Optical Fiber Sensors Based on Core-Offset Structure: A Review

Niu, Huiwen; Zhang, Shuo; Chen, Wenhuan; Liu, Yue; Li, Xiang; Yan, Yongde; Wang, Shengjia; Geng, Tao; Sun, Weimin; Yuan, Libo

doi:10.1109/jsen.2021.3110852

Cited by 21 publications

(5 citation statements)

References 119 publications

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“…For this study, the sensor probe was designed with lateral offset (or lateral misalignment), which makes the major contribution to the overall loss in a fiber optic sensor [4], [18]. By this method, the light in the first fiber will leak into the cladding and exciting high cladding modes, while the second fiber will couple beams back to the core and form an interference pattern [19]. For this to happen, the end surfaces of the fiber optic cables were placed next to (or parallel to) one another [20].…”

Section: Methodsmentioning

confidence: 99%

Examination of Adulterated Coconut Oil by Fiber Optics Displacement Sensor Using Lateral Offset Approach

et al. 2022

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A single-mode fiber (SMF) sensor for detecting coconut oil adulteration is proposed. Coconut oil is commonly used in cooking but health problems are caused by its adulteration. The lateral offset approach to the SMF-SMF displacement sensor was employed in this experiment to analyze the sensing responses of adulterant concentrations in coconut oil. The offset distances of the sensing probe were set at 6.47 µm, 11.57 µm, and 14.64 µm. Pure coconut oil, paraffin oil, and palm oil have an initial refractive index of 1.4481, 1.4585, and 1.4634, respectively. Upon completion, the highest sensitivity was observed at a lateral offset distance of 14.64 µm. These values were 0.286 dBm/mol for palm oil detection and 0.045 dBm/mol for paraffin oil detection. The findings of these experiments also showed that the larger the offset distance, the greater the sensitivity of the fiber sensor.

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Section: Methodsmentioning

confidence: 99%

Examination of Adulterated Coconut Oil by Fiber Optics Displacement Sensor Using Lateral Offset Approach

et al. 2022

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“…When the object and parameter of the environment change in different degrees, the RI of the surrounding environment will change in different degrees, which results in a change in the peak wavelength of the interference spectrum, laying a solid foundation for optical fiber sensor research. The core offset structure, as part of the sensing unit, functions as a mode converter for energy exchange between the cladding mode and core mode, while the cascaded sensor has the capability of simultaneously measuring many parameters [ 64 ]. In fact, so far, researchers have developed optical fiber sensors based on different fusion modes and achieved good sensing performance.…”

Section: Processing Technologymentioning

confidence: 99%

Novel Optical Fiber-Based Structures for Plasmonics Sensors

et al. 2022

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Optical fiber sensors based on surface plasma technology have many unique advantages in specific applications such as extreme environmental monitoring, physical parameter determination, and biomedical indicators testing. In recent decades, various kinds of fiber probes with special structures were developed according to special processing such as tapering, splicing, etching, fiber balls, grating etc. In this paper, the fabrication technology, characteristics, development status and application scenarios of different special optical fiber structures are briefly reviewed, including common processing equipment. Furthermore, many special novel optical fiber structures reported in recent years are summarized, which have been used in various kinds of plasmonic sensing work. Then, the fiber-plasmonic sensors for practical applications are also introduced and examined in detail. The main aim of this review is to provide guidance and inspiration for researchers to design and fabricate special optical fiber structures, thus facilitating their further research.

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“…Strain sensors are widely used in the field of aircraft structural inspection and structural health monitoring in buildings [1][2][3] . Fiber strain sensors are of interest due to their compactness, high sensitivity, and resistance to electromagnetic interference [4][5][6] . In recent years, many fiber strain sensors have been proposed to improve the measurement of strain sensitivity, such as Fiber Bragg grating (FBG) [7,8] , Mach-Zehnder interferometer (MZI) [9,10] , Surface plasmon resonance (SPR) and long period fiber grating (LPFG) [11,12] .…”

Section: Introductionmentioning

confidence: 99%

Compact fiber sensor for simultaneous strain and temperature measurement based on malposition splice cascading single-mode-multimode-single-mode fiber grating

Yin,

Wei,

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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This paper presents a novel malposition fusion splice cascade single mode, graded index multimode, and single mode fiber (MS-SMS) structure for simultaneous measurement of strain and temperature. The MS-SMS sensor consists of a 4-period single mode fiber graded refractive index multimode fiber splice with a total length of 4.8 mm. Moreover, higher order cladding patterns are excited by malposition fusion splice. The theoretical analysis simulations are in agreement with the experimental results. Experimental validation showed the high strain and temperature sensitivity of the sensor. The sensor has two resonant dips with strain sensitivities of 7.6 pm/με and -8.7 pm/με, respectively. And the sensitivities of the two resonance depressions reached 48 pm/°C and 55.4 pm/°C, respectively.

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Optical Fiber Sensors Based on Core-Offset Structure: A Review

Cited by 21 publications

References 119 publications

Examination of Adulterated Coconut Oil by Fiber Optics Displacement Sensor Using Lateral Offset Approach

Examination of Adulterated Coconut Oil by Fiber Optics Displacement Sensor Using Lateral Offset Approach

Novel Optical Fiber-Based Structures for Plasmonics Sensors

Compact fiber sensor for simultaneous strain and temperature measurement based on malposition splice cascading single-mode-multimode-single-mode fiber grating

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