Title of article
Polyvinyl alcohol coated photonic crystal optical fiber sensor for humidity measurement
Author/Authors
Wong، نويسنده , , Wei Chang and Chan، نويسنده , , Chi Chiu and Chen، نويسنده , , Li Han and Li، نويسنده , , Tao-Chen Lee، نويسنده , , Kok Xian and Leong، نويسنده , , Kam Chew، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2012
Pages
7
From page
563
To page
569
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.
Keywords
Polymer swelling , Interferometer , Polyvinyl alcohol , Cladding mode excitation , Optical device , Humidity , optical fiber sensor , Photonic crystal fiber
Journal title
Sensors and Actuators B: Chemical
Serial Year
2012
Journal title
Sensors and Actuators B: Chemical
Record number
1441174
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