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1. 发明公开

EP1429477A3 Optical power measuring system, terminal station and repeater therefor 审中-公开
标题翻译：光功率测量系统，终端站和中继器
公开(公告)号：EP1429477A3
公开(公告)日：2005-02-02
申请号：EP04002463.0
申请日：1998-08-12
申请人： Kokusai Denshin Denwa Kabushiki Kaisha
发明人： Horiuchi, Yukio c/o Kokusai Denshin , Yamamoto, Shu c/o Kokusai Denshin , Akiba, Shigeyuki c/o Kokusai Denshin
IPC分类号： H04B10/08 , H04J14/02
CPC分类号： H04B10/07955 , H04B10/0775 , H04B10/0779 , H04B10/0799 , H04B2210/075 , H04B2210/078
摘要： An oscillator oscillates at a predetermined reference frequency, and a reference signal light sender generates light (reference signal light) of a specific wavelength deeply modulated by output from the oscillator. A frequency divider frequency-divides the output from the oscillator into a certain number, and outputs a tone signal of a predetermined measurement frequency. Output from the frequency divider is applied to selected one of a plurality of optical transmission signal senders via one of a plurality of switches, and is used to slightly intensity-modulate a corresponding optical transmission signal. An optical divider in an optical repeater outputs most of output light from an optical amplifier onto an optical fiber transmission line toward a terminal station, and applies small amounts of the light to a measuring circuit. The measuring circuit synchronously detects the measurement frequency component in the received light using the reference frequency obtained from the reference signal light of the specific wavelength. A modulator slightly varies the amplification gain of the other optical amplifier that amplifies the signal light travelling on the other optical fiber transmission line in response to results of measurement by the measuring circuit.
摘要翻译：振荡器以预定的参考频率振荡，参考信号光发射器产生由振荡器输出深度调制的特定波长的光（参考信号光）。分频器将来自振荡器的输出分频成一定数量，并输出预定测量频率的音调信号。来自分频器的输出经由多个开关中的一个被施加到多个光发送信号发送器中所选择的一个，并且被用于对相应的光发送信号进行轻微的强度调制。光中继器中的分光器将来自光放大器的大部分输出光输出到光纤传输线路上，并将少量光线照射到测量电路。测量电路使用从特定波长的参考信号光获得的参考频率来同步地检测接收到的光中的测量频率分量。根据测量电路的测量结果，调制器略微改变放大在另一条光纤传输线上传播的信号光的另一个光放大器的放大增益。

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