Miniature optical fiber temperature sensor based on FMF-SCF structure

Zhang, Chuanbiao; Ning, Tigang; Jiao, Z.; Gao, Xuekai; Lin, Hungyen; Li, Jing; Li, Pei; Wen, Xiaodong

doi:10.1016/j.yofte.2018.02.005

Cited by 29 publications

(9 citation statements)

References 19 publications

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“…In order to further investigate performances of the proposed sensor, the transmission spectrum as a function of temperature can be analyzed by the amplitude of the spatial frequency spectra as referring to [25]. Fig.…”

Section: Methodsmentioning

confidence: 99%

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Strain-Insensitive Temperature Sensor Based on Few-Mode Fiber and Photonic Crystal Fiber

Gao

Xie

et al. 2022

IEEE Photonics J.

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Based on few-mode fiber (FMF) and photonic crystal fiber (PCF), a new temperature sensor with a FMF-PCF-FMF hybrid construction has been developed. Furthermore, the sensor has a longitudinally symmetrical structure that makes it have a flexible sensor head, which enhances the practical performance. Simulated results show that there are three resonant peaks with extinction ratio above 18 dB in the wavelength from 1630 nm to 1720 nm, and the temperature can be measured by calculating wavelength shift of resonant peaks. The experimental results show that the temperature sensitivity of the proposed sensor is as high as 38.6 pm/°C when the temperature ranges from 20°C to 80°C. Meanwhile, the strain sensitivity of the proposed sensor is as low as −0.457 pm/με when strain ranges from 0 to 3000 με. The high temperature sensitivity and ultralow strain sensitivity indicate that the proposed sensor can effectively eliminate the cross-sensitive issue of temperature and strain. In addition to excellent sensing performances, simple and compact structure make the proposed sensor be potential in practical applications.

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Section: Methodsmentioning

confidence: 99%

“…Owing to the thermal expansion effect and the thermo-optic effect, the geometric size and refractive index of the fiber change with different temperature, resulting in the wavelength shift of resonant peaks [16]. The wavelength shift induced by temperature changes can thus be calculated by [25] Δλ…”

Section: Sensing Principlementioning

confidence: 99%

Strain-Insensitive Temperature Sensor Based on Few-Mode Fiber and Photonic Crystal Fiber

Gao

Xie

et al. 2022

IEEE Photonics J.

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“…The last possibility to implement an interferometer with uncoupled-core MCF consists of exciting all the cores of the MCF by means of intermediate fibers or a lateral offset [43,124,125]. For example, microscopic segments of MMF spliced between input/output SMF and MCF or by splicing SMF and the MCF with lateral offsets.…”

Section: 3c Modal Interferometers Designsmentioning

confidence: 99%

Mode-division and spatial-division optical fiber sensors

et al. 2022

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The aim of this paper is to provide a comprehensive review of mode-division and spatial-division optical fiber sensors, mainly encompassing interferometers and advanced fiber gratings. Compared with their single-mode counterparts, which have a very mature field with many highly successful commercial applications, multimodal configurations have developed more recently with advances in fiber device fabrication and novel mode control devices. Multimodal fiber sensors considerably widen the range of possible sensing modalities and provide opportunities for increased accuracy and performance in conventional fiber sensing applications. Recent progress in these areas is attested by sharp increases in the number of publications and a rise in technology readiness level. In this paper, we first review the fundamental operating principles of such multimodal optical fiber sensors. We then report on the theoretical formalism and simulation procedures that allow for the prediction of the spectral changes and sensing response of these sensors. Finally, we discuss some recent cutting-edge applications, mainly in the physical and (bio)chemical fields. This paper provides both a step-by-step guide relevant for non-specialists entering in the field and a comprehensive review of advanced techniques for more skilled practitioners.

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“…Many of the aforementioned techniques are performed as minimally invasive interventional procedures, in which highly miniaturised and flexible sensors are needed for integration into catheters, needles and guidewires. Fibre-optics can readily meet these requirements, and fibre-optic temperature sensing approaches include fibre Bragg gratings (FBG) and long period fibre gratings (LPFG) [ 32 , 33 , 34 , 35 , 36 , 37 ]; polymer-based [ 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ], inorganic [ 48 , 49 , 50 ] and microbubble-based [ 51 ] Fabry–Pérot (FP) cavities; multimode interference (MMI) segments [ 52 , 53 , 54 , 55 , 56 , 57 , 58 ]; infiltrated photonic crystal fibre and hollow-core fibre [ 59 , 60 ]; fluorescence-based methods [ 22 , 23 , 24 ]; and sensors based on polymer optical fibres [ 61 , 62 , 63 , 64 ]. The wide variety of geometries and materials employed in these sensors can lead to very different response times, from sub-millisecond for a silicon FP cavity [ 50 ] to hundreds of milliseconds for packaged FBGs [ 18 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characterisation of Fibre-Optic Temperature Sensors for Physiological Monitoring

Coote

Torii

Desjardins

2020

Sensors

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Fast, miniature temperature sensors are required for various biomedical applications. Fibre-optics are particularly suited to minimally invasive procedures, and many types of fibre-optic temperature sensors have been demonstrated. In applications where rapidly varying temperatures are present, a fast and well-known response time is important; however, in many cases, the dynamic behaviour of the sensor is not well-known. In this article, we investigate the dynamic response of a polymer-based interferometric temperature sensor, using both an experimental technique employing optical heating with a pulsed laser, and a computational heat transfer model based on the finite element method. Our results show that the sensor has a time constant on the order of milliseconds and a −6 dB bandwidth of up to 178 Hz, indicating its suitability for applications such as flow measurement by thermal techniques, photothermal spectroscopy, and monitoring of thermal treatments.

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Miniature optical fiber temperature sensor based on FMF-SCF structure

Cited by 29 publications

References 19 publications

Strain-Insensitive Temperature Sensor Based on Few-Mode Fiber and Photonic Crystal Fiber

Strain-Insensitive Temperature Sensor Based on Few-Mode Fiber and Photonic Crystal Fiber

Mode-division and spatial-division optical fiber sensors

Dynamic Characterisation of Fibre-Optic Temperature Sensors for Physiological Monitoring

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