ZnO-Coated SMS Structure Interrogated by a Fiber Ring Laser for Chemical Sensing
A zinc oxide (ZnO)-coated single mode-multimode-single mode fiber (SMS) structure interrogated by a fiber ring laser has been developed as a chemical sensor. Response to relative humidity (RH) and ethanol volatilization was evaluated by tracking the wavelength shifts of the output laser line in different moisture environments and ethanol solutions, respectively. For humidity sensing a linear response with a measurement range of 4-96% RH, and a sensitivity of 0.06 nm per %RH were obtained. As for ethanol volatilization sensing obvious wavelength blue shift was observed for the sensor immersed in 50% and 62% ethanol solution, while no variation could be detected in pure ethanol solution (purity larger than 97%). With the advantages of low cost, ease of fabrication and sensitive response, ZnO-coated SMS interrogated with a fiber ring laser was demonstrated to be an effective sensor for humidity and ethanol volatilization sensing.
X. Y. Wen et al., "ZnO-Coated SMS Structure Interrogated by a Fiber Ring Laser for Chemical Sensing," Measurement Science and Technology, vol. 25, no. 11, Institute of Physics - IOP Publishing, Oct 2014.
The definitive version is available at http://dx.doi.org/10.1088/0957-0233/25/11/114002
Electrical and Computer Engineering
Natural Science Foundation of China
Keywords and Phrases
Chemical sensors; Ethanol; Fibers; Humidity sensors; Ring lasers; Zinc oxide; Ethanol solutions; Fiber-ring lasers; Humidity sensing; Measurement range; Moisture environment; Single-mode-multimode- single-mode fiber structures; Wavelength shift; ZnO thin film; Single mode fibers; Ethanol volatilization monitoring; Fiber ring laser; Humidity sensing
International Standard Serial Number (ISSN)
Article - Journal
© 2014 Institute of Physics - IOP Publishing, All rights reserved.