TY - JOUR
T1 - Temperature-insensitive refractometer based on an RI-modulated singlemode-multimode-singlemode fibre structure
AU - Wang, Pengfei
AU - Zhang, Shuo
AU - Wang, Ruoning
AU - Farrell, Gerald
AU - Zhang, Meng
AU - Geng, Tao
AU - Lewis, Elfed
AU - Tian, Ke
N1 - Publisher Copyright:
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
PY - 2019
Y1 - 2019
N2 - A temperature-insensitive refractometer based on a refractive index (RI)modulated singlemode-multimode-singlemode (RMSMS) fibre structure is proposed and experimentally demonstrated. In this investigation, a combination of no-core fibre (NCF) and multimode fibre (MMF) regions provides an RI modulation region due to the difference in RI between the NCF and the MMF. In effect, by periodically embedding the NCF within the MMF section of a singlemode-multimode-singlemode (SMS) fibre structure, a long-period grating (LPG) can be effectively introduced in the MMF section, and the excited cladding modes are therefore able to sense surrounding RI variation. The modulation parameters are determined from the numerical simulations, and the experimental results show the maximum RI sensitivity of the fabricated sample is as high as 206.96 nm/RIU. In addition, the proposed RMSMS fibre structure is proven to be unaffected by external temperature variation (in the wavelength domain), which is a very attractive feature in practical sensing applications.
AB - A temperature-insensitive refractometer based on a refractive index (RI)modulated singlemode-multimode-singlemode (RMSMS) fibre structure is proposed and experimentally demonstrated. In this investigation, a combination of no-core fibre (NCF) and multimode fibre (MMF) regions provides an RI modulation region due to the difference in RI between the NCF and the MMF. In effect, by periodically embedding the NCF within the MMF section of a singlemode-multimode-singlemode (SMS) fibre structure, a long-period grating (LPG) can be effectively introduced in the MMF section, and the excited cladding modes are therefore able to sense surrounding RI variation. The modulation parameters are determined from the numerical simulations, and the experimental results show the maximum RI sensitivity of the fabricated sample is as high as 206.96 nm/RIU. In addition, the proposed RMSMS fibre structure is proven to be unaffected by external temperature variation (in the wavelength domain), which is a very attractive feature in practical sensing applications.
UR - https://www.scopus.com/pages/publications/85065817844
U2 - 10.1364/OE.27.013754
DO - 10.1364/OE.27.013754
M3 - Article
C2 - 31163834
AN - SCOPUS:85065817844
SN - 1094-4087
VL - 27
SP - 13754
EP - 13764
JO - Optics Express
JF - Optics Express
IS - 10
ER -