光网络技术本发明涉及无线光网络,其能够廉价地提高接入网络的频谱效率,并且能够通过结合时分多路复用(TDM)或子载波多路访问(SCMA)使用WDM来增加每个信道的用户数量, 扩展传统的WDM无源光网络。 无源光网络包括提供在中心局的光提供装置,以提供宽带非相干光; 多路复用器,经由光纤连接到中心局,以根据波长划分从光提供装置发射的光,并对上行信号进行复用; 多个分离器,分支分光,并组合上游光信号; 以及连接到分离器的多个用户,用户包括能够执行直接和模拟调制的波长锁定法布里 - 珀罗激光二极管,以及用于直接调制法布里 - 珀罗激光二极管的光并将调制光发射到订户的装置 时分复用。
    • 9. 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。