发明名称 |
Monitoring of optical communications fibres |
摘要 |
In a device for detecting the presence of a bend (5) used for the illicit tapping of communications through an optical fibre (1) a pilot beam of different frequency from the communications beam is generated by a source (8) and the relative attenuation of the two beams is measured at the receiving end. A change indicates the presence of a bend. <IMAGE>
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申请公布号 |
GB8600583(D0) |
申请公布日期 |
1994.03.09 |
申请号 |
GB19860000583 |
申请日期 |
1986.01.10 |
申请人 |
HARRIS ALUN J.;CASTLE PETER F. |
发明人 |
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分类号 |
H04B10/00;H04B10/02;H04B10/08;H04B10/12;H04B10/85 |
主分类号 |
H04B10/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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