TY - JOUR
T1 - Temperature-Insensitive Refractometer Based on a Wave-Shaped Fiber Modal Interferometer Using No-Core Fiber
AU - Kim, Taeyoon
AU - Jung, Junha
AU - Lee, Jinho
AU - Lim, Geun Weon
AU - Lee, Ju Han
N1 - Publisher Copyright:
© 2001-2012 IEEE.
PY - 2021/7/15
Y1 - 2021/7/15
N2 - We propose a novel, temperature-insensitive fiber optic sensor for refractive index (RI) measurement. Our refractometer is based on multimodal interference in a wave-shaped configuration with localized reverse curvature, which is composed of a concatenating standard single-mode fiber (SMF)-no-core fiber (NCF)-SMF structure. The wave-shaped fiber optic refractometer is composed of an SMF-NCF-SMF combination, in which the length of the NCF located at the top of the structure, is only 4 mm. The main wave-shaped fiber has a curvature of 20 m-1, while the wave-shaped NCF section has a curvature of -0.0055 m-1. The NCF section with no polymer coating, which acts as a sensing head, is modified to have a curvature opposite to the curvature of the whole wave-shaped optical fiber, by applying localized external pressure. The RI measurement sensitivity of our proposed refractometer was estimated at approximately -53.24 nm/RIU, while its temperature sensitivity was 0 pm/°C.
AB - We propose a novel, temperature-insensitive fiber optic sensor for refractive index (RI) measurement. Our refractometer is based on multimodal interference in a wave-shaped configuration with localized reverse curvature, which is composed of a concatenating standard single-mode fiber (SMF)-no-core fiber (NCF)-SMF structure. The wave-shaped fiber optic refractometer is composed of an SMF-NCF-SMF combination, in which the length of the NCF located at the top of the structure, is only 4 mm. The main wave-shaped fiber has a curvature of 20 m-1, while the wave-shaped NCF section has a curvature of -0.0055 m-1. The NCF section with no polymer coating, which acts as a sensing head, is modified to have a curvature opposite to the curvature of the whole wave-shaped optical fiber, by applying localized external pressure. The RI measurement sensitivity of our proposed refractometer was estimated at approximately -53.24 nm/RIU, while its temperature sensitivity was 0 pm/°C.
KW - Optical fiber sensors
KW - multimodal Interference
KW - refractive index measurement
KW - temperature insensitive
UR - http://www.scopus.com/inward/record.url?scp=85105111926&partnerID=8YFLogxK
U2 - 10.1109/JSEN.2021.3075473
DO - 10.1109/JSEN.2021.3075473
M3 - Article
AN - SCOPUS:85105111926
SN - 1530-437X
VL - 21
SP - 16066
EP - 16077
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 14
M1 - 9415743
ER -