Title
A fast response intrinsic humidity sensor based on an etched singlemode polymer fiber Bragg grating
RIS ID
102615
Abstract
A simple, low cost and fast response time intrinsic relative humidity sensor system based on an etched singlemode polymer fiber Bragg (POFBG)is presented in this paper. A macro-bend linear edge filter which converts the humidity induced wavelength shift into an intensity change is used as the interrogation technique. The singlemode POFBG is etched to micro-meters in diameter to improve the response time of the humidity sensor. A response time of 4.5 s is observed for a polymer FBG with a cladding diameter of 25 m. The overall sensor system sensitivity was 0.23 mV/%RH. The etched POFBG humidity sensor shows anexponential decrease in response time with a decrease in fiber diameter. The developed sensor might have potential applications in a wide range of applications where fast and accurate real time humidity control is required.
Publication Details
G. Rajan, M. Yusof Mohd. Noor, B. Liu, E. Ambikairajah, D. J. Webb & G. Peng, "A fast response intrinsic humidity sensor based on an etched singlemode polymer fiber Bragg grating," Sensors and Actuators A: Physical, vol. 203, pp. 107-111, 2013.