发明名称 |
PHASE MODULATOR FOR FIBER-OPTIC SENSORS PHASE MODULATOR FOR FIBER-OPTIC SENSORS |
摘要 |
<p>A piezoelectric phase modulator for a fiber optic sensor is disclosed. The disclosed modulator is capable of relatively large amplitude mechanical vibrations, i.e., having a large converse piezoelectric effect, while at the same time having a relatively predictable and well-behaved direct piezoelectric effect. This result is accomplished by bonding a relatively active piezoelectric material, such as PZT, to a relatively stable piezoelectric material, such as quartz. An optical fiber may then be bonded to the relatively stable material, or to a structure attached thereto, as part of a fiber optic sensor loop. Excitation of the relatively active piezoelectric material will then produce a mechanical vibration in the relatively stable material and in the attached fiber comparable in magnitude to that experienced by the active material. Several embodiments of the invention are shown which are illustrative of devices which may be made according to the teachings disclosed.</p> |
申请公布号 |
EP0214081(A3) |
申请公布日期 |
1988.09.21 |
申请号 |
EP19860630127 |
申请日期 |
1986.08.18 |
申请人 |
UNITED TECHNOLOGIES CORPORATION |
发明人 |
FOURNIER, JOSEPH THEOPHILE, JR.;SWARTS, ROBERT ELLIS |
分类号 |
G01C19/64;G01C19/72;G01D5/353;G01H9/00;G02F1/01;(IPC1-7):G02F1/055;G02B26/06;G01D5/26 |
主分类号 |
G01C19/64 |
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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