TY - JOUR
T1 - Ultrasensitive refractive index and temperature sensor based on D-shaped photonic crystal fiber by group birefringence response in a Sagnac interferometer
AU - Li, Zefeng
AU - Yuan, Jinhui
AU - Rao, Lan
AU - Yan, Binbin
AU - Wang, Kuiru
AU - Sang, Xinzhu
AU - Wu, Qiang
AU - Yu, Chongxiu
PY - 2024/9/1
Y1 - 2024/9/1
N2 - In this paper, a D-shaped photonic crystal fiber (PCF) sensor based on a Sagnac interferometer is proposed, and it can achieve ultrahigh refractive index (RI) and temperature sensitivity when operating around the turning point of group birefringence (B
g). We undertake a theoretical analysis on B
g and a simulation calculation to study the sensing characteristics and obtain the optimized structure parameters of the D-shaped PCF sensor. The simulation results show that the maximum average RI sensitivities can reach 3253.33 and 15500nm/RIU in the RI range of 1.33 to 1.35 and 1.40 to 1.42, respectively. When the temperature changes from -50 to 0 °C and 0 to 50 °C, the maximum average temperature sensitivities are up to 10.11 and 10.67nm/°C, respectively. The proposed D-shaped PCF sensor can achieve dual-parameter sensing and has great potential for practical applications in biochemical and environmental science.
AB - In this paper, a D-shaped photonic crystal fiber (PCF) sensor based on a Sagnac interferometer is proposed, and it can achieve ultrahigh refractive index (RI) and temperature sensitivity when operating around the turning point of group birefringence (B
g). We undertake a theoretical analysis on B
g and a simulation calculation to study the sensing characteristics and obtain the optimized structure parameters of the D-shaped PCF sensor. The simulation results show that the maximum average RI sensitivities can reach 3253.33 and 15500nm/RIU in the RI range of 1.33 to 1.35 and 1.40 to 1.42, respectively. When the temperature changes from -50 to 0 °C and 0 to 50 °C, the maximum average temperature sensitivities are up to 10.11 and 10.67nm/°C, respectively. The proposed D-shaped PCF sensor can achieve dual-parameter sensing and has great potential for practical applications in biochemical and environmental science.
KW - Fiber sensor
KW - D-shaped photonic crystal fiber
KW - Group birefringence
KW - Sagnac interferometer
UR - http://www.scopus.com/inward/record.url?scp=85196855408&partnerID=8YFLogxK
U2 - 10.1016/j.photonics.2024.101291
DO - 10.1016/j.photonics.2024.101291
M3 - Article
SN - 1569-4410
VL - 61
SP - 1
EP - 13
JO - Photonics and Nanostructures - Fundamentals and Applications
JF - Photonics and Nanostructures - Fundamentals and Applications
M1 - 101291
ER -