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    • 2. 发明申请
    • Optical fiber network system transmission method, optical fiber network system thereof, and central unit thereof
    • 光纤网络系统传输方法,其光纤网络系统及其中心单元
    • US20050058390A1
    • 2005-03-17
    • US10489609
    • 2002-09-19
    • Masashi Iwai
    • Masashi Iwai
    • H04B10/27H04B10/272H04B10/278H04B10/54H04B10/548H04B10/572H04J14/00H04J14/02H04L12/44H04N7/14G02B6/26
    • H04B10/272
    • A passive optical network (PON) comprising optical fibers and optical couplers. An central equipment 10 comprises a hub 16, plural modems 17, a mixer 18, and a splitter 19. Carrier waves of a predetermined frequency are assigned to the plural modems 17 and each customer equipment 60. In the downstream, the hub 16 selects each modem 17 (that is, each customer equipment 60) and converts the assigned carrier wave into modulated signals. The modulated signals are mixed in the mixture 18, converted into frequency-multiplexed signals, and transmitted through a first optical coupler 52 to the customer equipment 60. Each customer equipment 60 demodulates the signals by using carrier waves of the assigned frequency. In the upstream, a first optical coupler 53 converts signals from each customer equipment 60 into frequency-multiplexed signals and transmits to the central equipment 10. In the central equipment 10, the splitter 19 branches the signals per each carrier wave of the assigned wavelength, and each modem 17 demodulates the signals. As a result, a passive optical network (PON) is realized.
    • 包括光纤和光耦合器的无源光网络(PON)。 中央设备10包括集线器16,多个调制解调器17,混合器18和分离器19.预定频率的载波被分配给多个调制解调器17和每个客户设备60.在下游,集线器16选择每个 调制解调器17(即,每个客户设备60),并将所分配的载波转换成调制信号。 调制信号在混合物18中混合,转换为频率复用信号,并通过第一光耦合器52发送到客户设备60.每个客户设备60通过使用分配频率的载波来解调信号。 在上游,第一光耦合器53将来自每个客户设备60的信号转换为频率复用信号,并将其发送到中央设备10.在中央设备10中,分离器19每分配波长的每个载波分支信号, 并且每个调制解调器17解调信号。 结果,实现了无源光网络(PON)。