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    • 1. 发明申请
    • COMMUNICATION SYSTEM, TRANSMITTER APPARATUS AND RECEIVER APPARATUS
    • 通信系统,发射机设备和接收机设备
    • US20140211814A1
    • 2014-07-31
    • US14236557
    • 2012-09-25
    • NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    • Junichi AbeKiyoshi Kobayashi
    • H04J4/00
    • H04J4/00H04B1/69H04L27/2626H04L27/2636H04L27/2647
    • A transmitter of a communication system includes a spectrum dividing section which divides a transmission signal into a plurality of sub-spectra at a first sampling speed F1 and combines one or more low-speed intermediate composite signals from the divided sub-spectra, and a multiplexing section which multiplexes the intermediate composite signals at a second sampling speed F2 faster than the first sampling speed F1 (F2>F1) and distributes to a broadband. A receiver includes a demultiplexing section which extracts one or more low-speed intermediate composite signals from a reception signal at the second sampling speed F2, and a spectrum combining section which combines the intermediate composite signals at the first sampling speed F1 and extracts the sub-spectra to re-combines the transmission signal.
    • 通信系统的发射机包括频谱分割部分,其以第一采样速度F1将传输信号分成多个子频谱,并且组合来自分割子频谱的一个或多个低速中间复合信号,以及复用 该部分以比第一采样速度F1(F2> F1)更快的第二采样速度F2复用中间复合信号并分配到宽带。 接收机包括从第二采样速度F2的接收信号中提取一个或多个低速中间复合信号的解复用部分,以及以第一采样速度F1组合中间复合信号的频谱组合部分, 光谱重新组合传输信号。
    • 10. 发明公开
    • OPTICAL MONITOR DEVICE
    • US20240230464A1
    • 2024-07-11
    • US18288988
    • 2021-05-28
    • NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    • Ryo KOYAMAYoshiteru ABEKazunori KATAYAMA
    • G01M11/00G01M11/02
    • G01M11/37G01M11/0207
    • The present disclosure aims to reduce the size and cost of this optical monitoring device that detects the intensity of light propagating through an optical fiber.
      The present disclosure relates to an optical monitoring device for detecting the intensity of light propagating through an optical fiber, the optical monitoring device comprising an optical component that branches part of incident light in a first direction and branches the rest in a second direction at a specific branching ratio and emits the light, wherein the optical component includes: a single-layer film having a uniform thickness; an incident-side member provided on the incident side of the single-layer film; and an outgoing-side member provided on the outgoing side of the single-layer film, a first refractive index interface between the single-layer film and the incident-side member and a second refractive index interface between the single-layer film and the outgoing-side member are provided at a specific angle with an optical axis of the incident light, the first direction is a direction in which the light transmits through the first refractive index interface and the second refractive index interface, and the second direction is a direction in which the light is reflected on the first refractive index interface and the second refractive index interface.