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Title: Polyvinyl alcohol coated photonic crystal optical fiber sensor for humidity measurement
Authors: Wong, Wei Chang
Chan, Chi Chiu
Chen, Li Han
Li, Tao
Lee, Kok Xian
Leong, Kam Chew
Keywords: DRNTU::Engineering::Chemical engineering
Issue Date: 2012
Source: Wong, W. C., Chan, C. C., Chen, L. H., Li, T., Lee, K. X., & Leong, K. C. (2012). Polyvinyl alcohol coated photonic crystal optical fiber sensor for humidity measurement. Sensors and Actuators B: Chemical, 174, 563-569.
Series/Report no.: Sensors and actuators B: chemical
Abstract: A polyvinyl alcohol (PVA) coated photonic crystal optical fiber (PCF) sensor has been proposed as a relative humidity (RH) sensor. It was fabricated by collapsing the holes of PCF at both ends to form a Michelson interferometer with cladding mode excitation. PVA was dip coated onto the sensor and the interference shift was measured when the sensor was exposed to varying RH. The sensor with 9% (w/w) coating showed a high sensitivity of 0.60 nm/%RH, displayed little hysteresis, high repeatability, low cross-sensitivity to temperature and ammonia gas and stability over 7 days of testing. A rise/fall time of 300/500 ms was achieved respectively.
ISSN: 0925-4005
DOI: 10.1016/j.snb.2012.07.032
Rights: © 2012 Elsevier B.V.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

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