High-precision thermal expansion measurements using small Fabry-Perot etalons

2007 ◽  
Author(s):  
Mark J. Davis ◽  
Joseph S. Hayden ◽  
Daniel L. Farber
Keyword(s):  
Thermal Expansion ◽  
High Precision ◽  
Fabry Perot

Interferometric calibration of a strainmeter transducer

1971 ◽  
Vol 61 (4) ◽  
pp. 937-955
Author(s):  
Stanley Smookler ◽  
John V. Kline
Keyword(s):  
Thermal Expansion ◽  
Theoretical Analysis ◽  
Interference Pattern ◽  
Central Zone ◽  
Steel Tube ◽  
Peak Width ◽  
Strain Measurements ◽  
Fabry Perot

abstract A capacitive-strainmeter transducer is calibrated using a variable-spacing, Fabry-Perot interferometer. Optical flats are mounted on a spring parallelogram. Thermal expansion of a steel tube deforms the parallelogram, smoothly displacing one of the optical flats. This modulates the intensity of the 5016 àline, observed at the central zone of the interference pattern, and thus produces sharp peaks on a pen recorder. A theoretical analysis of the peak width, based on the work of Chabbal (1958), agrees with that recorded by the interferometer. This calibration permits earth-strain measurements to an accuracy of 1 per cent.

scholarly journals Fabry–Perot Cavity Sensing Probe with High Thermal Stability for an Acoustic Sensor by Structure Compensation

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3393 ◽  
Author(s):  
Jin Cheng ◽  
Yu Zhou ◽  
Xiaoping Zou
Keyword(s):  
Thermal Stability ◽  
Thermal Expansion ◽  
Cavity Length ◽  
High Reliability ◽  
Simple Approach ◽  
High Thermal Stability ◽  
Acoustic Sensor ◽  
Practical Applications ◽  
Fabry Perot ◽  
Expansion Model

Fiber Fabry–Perot cavity sensing probes with high thermal stability for dynamic signal detection which are based on a new method of structure compensation by a proposed thermal expansion model, are presented here. The model reveals that the change of static cavity length with temperature only depends on the thermal expansion coefficient of the materials and the structure parameters. So, fiber Fabry–Perot cavity sensing probes with inherent temperature insensitivity can be obtained by structure compensation. To verify the method, detailed experiments were carried out. The experimental results reveal that the static cavity length of the fiber Fabry–Perot cavity sensing probe with structure compensation hardly changes in the temperature range of −20 to 60 °C and that the method is highly reproducible. Such a method provides a simple approach that allows the as-fabricated fiber Fabry–Perot cavity acoustic sensor to be used for practical applications, exhibiting the great advantages of its simple architecture and high reliability.

In-fiber rectangular air fabry-perot strain sensor based on high-precision fiber cutting platform

2017 ◽  
Vol 384 ◽  
pp. 107-110 ◽  
Author(s):  
Yong Zhao ◽  
Mao-qing Chen ◽  
Ri-qing Lv ◽  
Feng Xia
Keyword(s):  
High Precision ◽  
Strain Sensor ◽  
Fabry Perot
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