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    • 9. 发明授权
    • Wavelength tracking apparatus and method in WDM-PON system
    • WDM-PON系统中的波长跟踪装置及方法
    • US07881613B2
    • 2011-02-01
    • US11635701
    • 2006-12-07
    • Byoung Whi KimWoo Ram LeeYun Chur ChungEui Seung SonJang Won Chae
    • Byoung Whi KimWoo Ram LeeYun Chur ChungEui Seung SonJang Won Chae
    • H04B10/08
    • H04J14/02H04J14/0221H04J14/0226H04J14/0227H04J14/0246H04J14/025H04J14/0282
    • Provided are an apparatus and method for tracking a wavelength in a passive optical subscriber network in which a central base station and at least one subscriber terminal are connected via a remote node. The apparatus includes a first wavelength aligning unit multiplexing and aligning wavelengths of optical signals from a plurality of single-mode optical sources of the central base station; a second wavelength aligning unit multiplexing and aligning wavelengths of optical signals transmitted to the remote node from a plurality of single-mode optical sources of the subscriber terminal; and a third wavelength aligning unit demultiplexing and aligning wavelengths of optical signals from the second wavelength aligning unit, the third wavelength aligning unit being included in the central base station. Accordingly, when the wavelengths of passbands of a multiplexer/demultiplexer (MUX/DEMUX) of a remote station change due to a change in the ambient temperature, wavelength tracking is performed by making aligned the wavelengths of optical sources of a central base station, a multiplexer/demultiplexer, and subscriber terminals, thereby minimizing optical channel loss and enabling reliable management of WDM-PON.
    • 提供了一种用于跟踪无源光用户网络中的波长的装置和方法,其中中央基站和至少一个用户终端经由远程节点连接。 该装置包括:第一波长对准单元,复用并对准来自中央基站的多个单模光源的光信号的波长; 第二波长对准单元,从用户终端的多个单模光源复用并对准从远程节点传输的光信号的波长; 以及第三波长对准单元,对来自所述第二波长对准单元的光信号进行解复用和对准波长,所述第三波长对准单元包括在所述中央基站中。 因此,当远程站的多路复用器/解复用器(MUX / DEMUX)的通带波长由于环境温度的变化而改变时,通过使中心基站的光源的波长对齐来执行波长跟踪, 多路复用器/解复用器和用户终端,从而最小化光信道丢失并实现WDM-PON的可靠管理。