发明名称 |
HYDROGEN-RESISTANT OPTICAL FIBER/GRATING STRUCTURE SUITABLE FOR USE IN DOWNHOLE SENSOR APPLICATIONS |
摘要 |
<p>A hydrogen-resistant optical fiber particularly well-suitable for downhole applications comprises a relatively thick pure silica core and a depressed-index cladding layer. Interposed between the depressed-index cladding layer and the core is a relatively thin germanium-doped interface. By maintaining a proper relationship between the pure silica core diameter and the thickness of the germanium-doped interface, a majority (preferably, more than 65%) of the propagating signal can be confined within the pure silica core and, therefore, be protected from hydrogen-induced attenuation problems associated with the presence of germanium (as is common in downhole fiber applications). The hydrogen-resistant fiber of the present invention can be formed to include one or more Bragg gratings within the germanium-doped interface, useful for sensing applications.</p> |
申请公布号 |
WO2008147712(A1) |
申请公布日期 |
2008.12.04 |
申请号 |
WO2008US63738 |
申请日期 |
2008.05.15 |
申请人 |
BAKER HUGHES INCORPORATED;HOMA, DANIEL, S.;CHILDERS, BROOKS |
发明人 |
HOMA, DANIEL, S.;CHILDERS, BROOKS |
分类号 |
G02B6/02;C03C13/04 |
主分类号 |
G02B6/02 |
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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