TY - JOUR
T1 - Implementation and characterization of liquid-level sensor based on a long-period fiber grating Mach-Zehnder interferometer
AU - Fu, Hongyan
AU - Shu, Xuewen
AU - Zhang, Aping
AU - Liu, Weisheng
AU - Zhang, Lin
AU - He, Sailing
AU - Bennion, Ian
N1 - Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/11
Y1 - 2011/11
N2 - An optical liquid-level sensor (LLS) based on a long-period fiber grating (LPG) interferometer is proposed and experimentally demonstrated. Two identical 3-dB LPGs are fabricated to form an in-fiber Mach-Zehnder interferometer, and the fiber portion between two LPGs is exposed to the liquid as the sensing element. The sensitivity and measurement range of the sensors employing different orders of cladding modes are investigated both theoretically and experimentally. The experimental results show good linearity and large measurement range. One of the significant advantages of such a sensing structure is that the measurement level is not limited to the length of the LPG itself. Also, the measurement range and sensitivity of the proposed LLS can be readily tailored for a particular applications.
AB - An optical liquid-level sensor (LLS) based on a long-period fiber grating (LPG) interferometer is proposed and experimentally demonstrated. Two identical 3-dB LPGs are fabricated to form an in-fiber Mach-Zehnder interferometer, and the fiber portion between two LPGs is exposed to the liquid as the sensing element. The sensitivity and measurement range of the sensors employing different orders of cladding modes are investigated both theoretically and experimentally. The experimental results show good linearity and large measurement range. One of the significant advantages of such a sensing structure is that the measurement level is not limited to the length of the LPG itself. Also, the measurement range and sensitivity of the proposed LLS can be readily tailored for a particular applications.
UR - http://www.scopus.com/inward/record.url?scp=80055027640&partnerID=8YFLogxK
UR - http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5753906
U2 - 10.1109/JSEN.2011.2145416
DO - 10.1109/JSEN.2011.2145416
M3 - Article
AN - SCOPUS:80055027640
SN - 1530-437X
VL - 11
SP - 2878
EP - 2882
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 11
ER -