Research on simultaneous measurement of refractive index and temperature comprising few mode fiber and spherical structure

Tong, Zhengrong; Zhong, Yimei; Wang, Xue; Zhang, Weihua

doi:10.1016/j.optcom.2018.03.057

Cited by 27 publications

(4 citation statements)

References 16 publications

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“…Zheng et al [18] developed a sensor comprising a few-mode fiber and two spherical structures. The spherical structure acts as a coupler, which can excite high-order modes and couple back the high-order modes and cladding modes into the optical fiber.…”

Section: Introductionmentioning

confidence: 99%

High Sensitivity Balloon-Like Sensor Based on Twin-Core and Twin-Hole Fiber

Zhang

Yao

2022

IEEE Photonics J.

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An all-fiber Mach-Zehnder interferometric (MZI) sensor for measuring temperature and refractive index (RI) is proposed and experimentally demonstrated. A high sensitivity balloon-like mode interferometer is fabricated with a twin-core and twin-hole fiber (TCTHF). The variations in ambient temperature and RI cause changes in phase differences between the modes, leading to shifts in the interference spectrum. The two resonance dip wavelength shifts within the spectrum are used to investigate the temperature and RI characteristics of the sensor. Experimental results show that the two dips have different responses to temperature and RI, indicating that the sensor can realize simultaneous measurement of temperature and RI. The obtained maximum sensing sensitivities are 0.051 nm/°C and 423.168 nm/RIU. The proposed sensor has potential applications in physical, biological, and chemical sensing owing to its high sensitivity, low cost, and small size.

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Section: Introductionmentioning

confidence: 99%

High Sensitivity Balloon-Like Sensor Based on Twin-Core and Twin-Hole Fiber

Zhang

Yao

2022

IEEE Photonics J.

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“…Optical fiber sensors have been a hot research topic in the sensing field because of their excellent properties of low fabrication cost, compact structure, and resistance to electromagnetic interference [1][2][3] . Therefore, they are widely used in structural health monitoring [4] , mechanical engineering [5] , and robotic arms [6] . However, conventional fiber optic sensors are unable to meet increasingly diverse needs in terms of both performance and measurement dimensions.…”

Section: Introductionmentioning

confidence: 99%

Directional bending sensing characteristics of in-line Mach-Zehnder interferometer based on asymmetrical twin-core fiber

Yang¹,

Yan²,

Luo³

et al. 2022

Advanced Sensor Systems and Applications XII

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We propose and experimentally demonstrate a simple directional bending sensor based on an in-line Mach-Zehnder interference structure of the single mode fiber (SMF)-multimode fiber (MMF)-asymmetrical twin-core fiber (ATCF)- MMF-SMF. Due to the asymmetric structure in twin-core fiber, this sensor can discriminate different bending directions. The interference spectrum shifts with the change of curvature. Furthermore, the sensor exhibits a linear response with a maximum bending sensitivity of 33.48 and -38.72 nm/m-1 in the curvature range from 0 to 3.01 m-1 for bending directions at -x (180°) and +x (0°) directions, respectively. The proposed fiber sensor has great potential in the future Internet of Things (IoT) due to its advantages, such as low cost, compactness, and high bending sensitivity.

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“…8) Hence, simultaneous measurement of both RI and temperature is of crucial importance for practical applications. So far, many optical fiber sensors for simultaneous sensing have been developed by utilizing various structures including tapered optical fiber, 9) Fabry-Perot interferometer, 10) Mach-Zehnder interferometer, 11) macrobent fiber, 12) Sagnac loop, 13) etc. Nevertheless, the sensitivities of most sensors are not high enough to satisfy the measurement needs.…”

mentioning

confidence: 99%

“…The difference may be caused by the temperature reduction of the sucrose solution when it is taken from the heating tank to the Abbe refractometer. 10) 216.37 10.85 High spatial resolution Limited RI range M-Z interferometer 11) 27.77 54 Low fabrication cost, simple configuration Low stability Macrobent fiber 12) 165.93 31.7 Easy to demodulate, cost-effective Low stability Sagnac loop-based interferometer 13) 131.49 1810 High temperature sensitivity Complicated structure, low stability SPR 15) 2323. A comparison table with previous results in terms of the and temperature sensitivities of the proposed sensor is presented in Table II.…”

mentioning

confidence: 99%

Simultaneous measurement of refractive index and temperature using a hybrid-grating sensor

Fan

Jiang

Zhang

et al. 2019

Appl. Phys. Express

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A hybrid-grating-based optical fiber sensor for simultaneously measuring the refractive index (RI) and temperature is proposed. The sensor is fabricated by inscribing a long period grating (LPG) and tilted fiber Bragg grating (TFBG) in the same region of an optical fiber in sequence. The hybrid grating takes advantage of both LPG’s high temperature sensitivity and TFBG’s high RI sensitivity, with consideration of the temperature-insensitive characteristic of wavelength difference between the cladding mode wavelength and core mode wavelength of TFBG. Experiments prove the ability of the sensor to measure the RI and temperature simultaneously. The sensitivities are 606.82 nm/RIU and 268.79 pm °C−1, respectively.

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Research on simultaneous measurement of refractive index and temperature comprising few mode fiber and spherical structure

Cited by 27 publications

References 16 publications

High Sensitivity Balloon-Like Sensor Based on Twin-Core and Twin-Hole Fiber

High Sensitivity Balloon-Like Sensor Based on Twin-Core and Twin-Hole Fiber

Directional bending sensing characteristics of in-line Mach-Zehnder interferometer based on asymmetrical twin-core fiber

Simultaneous measurement of refractive index and temperature using a hybrid-grating sensor

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