BROADBAND DIGITAL TRANSMISSION SYSTEMS
    42.
    发明申请
    BROADBAND DIGITAL TRANSMISSION SYSTEMS 审中-公开
    宽带数字传输系统

    公开(公告)号:WO1985004300A1

    公开(公告)日:1985-09-26

    申请号:PCT/GB1985000108

    申请日:1985-03-20

    CPC classification number: H04L25/14 H04J3/0626

    Abstract: A broadband digital transmission system enables high bit rate data stream to be transmitted over low bit rate telephone networks. A high bit rate stream of data from a source (2) is distributed by a distributor (4) into six separate streams to provide six low bit rate streams of data. A call unit (6) establishes six channel communication with a receiver (20) and the six data streams are fed in parallel along the six channels. A reassembler (34) receives the six low bit rate streams and reconstructs them to produce the original high bit rate stream of data.

    OPTICAL FILTERS
    43.
    发明申请
    OPTICAL FILTERS 审中-公开
    光学滤波器

    公开(公告)号:WO1985002469A1

    公开(公告)日:1985-06-06

    申请号:PCT/GB1984000406

    申请日:1984-11-28

    Abstract: An optical filter is formed between the end face of an optical fibre (16) and a glass plate (32). The end face of the fibre and the face surface of the plate (32) are coated with a highly reflective coating. The fibre and plate define a Fabry-Perot cavity which transmits a particular wavelength or narrow range of wavelengths which can be detected by a photodetector (15).

    Abstract translation: 在光纤(16)的端面与玻璃板(32)之间形成滤光器。 纤维的端面和板(32)的表面涂覆有高反射涂层。 纤维和板限定了法布里 - 珀罗腔,其传送可由光电检测器(15)检测的特定波长或窄范围的波长。

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