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. 2017 Nov 30;17(12):2773.
doi: 10.3390/s17122773.

Study of Optical Fiber Sensors for Cryogenic Temperature Measurements

Veronica De Miguel-Soto  1 , Daniel Leandro  2 , Aitor Lopez-Aldaba  3 , Juan Jesus Beato-López  4 , José Ignacio Pérez-Landazábal  5   6 , Jean-Louis Auguste  7 , Raphael Jamier  8 , Philippe Roy  9 , Manuel Lopez-Amo  10
Affiliations

Study of Optical Fiber Sensors for Cryogenic Temperature Measurements

Veronica De Miguel-Soto et al. Sensors (Basel). .

Abstract

In this work, the performance of five different fiber optic sensors at cryogenic temperatures has been analyzed. A photonic crystal fiber Fabry-Pérot interferometer, two Sagnac interferometers, a commercial fiber Bragg grating (FBG), and a π-phase shifted fiber Bragg grating interrogated in a random distributed feedback fiber laser have been studied. Their sensitivities and resolutions as sensors for cryogenic temperatures have been compared regarding their advantages and disadvantages. Additionally, the results have been compared with the given by a commercial optical backscatter reflectometer that allowed for distributed temperature measurements of a single mode fiber.

Keywords: cryogenic temperature; interferometric sensor; optical backscatter reflectometer; optical fiber sensor; random distributed feedback fiber lasers; thermometry.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Schematic setup.
Figure 2
Figure 2
Photographs of the setup: (a) placement of the sensors used in the experiment; (b) placement of the fiber used for distributed measurements.
Figure 3
Figure 3
Four-bridge double-Y-shape-core microstructured optical fiber (MOF).
Figure 4
Figure 4
Fiber based Fabry-Pérot (PCF-FP) sensor: (a) Optical spectrum and (b) its fast Fourier transform (FFT) module.
Figure 5
Figure 5
Sagnac interferometers: (a) Optical spectrum and (b) its FFT module.
Figure 6
Figure 6
Schematic diagram of the proposed random distributed feedback fiber laser (RDFB-RL) using a π-phase shifted fiber Bragg grating (PSFBG) sensor.
Figure 7
Figure 7
Trace detected by the optical backscatter reflectometer (OBR).
Figure 8
Figure 8
(a) Interferometric; (b) Wavelength selective fiber optic sensors response versus temperature.
Figure 9
Figure 9
Fiber optic sensors response versus temperature above 0 °C.
Figure 10
Figure 10
Example of optical backscatter reflectometer (OBR) traces: distributed temperature sensing. R1 to R4 represent the reference points (see also Figure 2b).
Figure 11
Figure 11
Temperature evolution at the reference points measured with the OBR versus thermocouple temperature.
See this image and copyright information in PMC

References

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