TY - JOUR
T1 - Potential of Mechanically Induced Cascaded Long-Period Grating Structure for Reflectometric Pressure, Strain, and Temperature Sensing
AU - Das, Avik Kumar
AU - Lee, Heeyoung
AU - Noda, Kohei
AU - Mizuno, Yosuke
AU - Leung, Christopher Kin Ying
AU - Nakamura, Kentaro
N1 - Funding Information:
Manuscript received March 20, 2020; revised May 1, 2020; accepted May 5, 2020. Date of publication May 7, 2020; date of current version August 14, 2020. This work was supported in part by the JSPS KAKENHI under Grant 17H04930 and Grant 17J07226, in part by the Research Grant from the Fujikura Foundation, and in part by the Tokyo Tech Asia-Oceania Top University League on Engineering (AOTULE) Summer Program. The associate editor coordinating the review of this article and approving it for publication was Dr. Carlos Marques. (Corresponding author: Avik Kumar Das.) Avik Kumar Das and Christopher Kin Ying Leung are with the Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Hong Kong (e-mail: akdas@connect.ust.hk; ckleung@ust.hk).
Funding Information:
Avik Kumar Das would like to thank the support of his doctoral studies by the Hong Kong Research Grant Council through the Hong Kong Ph.D. Fellowship Scheme.
Publisher Copyright:
© 2020 IEEE.
PY - 2020/9/15
Y1 - 2020/9/15
N2 - We present the first report on reflectometric optical fiber sensing based on mechanically induced cascaded long-period grating (LPG) structure. This method utilizes in-house designed mechanical casings and a bare fiber. When a fiber is sandwiched between the casings and pressed by tightening screws, an LPG is induced due to a photo-elastic effect. By exploiting Fresnel refection at a fiber end, a cascaded LPG structure can be implemented using a single LPG, enabling reflectometric configuration. When this sensor is subjected to external physical processes, the attenuation bands change clearly, and their shift can be used for non-destructive evaluations. We show experimentally that this sensor can measure loads of up to 10 N without producing any permanent change in the fiber properties, indicating its pressure sensing capability. We also show that this sensor can potentially measure strain and temperature. In our experiments, the strain and temperature sensitivities are 9.4 nm/% and 0.045 nm/°C, respectively.
AB - We present the first report on reflectometric optical fiber sensing based on mechanically induced cascaded long-period grating (LPG) structure. This method utilizes in-house designed mechanical casings and a bare fiber. When a fiber is sandwiched between the casings and pressed by tightening screws, an LPG is induced due to a photo-elastic effect. By exploiting Fresnel refection at a fiber end, a cascaded LPG structure can be implemented using a single LPG, enabling reflectometric configuration. When this sensor is subjected to external physical processes, the attenuation bands change clearly, and their shift can be used for non-destructive evaluations. We show experimentally that this sensor can measure loads of up to 10 N without producing any permanent change in the fiber properties, indicating its pressure sensing capability. We also show that this sensor can potentially measure strain and temperature. In our experiments, the strain and temperature sensitivities are 9.4 nm/% and 0.045 nm/°C, respectively.
KW - Optical fiber sensors
KW - long-period gratings
KW - mechanical grating induction
KW - pressure
KW - strain
KW - temperature
UR - http://www.scopus.com/inward/record.url?scp=85089670669&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85089670669&partnerID=8YFLogxK
U2 - 10.1109/JSEN.2020.2993011
DO - 10.1109/JSEN.2020.2993011
M3 - Article
AN - SCOPUS:85089670669
SN - 1530-437X
VL - 20
SP - 10539
EP - 10546
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 18
M1 - 9089011
ER -