Temperature-compensated distributed refractive index sensor based on an etched multi-core fiber in optical frequency domain reflectometry

Zongda Zhu; Dexin Ba; Lu Liu; Liqiang Qiu; Yongkang Dong

doi:10.1364/OL.432405

Temperature-compensated distributed refractive index sensor based on an etched multi-core fiber in optical frequency domain reflectometry

Zongda Zhu, Dexin Ba, Lu Liu, Liqiang Qiu, Yongkang Dong

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

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	https://doi.org/10.1364/OL.432405
State	Published - 1 Sep 2021
Externally published	Yes

Bibliographical note

Funding Information:
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).

Publisher Copyright:
©2021 Optical Society of America.

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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.",

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AU - Zhu, Zongda

AU - Ba, Dexin

AU - Liu, Lu

AU - Qiu, Liqiang

AU - Dong, Yongkang

PY - 2021/9/1

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Temperature-compensated distributed refractive index sensor based on an etched multi-core fiber in optical frequency domain reflectometry

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