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2. 发明申请

WO2009040144A1 OPTICAL AMPLIFIER 审中-公开
标题翻译：光放大器
公开(公告)号：WO2009040144A1
公开(公告)日：2009-04-02
申请号：PCT/EP2008/054987
申请日：2008-04-24
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , CAMPANELLI, Carlo , MAGRI, Roberto
发明人： CAMPANELLI, Carlo , MAGRI, Roberto
IPC分类号： H04B10/08 , H04B10/17 , G01M11/00
CPC分类号： H04B10/0777 , G01M11/3154 , G01M11/3172 , H04B10/071 , H04B10/2933
摘要： An optical amplifier for determining the attenuation of a length of optical fibre (7) to which it is adapted to be connected comprising means (5) to receive an input signal from the optical fibre (7), means (6) to output an amplified signal to the optical fibre (7), a gain medium (2) and a pump means (3) arranged to generate the amplified signal from the input signal, the amplifier (1) further comprising means (13) to measure the optical power of the signal leaving the gain medium and means (14) to measure the optical power of the signal backscattered from the optical fibre (7), wherein the pump means (3) is controlled by a control means (4), the control means (4) being adapted to modulate the pump means (3) with a determination signal, the control means (4) being adapted to change the frequency of the determination signal over a plurality of determination frequencies while keeping the amplitude of the determination signal constant, the control means (4) further being adapted to calculate the attenuation of the length of the optical fibre (7) from the length of the optical fibre (7), the effective refractive index of the fibre (7), and the power of the signal from the gain medium and the power of the backscattered signal measured at each of the plurality of determination frequencies.
摘要翻译：一种用于确定其适于连接的光纤（7）长度的衰减的光放大器，包括用于接收来自光纤（7）的输入信号的装置（5），用于输出放大信号到光纤（7），增益介质（2）和泵装置（3），其布置成从输入信号产生放大信号，放大器（1）还包括用于测量光功率的装置（13）离开增益介质的信号和用于测量从光纤（7）反向散射的信号的光功率的装置（14），其中泵装置（3）由控制装置（4）控制，控制装置（4））适于用确定信号调制所述泵装置（3），所述控制装置（4）适于在保持所述确定信号的幅度恒定的同时在多个确定频率上改变所述确定信号的频率，所述控制（4）进一步适应于计算从光纤（7）的长度，光纤（7）的有效折射率和来自增益介质的信号的功率和光纤（7）的功率的衰减在多个确定频率中的每一个测量的反向散射信号。

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