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- Title
Highly Integrated All-Fiber FP/FBG Sensor for Accurate Measurement of Strain under High Temperature.
- Authors
Yang, Tingting; He, Xiu; Ran, Zengling; Xie, Zhendong; Rao, Yunjiang; Qiao, Xueguang; He, Zhengxi; He, Peng
- Abstract
Accurate measurement of strain is one of the most important issues for high temperature environments. We present a highly integrated all-fiber sensor to achieve precise measurements of strain/high-pressure, which consists of a fiber Bragg grating (FBG) inscribed by an 800 nm femtosecond laser cascaded with a micro extrinsic Fabry–Perot (FP) cavity fabricated by the 157 nm laser micromachining technique. FBG is sensitive to temperature, but insensitive to strain/pressure, whereas the FP is sensitive to strain/pressure, but has a small dependence on temperature. Therefore, such a cascaded sensor could be used for dual-parameter measurement and can work well at high temperatures. Experimental results indicate that this device exhibits a good strain characteristic at high temperatures and excellent high-pressure performance at room temperature. Due to its highly sensitive wavelength response, the proposed sensor will have remarkable potential applications in dual parameter sensing in harsh environments.
- Subjects
BRAGG gratings; MICROMACHINING; STRAINS &; stresses (Mechanics); HIGH temperatures; WAVELENGTHS
- Publication
Materials (1996-1944), 2018, Vol 11, Issue 10, p1867
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma11101867