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首页> 美国政府科技报告 >Investigation of Fabry-Perot Fibre Grating Sensors (Undersoekning av Fabry-Perot211 Fibergitter Sensorer)
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Investigation of Fabry-Perot Fibre Grating Sensors (Undersoekning av Fabry-Perot211 Fibergitter Sensorer)

机译：法布里 - 珀罗光纤光栅传感器的研究（Undersoekning av Fabry-perot211 Fibergitter sensorer）

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In this work three Fabry-Perot Fibre Grating (FPFG) interferometers, fabricated211u001eat the Institute of Optical Research (IOF) in Stockholm, were tested and 211u001eanalyzed. Their transmission properties as a function of strain were 211u001echaracterized and compared to theoretical derivations based on coupled-mode 211u001etheory. The measured characteristics of the FPFG-interferometer were in good 211u001eagreement with the theory, although one of the interferometers gave unexpected 211u001eresults. A method to provide increased phase resolution using two phase shifted 211u001eFPFG-interferometers was tested. In this case the optimum choice of the grating 211u001ereflection and the phase shift between the interferometers were found to be 23 211u001epercent and radians, respectively. The relative phase stability for the two 211u001einterfermoeters in such an arrangement is a critical parameter which was 211u001einvestigated. The arrangement was subjected to strain and temperature variations 211u001eand it was found that the relative phase changed. Suggestions of ways to reduce 211u001ethis drift are given.

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