发明名称 |
Integrated fiber optic strain sensing using low-coherence wavelength-encoded addressing |
摘要 |
A system is disclosed for measuring strain using a technique of detecting the optical path difference in a sensing interferometer using an interrogating interferometer including a chirped fiber Bragg grating in which the optical path difference in the sensing interferometer is changed with the strain in the sensing arm, whereas the optical path difference of the interrogating interferometer is changed only by changing the center wavelength of addressing light, making use of the wavelength-dependency on the penetration depth inside the chirped fiber Bragg grating interferometer. Consequently, strain in the sensing interferometer can be assessed by determining the wavelength in which a coherence matched condition between the sensing and interrogation interferometers is attained.
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申请公布号 |
US6289740(B1) |
申请公布日期 |
2001.09.18 |
申请号 |
US19980185027 |
申请日期 |
1998.10.26 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY |
发明人 |
POSEY, JR. RALPH;KERSEY ALAN D.;LEBLANC MICHEL J.;DAVIS MICHAEL A. |
分类号 |
G01D5/353;G01L1/24;(IPC1-7):G01L1/24 |
主分类号 |
G01D5/353 |
代理机构 |
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地址 |
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