Abstract
We proposed a temperature-compensated distributed refractive index (RI) sensor using an etched multi-core fiber (MCF) in optical frequency domain reflectometry. The MCF contains inner and outer cores and is etched until the outer core is exposed. Therefore, the outer core can be used for distributed RI sensing, and the inner core can be used for temperature compensation. The sensing length of 19 cm and the spatial resolution of 5.3 mm are achieved in the experiment. The RI sensing range is as wide as 1.33-1.44 refractive index units (RIU), and the maximum sensitivity of 47 nm/RIU is obtained around 1.44 RIU. Additionally, the temperature sensitivity is 9.8 pm/°C. Using this sensor, we successfully detected the glycerol diffusion process in water.
Original language | English |
---|---|
Pages (from-to) | 4308-4311 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 46 |
Issue number | 17 |
DOIs | |
State | Published - 1 Sep 2021 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:©2021 Optical Society of America.
Funding
Funding. National Key Scientific Instrument and Equipment Development Projects of China (2017YFF0108700); National Natural Science Foundation of China (61975045); Natural Science Foundation of Heilongjiang Province (LH2020F014).
Funders | Funder number |
---|---|
National Natural Science Foundation of China | 61975045 |
Natural Science Foundation of Heilongjiang Province | LH2020F014 |
National Key Scientific Instrument and Equipment Development Projects of China | 2017YFF0108700 |