Super-High Sensitivity of Fiber Temperature Sensor Based on Leaky-Mode Bent SMS Structure

Zhang, Yujuan; Xie, Tian; Xue, L.; Zhang, Qijin; Yang, Li; Zhu, Bing

doi:10.1109/lpt.2013.2245644

Cited by 45 publications

(29 citation statements)

References 13 publications

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“…Zhang et al [51] fixed the curved single-mode-multimode-single-mode structure on a polymer plate frame, which had a high coefficient of thermal expansion. The interference spectrum shifted with the temperature change.…”

Section: Bendingmentioning

confidence: 99%

Applications of Modal Interferences in Optical Fiber Sensors Based on Mismatch Methods

Cai

Zhao

2014

Instrumentation Science & Technology

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& Modal interference is a major topic in optical fiber sensing technology that has been applied to measure temperature, refractive index, curvature, displacement, strain, humidity, pH, and other parameters. In this article, basic sensing principles for the development of modal interferometers are introduced based on core-cladding and core modes. The structures, principles, and applications of the sensors are comprehensively reviewed and potential and future prospects are discussed.

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Section: Bendingmentioning

confidence: 99%

Applications of Modal Interferences in Optical Fiber Sensors Based on Mismatch Methods

Cai

Zhao

2014

Instrumentation Science & Technology

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“…For temperature sensing, there are several techniques have been used or proposed previously including fiber Bragg grating (FBG) and interference mechanism based structure . Silica based FBG sensor is a very established and practical technique, however, its sensitivity is relatively low which is ∼ 10 pm/°C .…”

Section: Introductionmentioning

confidence: 99%

“…Temperature sensitivity of the existing structures can be substantially enhanced by incorporation of high TOC material such as polymer into sensor structure. Etched and bent multimode fiber (MMF) surrounded with E7 liquid demonstrated high temperature sensitivity of 6500 pm/°C . While the balloon‐like bent technique of MMF and single mode fiber (SMF) also attained relatively high temperature sensitivity of −2060 pm/°C and 418 pm/°C, respectively.…”

Section: Introductionmentioning

confidence: 99%

Compact and high sensitivity low‐temperature sensor based on coreless silica fiber Mach‐Zehnder interferometer

Baharin

Musa

Azmi

et al. 2018

Micro & Optical Tech Letters

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An all‐fiber Mach‐Zehnder interferometer based on symmetrical offset coreless silica fiber (CSF) is proposed and demonstrated for temperature sensing. The sensor is constructed by a symmetrical offset splicing of a short CSF section between two CSF sections. Thus, two distinct optical paths are created inside and outside of the offset section resembling a Mach‐Zehnder interferometer. For temperature sensing, the offset gap is filled with refractive index liquid with high thermo‐optic coefficient of 3.34 × 10−4. Measurement is established by monitoring wavelength shift resulting from interference of modes between the two distinct optical paths. A very high temperature sensitivity of 3220 pm/°C has been achieved with a short sensor length of 1.5 mm. Due to its compact size and high sensitivity, the proposed structure would be an attractive option for low temperature measurement such as for human body temperature monitoring.

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“…Several works have been implemented for improving the temperature sensitivity. Such as with high thermo-optic coefficient material [13] or solution [14], high RI liquid [15] or index matching fluids [16] as the cladding, these sensors have been proved to be highly sensitive to temperature variations. In this letter, we propose and demonstrate a miniature and robust capillary-fiber hybrid structure temperature sensor with wavelength-tunable spectral features and enhanced temperature sensitivities.…”

Section: Introductionmentioning

confidence: 99%

Microcapillary-Based High-Sensitivity and Wavelength-Tunable Optical Temperature Sensor

Liu

Chen

et al. 2015

IEEE Photon. Technol. Lett.

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A high-sensitivity and wavelength-tunable temperature sensor based on a short piece of fused-silica microcapillary (FSC) spliced between two single mode fibers (FSCs) and immerged in ethonal solution is proposed and experimentally investigated. Using the thermo-optic effect of ethanol and high sensitivity to refractive index of the FSC modal interference, the temperature sensitivity of the sensor immerged in ethanol solutions is significantly increased over an FSC sensor in air. Besides, the sensitivity and the feature wavelength of the interferometer can be tuned by adjusting the concentration and refractive index of the filling ethonal solution, which is important for achieving the maximum measurement range.Index Terms-Interference, fiber optic sensor, micro capillary, refractive index.

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Super-High Sensitivity of Fiber Temperature Sensor Based on Leaky-Mode Bent SMS Structure

Cited by 45 publications

References 13 publications

Applications of Modal Interferences in Optical Fiber Sensors Based on Mismatch Methods

Applications of Modal Interferences in Optical Fiber Sensors Based on Mismatch Methods

Compact and high sensitivity low‐temperature sensor based on coreless silica fiber Mach‐Zehnder interferometer

Microcapillary-Based High-Sensitivity and Wavelength-Tunable Optical Temperature Sensor

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