TY - JOUR
T1 - Accelerometer Employing a Side-Hole Fiber in a Sagnac Interferometer
AU - Htein, Lin
AU - Gunawardena, Dinusha Serandi
AU - Chung, Weng Hong
AU - Au, Ho Yin
AU - Tam, Hwa Yaw
N1 - Funding Information:
Manuscript received December 1, 2020; revised January 9, 2021; accepted January 28, 2021. Date of publication February 2, 2021; date of current version May 16, 2021. This work was supported by the CNERC Project (K-BBY1, 1-BBV2, and BBVH). (Corresponding author: Dinusha Serandi Gunawardena.) Lin Htein, Dinusha Serandi Gunawardena, Weng-Hong Chung, and Ho-Yin Au are with Photonics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong (e-mail: [email protected]; [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 1983-2012 IEEE.
PY - 2021/5/15
Y1 - 2021/5/15
N2 - An optical accelerometer realized with a new side-hole fiber in a Sagnac interferometric scheme, was developed by utilizing the birefringent and stiffness properties of the optical fiber to achieve a high sensitivity, a broad frequency range, a wide acceleration range, and an excellent linearity. The proposed accelerometer exhibits a resonant frequency of 2300 Hz and an average sensitivity of 44.3 (±3.0) pm/g over a broad frequency range from 4 to 900 Hz. The linearity of the signal response exceeds 99.9% and its transverse sensitivity is less than 11% of the main axis. It exhibits a dynamic acceleration range of 62.5 dB which is related to the applied acceleration from 0.03 to 40 g, making the side-hole fiber a good candidate for acceleration/vibration sensing applications. Furthermore, the tradeoff relationship between the sensitivity and the resonant frequency was significantly improved when compared to that of fiber Bragg grating-based accelerometers.
AB - An optical accelerometer realized with a new side-hole fiber in a Sagnac interferometric scheme, was developed by utilizing the birefringent and stiffness properties of the optical fiber to achieve a high sensitivity, a broad frequency range, a wide acceleration range, and an excellent linearity. The proposed accelerometer exhibits a resonant frequency of 2300 Hz and an average sensitivity of 44.3 (±3.0) pm/g over a broad frequency range from 4 to 900 Hz. The linearity of the signal response exceeds 99.9% and its transverse sensitivity is less than 11% of the main axis. It exhibits a dynamic acceleration range of 62.5 dB which is related to the applied acceleration from 0.03 to 40 g, making the side-hole fiber a good candidate for acceleration/vibration sensing applications. Furthermore, the tradeoff relationship between the sensitivity and the resonant frequency was significantly improved when compared to that of fiber Bragg grating-based accelerometers.
KW - Accelerometers
KW - birefringence
KW - optical fiber sensors
KW - Sagnac interferometers
UR - http://www.scopus.com/inward/record.url?scp=85100742941&partnerID=8YFLogxK
U2 - 10.1109/JLT.2021.3056474
DO - 10.1109/JLT.2021.3056474
M3 - Journal article
AN - SCOPUS:85100742941
SN - 0733-8724
VL - 39
SP - 3303
EP - 3311
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 10
M1 - 9345409
ER -