Development of fibre Bragg grating based strain/temperature sensing system

S. G. Raymond; P. Wagner; M. Panczyk; G. V. M. Williams; K. J. Stevens; I. Monfils; D. Hirst; J. Whaanga; Y. Kutuvantavida; M. D. H. Bhuiyan; A. J. Kay

doi:10.1117/12.909344

20 February 2012 Development of fibre Bragg grating based strain/temperature sensing system

S. G. Raymond, P. Wagner, M. Panczyk, G. V. M. Williams, K. J. Stevens, I. Monfils, D. Hirst, J. Whaanga, Y. Kutuvantavida, M. D. H. Bhuiyan, A. J. Kay

Author Affiliations +

Proceedings Volume 8258, Organic Photonic Materials and Devices XIV; 82581L (2012) https://doi.org/10.1117/12.909344
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

We have characterised a strain and temperature sensing system being developed by Southern Photonics that uses a new Optical Interrogator and fibre Bragg gratings. We have determined the key strain and temperature coefficients, and shown that strain and temperature can be measured simultaneously. The experimental uncertainty is 5.2 pm when using the 1540 nm fibre Bragg grating, which corresponds to an experimental uncertainty in measuring the temperature of 0.54 ºC and in measuring the strain of 3.4 με. Simulations predict that a Bragg reflection of more than 90% can be achieved for Bragg Gratings in polymer thin films containing chromophores for grating lengths as small as 200 μm. A small Bragg grating length means that it should be possible to create waveguides and four Bragg gratings for strain tensor and temperature measurements within an area as small as 5×5 mm².

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S. G. Raymond, P. Wagner, M. Panczyk, G. V. M. Williams, K. J. Stevens, I. Monfils, D. Hirst, J. Whaanga, Y. Kutuvantavida, M. D. H. Bhuiyan, and A. J. Kay "Development of fibre Bragg grating based strain/temperature sensing system", Proc. SPIE 8258, Organic Photonic Materials and Devices XIV, 82581L (20 February 2012); https://doi.org/10.1117/12.909344

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