Strain measurement at high temperature environment based on Fabry-Perot interferometer cascaded fiber regeneration grating
Document Type
Article
Publication Date
1-1-2016
Abstract
In this paper, a Fabry-Perot interferometer structure (FPIS) cascaded with a regenerated grating (RG) is proposed for strain measurement in a high temperature environment. The FPIS is fabricated by splicing a section of simplified hollow-core fiber (HCF) between two single-mode fibers (SMFs). Simple splicing and cleaving techniques are used to optimize the interferometer in order to produce the FPIS with the properties of lower temperature sensitivity and high strain sensitivity. The optimized FPIS is cascaded with a seed grating and then subjected to a thermal annealing process in order to activate the RG. Experimental results indicate that the proposed sensor can be used for simultaneous measurement of strain and temperature over ranges of 0 μe to 600 με and 19 °C to 600 °C, respectively, and consists of a matrix with a low condition number of 12.09.
Keywords
Fiber-optic sensors, Regeneration grating, Hollow-core fiber, Strain sensors, Temperature sensors
Divisions
PHYSICS
Funders
Natural Science Foundation of China (Nos. 61077060, 61205080, 61235005 and 61405160),National High Technology Research and Development Program863 (2009AA06Z203),Ministry of Education Project of Science and Technology Innovation(No. Z08119),Ministry of Science and Technology Project of International Cooperation (No. 2008CR1063),ShaanXi Young scientist star program 2016KJXX-04,Projects of scientific research plan of ShaanXi Education Department, No.15JK1751, Northwest University young scientist support program NJ00089,UMRG (RG326-15AFR) and PRGS (PR001-2015A)
Publication Title
Sensors and Actuators A: Physical
Volume
248
Publisher
Elsevier