Research on dual-parameter optical fiber sensor based on thin-core fiber and spherical structure

Tong, Zhengrong; Wang, Xue; Zhang, Weihua; Xue, Lifang

doi:10.1088/1555-6611/aa9fb3

Cited by 8 publications

(2 citation statements)

References 15 publications

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“…The measured maximum temperature sensitivity at 30 °C-80 °C is ~0.067 nm °C−1 , and the maximum refractive index sensitivity is −119.9 nm/ RIU, respectively. However, thin-core fiber was needed [16]. In [17] an SMS fiber optic temperature sensor with a maximum temperature sensitivity of 1.4 dB °C−1 below 61 °C and of 15 nm °C−1 above 72 °C have been achieved, but an elaborately designed polymer coating was required to replace the silica cladding of the MMF.…”

Section: Laser Physicsmentioning

confidence: 99%

Dual spherical single-mode-multimode-single-mode optical fiber temperature sensor based on a Mach–Zehnder interferometer

et al. 2018

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A dual spherical single-mode-multimode-single-mode (DSSMS) optical fiber temperature sensor based on a Mach-Zehnder interferometer (MZI) was designed and implemented in this paper. Theoretical and experimental results indicated that the LP 01 mode in the core and the LP 09 mode excited by the spherical structure were maintained and transmitted via multimode fiber and interfered at the second spherical structure, resulting in the interference spectrum. An increase or decrease in temperature can cause significant red-shift or blue-shift of the spectrum, respectively. The linearity of the spectral shift due to the temperature change is ~0.999, the sensitivity at 30 °C-540 °C is ~37.372 pm °C−3 , and at −25 °C-25 °C is ~37.28 pm °C−1 . The reproducibility error of this all-fiber temperature sensor at 30 °C-540 °C is less than 0.15%. Compared with the optical fiber sensor with a tapered structure and fiber core offset structure, this MZI-based DSSMS optical fiber temperature sensor has higher mechanical strength. Moreover, benefiting from low-cost and environmentally friendly materials, it is expected to be a novel micro-nano all-fiber sensor.

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Section: Laser Physicsmentioning

confidence: 99%

Dual spherical single-mode-multimode-single-mode optical fiber temperature sensor based on a Mach–Zehnder interferometer

et al. 2018

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“…The temperature sensitivity of this sensor is not higher than the proposed sensor, and the cost of this sensor is higher than the proposed sensor. In 2018, Tong et al [14] proposed a dual-parameter optical fiber sensor based on thin-core fiber (TCF) and spherical structure. The extinction ratio of this sensor (about 8 dB) is lower than that of the proposed sensor (about 20 dB), and the fabrication of this sensor with two spherical structures is more complicated than the proposed sensor.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous measurement of temperature and refractive index based on a spherical structure cascaded with thin-core fiber

et al. 2018

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A novel fiber-optic sensor for simultaneous measurement of temperature and refractive index (RI) has been proposed. The sensor consists of a structure of lead-in single-mode fiber (SMF)spherical structure-middle section SMF-thin-core fiber-lead-out SMF. The spherical structure acts as optical coupler, and excites the cladding modes. The extinction ratio of the transmission spectra can reach up to 20 dB. The experimental results indicate that the temperature sensitivities at interference dip1, dip2 and dip3 are 0.037 nm °C−1 , 0.046 nm °C−1 and 0.048 nm °C−1 within the temperature range from 25 °C to 70 °C, respectively, and the RI sensitivities at interference dip1 are −22.111 nm/refractive index unit (RIU) within the RI range from 1.3330 to 1.3496 and −72.584 nm/RIU within the RI range from 1.3496 to 1.3757. The RI sensitivities at interference dip2 and dip3 are 52.679 nm/RIU and −39.803 nm/RIU, respectively, within the RI range from 1.3330 to 1.3797, respectively. Given the large difference in RI between interference dip2 and dip3, simultaneous measurement of temperature and RI can be achieved by monitoring the wavelength shifts of interference dip2 and dip3. The proposed sensor has the advantages of easy fabrication, low cost, and good mechanical strength, and has potential applications in physical, biological, and chemical sensing.

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Multi-parameter sensor based on dumbbell stepped fiber core structure with the composite interferometric effect

Wang,

et al. 2024

Optics Communications

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Research on dual-parameter optical fiber sensor based on thin-core fiber and spherical structure

Cited by 8 publications

References 15 publications

Dual spherical single-mode-multimode-single-mode optical fiber temperature sensor based on a Mach–Zehnder interferometer

Dual spherical single-mode-multimode-single-mode optical fiber temperature sensor based on a Mach–Zehnder interferometer

Simultaneous measurement of temperature and refractive index based on a spherical structure cascaded with thin-core fiber

Multi-parameter sensor based on dumbbell stepped fiber core structure with the composite interferometric effect

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