发明名称 |
Method and apparatus for measuring optical distances |
摘要 |
The optical distance along a buried optical fiber (12) from a particular location (13) therealong to a central facility (10) is measured by first applying an intentional stress to the fiber in the form of a vibration signal (35) transmitted into the ground. A timing signal (36) is transmitted to the central facility (10) in synchronism with the application of the stress. Using the timing signal as a reference, the central facility can determine the time difference between when the stress was applied, and when the central facility detected the stress. From the time difference, and a knowledge of the propagation rate of the timing signal, the central facility can establish the optical distance to the particular location at which the stress was applied.
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申请公布号 |
US6148123(A) |
申请公布日期 |
2000.11.14 |
申请号 |
US19990271305 |
申请日期 |
1999.03.17 |
申请人 |
AT&T CORP |
发明人 |
ESLAMBOLCHI, HOSSEIN;HUFFMAN, JOHN SINCLAIR |
分类号 |
H04B10/08;(IPC1-7):G02B6/00 |
主分类号 |
H04B10/08 |
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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