TY - JOUR
T1 - Adaptive filter-based interrogation of high-sensitivity fiber optic Fabry-Perot interferometry sensors
AU - Tosi, Daniele
AU - Poeggel, Sven
AU - Leen, Gabriel
AU - Lewis, Elfed
PY - 2014/2/1
Y1 - 2014/2/1
N2 - A novel method for interrogation of fiber-optic Fabry-Perot interferometric (FPI) sensors arranged in a white-light setup is presented. The proposed approach is based on a recursive least square (RLS) adaptive filtering to estimate the length of the Fabry-Perot cavity. Applied to an extrinsic FPI sensor with 1.6 nm/kPa sensitivity, the interrogation method achieves pressure accuracy of 6.1 Pa (0.045 mmHg), with an improvement of 8.7 times over standard Q-point tracking method at no computational expense. The RLS-based algorithm also exhibits better resilience to low signal-to-noise ratio (SNR) conditions, achieving 0.87 mmHg accuracy for SNR = -5.0 dB. The proposed approach finds its best application in medical pressure sensors, for sub-mmHg in vivo pressure detection, and is based on a biocompatible FPI design.
AB - A novel method for interrogation of fiber-optic Fabry-Perot interferometric (FPI) sensors arranged in a white-light setup is presented. The proposed approach is based on a recursive least square (RLS) adaptive filtering to estimate the length of the Fabry-Perot cavity. Applied to an extrinsic FPI sensor with 1.6 nm/kPa sensitivity, the interrogation method achieves pressure accuracy of 6.1 Pa (0.045 mmHg), with an improvement of 8.7 times over standard Q-point tracking method at no computational expense. The RLS-based algorithm also exhibits better resilience to low signal-to-noise ratio (SNR) conditions, achieving 0.87 mmHg accuracy for SNR = -5.0 dB. The proposed approach finds its best application in medical pressure sensors, for sub-mmHg in vivo pressure detection, and is based on a biocompatible FPI design.
KW - Adaptive filter
KW - Extrinsic Fabry-Perot interferometry (EFPI)
KW - Fiber optic sensors (FOS)
KW - Fiber-optic pressure sensor
KW - Pressure sensor
KW - Recursive least square (RLS)
UR - http://www.scopus.com/inward/record.url?scp=84891515904&partnerID=8YFLogxK
U2 - 10.1016/j.sna.2013.12.010
DO - 10.1016/j.sna.2013.12.010
M3 - Article
AN - SCOPUS:84891515904
SN - 0924-4247
VL - 206
SP - 144
EP - 150
JO - Sensors and Actuators, A: Physical
JF - Sensors and Actuators, A: Physical
ER -