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    • 1. 发明授权
    • Wavelength division multiplexed passive optical network system
    • 波分复用无源光网络系统
    • US07295778B2
    • 2007-11-13
    • US10713393
    • 2003-11-14
    • Jea-Hyuck LeeSeong-Taek HwangYun-Je OhDae-Kwang Jung
    • Jea-Hyuck LeeSeong-Taek HwangYun-Je OhDae-Kwang Jung
    • H04J14/00
    • H04J14/0282H04B10/2503H04B10/40H04J14/02H04J14/0226H04J14/0246H04J14/025H04Q11/0067H04Q2011/0016
    • Disclosed is a wavelength division multiplexed passive optical network (WDM PON) system including a central office, a remote Node, and an optical fiber coupled between the central office and the remote node, wherein the central office includes an optical power splitter coupled to the optical fiber, wherein the optical power splitter (1) divides an upstream optical signal from the optical fiber into a plurality of upstream optical signals having substantially similar power and (2) outputs downstream optical signals to the optical fiber, and a plurality of optical transceiver modules to (1) receive the plurality of upstream optical signals, and (2) output the downstream optical signals to the optical power splitter, and wherein at least one of the optical transceiver modules having an optical transmitter including a semiconductor optical amplifier and a reflection-type optical fiber grating located at a predetermined distance from the semiconductor optical amplifier, the optical transmitter transmitting light of a pre-set wavelength resonating between the SOA and reflection-type optical fiber grating; and wherein at least one of the optical transceiver modules having an optical receiver having an optical fiber grating for transmitting light of a predetermined wavelength and an optical detector for detecting light passing through the optical fiber grating.
    • 公开了一种波分复用无源光网络(WDM PON)系统,包括中心局,远程节点和耦合在中心局与远程节点之间的光纤,其中中心局包括耦合到光学器件的光功率分配器 光纤,其中所述光功率分配器(1)将来自所述光纤的上行光信号划分成具有基本相似功率的多个上游光信号,以及(2)向所述光纤输出下行光信号,以及多个光收发模块 (1)接收多个上游光信号,以及(2)将下行光信号输出到光功率分配器,并且其中至少一个光收发模块具有光发射机,该光发射机包括半导体光放大器和反射 - 位于与半导体光放大器预定距离的光纤光栅,光发射 传输在SOA和反射型光纤光栅之间谐振的预设波长的光; 并且其中所述光收发器模块中的至少一个具有光接收器,所述光接收器具有用于透射预定波长的光的光纤光栅和用于检测通过所述光纤光栅的光的光学检测器。
    • 3. 发明授权
    • Wavelength division multiplexing optical transmitter using Fabry-Perot laser
    • 波分复用光发射机采用法布里 - 珀罗激光器
    • US07340173B2
    • 2008-03-04
    • US10776720
    • 2004-02-11
    • Dong-Jae ShinDae-Kwang JungJea-Hyuck LeeJung-Kee LeeJeong-Seok LeeSeong-Taek HwangYun-Je Oh
    • Dong-Jae ShinDae-Kwang JungJea-Hyuck LeeJung-Kee LeeJeong-Seok LeeSeong-Taek HwangYun-Je Oh
    • H04J14/02H04J14/00
    • H04J14/02H04B10/506
    • A WDM (Wavelength Division Multiplexing) optical transmitter using a Fabry-Perot laser is disclosed. The WDM optical transmitter includes a light source for outputting incoherent light of a prescribed wavelength bandwidth, a circulator having the first to the third ports, for outputting the incoherent light received at the first port coupled to the light source to the second port, and outputting an optical signal received at the second port to the third port coupled to the external waveguide, a WGR (Waveguide Grating Router) having a multiplexing port (MP) coupled to the second port of the circulator and a plurality of demultiplexing ports (DPs), for performing WD (Wavelength Division) demultiplexing on the incoherent light received at the MP to output WD-demultiplexed signals to the plurality of DPs, and performing WD multiplexing on a plurality of channel signals received at the plurality of DPs to output WD-multiplexed signals to the MP, and a plurality of FB (Fabry-Perot) lasers respectively connected to the DPs of the WGR, each FP laser is comprised of a laser cavity, an antireflection coating layer deposited at one end of the laser cavity facing a corresponding DP, and a high reflection coating layer deposited at the other end of the laser cavity, whereby an optical injection efficiency increases and an influence of reflected light is reduced, resulting in facilitation of a wavelength-locked phenomenon.
    • 公开了一种使用法布里 - 珀罗激光器的WDM(波分复用)​​光发射机。 WDM光发射机包括用于输出规定波长带宽的非相干光的光源,具有第一至第三端口的循环器,用于将耦合到光源的第一端口处接收到的非相干光输出到第二端口,并输出 在第二端口处接收到耦合到外部波导的第三端口的光信号,具有耦合到循环器的第二端口的复用端口(MP)的WGR(波导光栅路由器)和多个解复用端口(DP) 用于对在MP处接收到的非相干光进行WD(波分)解复用,以将WD分离的信号输出到多个DP,并且对在多个DP上接收的多个信道信号执行WD复用以输出WD复用信号 MP和分别连接到WGR的DP的多个FB(Fabry-Perot)激光器,每个FP激光器由激光腔,抗雷 在激光腔的面对相应的DP的一端沉积的吸收层,以及沉积在激光腔的另一端的高反射涂层,由此光注入效率增加并且反射光的影响减小,导致促进 的波长锁定现象。
    • 4. 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。