Hoi , Pham Van and Binh, Pham Thanh and Anh, Pham Tran Tuan and Vinh, Ha Xuan and Ha, Chu Thi Thu and Trang, Nguyen Thu (2008) Spectra profile expansion of Bragg wavelength on nano-particle embedded fiber-Bragg-grating. SENSORS AND ACTUATORS A-PHYSICAL .
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This article presents the results of a detailed study on the effects of spectra profile expansion of Bragg wavelength on the performance of the nano-particle embedded fiber-Bragg-grating (nano-EFBG) for sensing applications. The fiber-Bragg- grating (FBG) was coated by CdSe-nano-particle layers with various thicknesses (600-2000 nm) and bonded on substrates of epoxy or epoxy/Teflon with a large thermal expansion coefficient. With this embedding method, a variation of the line-width expansion of Bragg wavelength with cooling down FBG has been controlled. The nano-EFBG morphology was investigated by FE-SEM and the nano-EFBG sensors are studied in ambient from 77 K (liquid nitrogen) to 393 K. The expansion of spectral profile, which caused by transverse loading from nano-particle/epoxy layers, can be changed in the range of 0.1-1.3 nm between before and after cooling down. This result is for the strain-temperature sensors, but has the potential application in the FBG dispersion compensation devices and many other measurands. (C) 2007 Elsevier B.V. All rights reserved.
|Subjects:||Physical Science > Nano objects|
Analytical Science > Nanotechnology for sensing and actuating
|Deposited On:||21 Feb 2010 09:21|
|Last Modified:||21 Feb 2010 09:21|
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