Simultaneous Measurement of Humidity and Temperature Based on an SiO2-Nanospheres Film Deposited on a Long-Period Grating In-Line With a Fiber Bragg Grating

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Viegas, D (Author) Other; Hernaez, M (Author) Other; Goicoechea, J (Author) Other; Santos, JL (Author) FCUP; Araujo, FM (Author) Other; Arregui, F (Author) Other; Matias, IR (Author) Other

Journal

Title: IEEE Sensors Journal

Vol. 11

Pages: 162-166

ISSN: 1530-437X

Publisher: IEEE

Indexing

ISI Web of Knowledge - 36 Citations

Scopus - 46 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-002-YQ3

DOI: 10.1109/jsen.2010.2055237

Abstract (EN): A novel configuration able to measure simultaneously relative humidity and temperature is proposed. The sensing head is based on a long-period fiber grating (LPG) coated with silica nanospheres in-line with a fiber Bragg grating. The polymeric overlay that changes its optical properties when exposed to different humidity levels is deposited onto the LPG using the electrostatic self-assembly technique (ESA), resulting into a humidity-induced shift of the resonance wavelength of the LPG. Considering the humidity range from 20% to 50% RH, a system resolution of 1.6% RH and 2.5 degrees C was achieved. At higher humidity, from 50% to 80% RH, the corresponding resolution values were 2.4% RH and 0.4 degrees C.

Language: English

Type (Professor's evaluation): Scientific