发明名称 |
A FABRY-PEROT SENSING ELEMENT BASED ON A LARGE-DIAMETER OPTICAL WAVEGUIDE |
摘要 |
An optical sensing device including a force-applying assembly for providing a force and a Fabry-Perot (FP) element including a large-diameter waveguide having a core and having a cavity in line with the core, the cavity having reflective surfaces and having an optical path length related to the distanc e between the reflective surfaces, the FP element being coupled to the force s o that the optical path length changes according to the force, the FP element for providing an output optical signal containing information about a parameter that relates to the force. Sometimes the large-diameter waveguide is formed by collapsing a glass tube, having a bore and having an outer diamete r of about one millimeter, onto a pair of optical fibers arranged in tandem in the bore and separated by a predetermined distance, and respective end faces of the optical fibers form the cavity and are coated with a wholly or partially reflective material.
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申请公布号 |
CA2451100(A1) |
申请公布日期 |
2002.12.27 |
申请号 |
CA20022451100 |
申请日期 |
2002.06.12 |
申请人 |
WEATHERFORD/LAMB, INC. |
发明人 |
PUTNAM, MARTIN A.;KERSEY, ALAN D.;BRUCATO, ROBERT N.;FERNALD, MARK R.;SIRKIS, JAMES S. |
分类号 |
G01L1/24;G02B6/34;(IPC1-7):G01L11/02;G01D5/26 |
主分类号 |
G01L1/24 |
代理机构 |
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