首页>
外国专利>
Fibre-optic sensor in the form of a fabry-perot interferometer having one or both reflecting elements made as a bragg grating
Fibre-optic sensor in the form of a fabry-perot interferometer having one or both reflecting elements made as a bragg grating
展开▼
机译:法布里-珀罗干涉仪形式的光纤传感器,具有一个或两个反射元件制成布拉格光栅
展开▼
页面导航
摘要
著录项
相似文献
摘要
The present invention relates to a fibre-optic sensor in the form of a Fabry-Pérot interferometer having one or both beam-reflecting elements designed as a Bragg grating (BG). What especially distinguishes the invention is that the chirp function of at least one Bragg grating is balanced against one non-desired measurand, such that the shift of the centre (xr) of the reflection which is a result of the variation of the non-desired measurand exactly compensates for the optical path difference which this measurand generates in the interferometer. This can be carried out by the chirp function having the form LAMBDA 0(x) = lambda 0/2n0 (1+Ax/BL0-Cx), wherein A, B and C are constants which are determined analytically or experimentally for each different case of desired invariance.
展开▼