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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
Cross-sensitivity effect in temperature-compensated sensors based on highly birefringent fibers
Applied Optics
|October 12, 2010
Summary
Temperature cross-sensitivity limits stability in fiber-optic sensors. Analyzing the ratio of cross-sensitivity to sensitivity reveals the physical limit for temperature stability in cross-spliced sensors.
Area of Science:
- Optical Engineering
- Sensor Technology
- Materials Science
Background:
- Fiber-optic sensors, particularly those using highly birefringent fibers, are susceptible to temperature variations.
- Cross-spliced sensors can exhibit measurand-temperature cross-sensitivity, affecting their operational stability.
- Understanding and quantifying this cross-sensitivity is crucial for reliable sensor performance.
Purpose of the Study:
- To analyze the impact of measurand-temperature cross-sensitivity on the temperature stability of fiber-optic cross-spliced sensors.
- To determine the physical limit for temperature stability in these sensors.
- To experimentally quantify the hydrostatic pressure-temperature cross-sensitivity coefficient in a specific fiber type.
Main Methods:
- Theoretical analysis of the relationship between cross-sensitivity and temperature stability.
- Experimental determination of the hydrostatic pressure-temperature cross-sensitivity coefficient using polarimetric and white-light interferometric methods.
- Utilized York bow-tie 800 fiber for experimental validation.
Main Results:
- The ratio of the measurand-temperature cross-sensitivity coefficient to the measurand first-order sensitivity dictates the physical limit for temperature stability.
- The hydrostatic pressure-temperature cross-sensitivity coefficient was experimentally determined for York bow-tie 800 fiber.
- An estimation of the achievable temperature stability limit for cross-spliced pressure sensors under environmental temperature fluctuations was made.
Conclusions:
- The identified ratio is a key parameter for assessing and improving temperature stability in fiber-optic cross-spliced sensors.
- Experimental data provides a basis for predicting the performance limits of pressure sensors in variable temperature environments.
- This research contributes to the development of more robust and stable fiber-optic sensing solutions.
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