Strain and temperature measurement using a 9.5-m continuous chirped fiber Bragg grating with millimeter resolution

K. Fröjdh; G. Hedin; S. Helmfrid

doi:10.1117/12.2265602

23 April 2017 Strain and temperature measurement using a 9.5-m continuous chirped fiber Bragg grating with millimeter resolution

K. Fröjdh, G. Hedin, S. Helmfrid

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103238D (2017) https://doi.org/10.1117/12.2265602
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

A 9.5-m continuous chirped fiber Bragg grating (CFBG) interrogated with an optical frequency domain reflectometer is used for strain and temperature measurements. The spatial resolution is 4 mm and the noise level is 0.1 K corresponding to 1 μstrain. The strain profile is also derived from the optical reflection spectrum alone, and the results are in good agreement with the profile obtained from the optical frequency domain reflectometer. A CFBG in combination with a high-resolution interrogator can therefore enable a cost-efficient continuous strain sensor.

Citation Download Citation

K. Fröjdh, G. Hedin, and S. Helmfrid "Strain and temperature measurement using a 9.5-m continuous chirped fiber Bragg grating with millimeter resolution", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103238D (23 April 2017); https://doi.org/10.1117/12.2265602

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