A cascaded triple waist-enlarged taper few-mode fiber temperature sensor with beaded structure

Fu, Xinghu; Huang, Zhexu; Li, Qiannan; Cao, Xiqing; Wang, Yufan; Fu, Guangwei; Jin, Wa; Bi, Weihong

doi:10.1016/j.optlastec.2022.108621

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…The preparation methods of TOF probes include arc discharge technology [ 43 ], laser processing technology [ 44 ], chemical etching technology [ 45 ], etc. TOF structures are commonly found in the following configurations: single tapered structure [ 46 ], nano-tapered fiber [ 47 ], grating tapered structure [ 48 ], multi-tapered cascade structure [ 49 ], taper tip [ 50 ], and so on. Internal beam splitting and optical path coupling will occur as a result of the change in fiber geometry.…”

Section: Introductionmentioning

confidence: 99%

Advances in Tapered Optical Fiber Sensor Structures: From Conventional to Novel and Emerging

et al. 2023

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Optical fiber sensors based on tapered optical fiber (TOF) structure have attracted a considerable amount of attention from researchers due to the advantages of simple fabrication, high stability, and diverse structures, and have great potential for applications in many fields such as physics, chemistry, and biology. Compared with conventional optical fibers, TOF with their unique structural characteristics significantly improves the sensitivity and response speed of fiber-optic sensors and broadens the application range. This review presents an overview of the latest research status and characteristics of fiber-optic sensors and TOF sensors. Then, the working principle of TOF sensors, fabrication schemes of TOF structures, novel TOF structures in recent years, and the growing emerging application areas are described. Finally, the development trends and challenges of TOF sensors are prospected. The objective of this review is to convey novel perspectives and strategies for the performance optimization and design of TOF sensors based on fiber-optic sensing technologies.

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Section: Introductionmentioning

confidence: 99%

Advances in Tapered Optical Fiber Sensor Structures: From Conventional to Novel and Emerging

et al. 2023

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“…Optical fiber sensors have been widely recognized after decades of development [ 1 , 2 , 3 , 4 , 5 ]. Differently from traditional electronic sensors, optical fiber has its own indispensable advantages, including but not limited to: electrical insulation, corrosion resistance, variable shape, small size, wide range of measuring objects, and easy reuse [ 6 , 7 , 8 , 9 , 10 ]. Among them, temperature, as the most important parameter for perceiving the external environment, has received the most extensive attention from scientists, and has been widely researched [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Adaptive Fiber-Ring Lasers Based on Isopropanol Filled Microfiber Coupler for High-Sensitivity Temperature Sensing

Lin

Zhao

et al. 2022

Micromachines

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We demonstrated a new method for temperature measurement inside a fiber ring laser (FRL) cavity. Different from traditional FRL temperature sensing system which need additional filter working as a sensor, a micro-fiber coupler (MFC) was designed as a beam splitter, filter, and temperature sensor. In addition, isopropanol, a liquid with very high photothermal coefficient, is selectively filled in the MFC in order to improve the sensitivity of the system on temperature. In the dynamic range of 20 °C–40 °C, we obtained a good temperature sensitivity of −1.29 nm/°C, with linear fitting up to 0.998. Benefiting from the advantages of laser sensing, the acquired laser has a 3 – dB bandwidth of less than 0.2 nm and a signal-to-noise ratio (SNR) of up to 40 dB. The proposed sensor has a low cost and high sensitivity, which is expected to be used in biomedical health detection, real-time monitoring of ocean temperature, and other application scenarios.

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“…In the past decade, optical fiber temperature sensor has been developed rapidly, because of its unique advantages such as high sensitivity, small size, light weight and immunity to electromagnetic interference [1][2][3][4][5]. Interferometers with different structures have built micro-nano laboratories on optical fibers to achieve the ultimate pursuit of sensitivity, including the Mach Zehnder interferometer (MZI) [6][7][8][9], Fabry Perot interferometer (FPI) [10][11][12], Michelson interferometer (MI) [13][14][15][16] and the Sagnac ring structure [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Fiber Temperature Sensor Based on Vernier Effect and Optical Time Stretching Method

Lin

Liu

et al. 2022

Micromachines

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A novel method for ultra-sensitive and ultra-fast temperature sensing has been successfully implemented by cascading Saganc rings to generate the Vernier effect and doing the same dispersive fibers to achieve the optical time-stretching effect. This is different from the traditional point fiber sensor demodulated by optical spectrum analyzer (OSA) whose demodulation speed is usually at the second level. The designed system maps the wavelength domain to the time domain through the dispersive fiber, which can realize the ultra-fast temperature monitoring at the nanosecond level. The cascaded Sagnac ring is composed of polarization maintaining fiber (PMF) which is significantly affected by the thermal-optical coefficient. When the temperature changes, the variation is as high as −6.228 nm/°C, which is 8.5 times higher than the sensitivity based on the single Sagnac ring system. Furthermore, through the optical time stretching scheme, the corresponding response sensitivity is increased from 0.997 ns/°C to 7.333 ns/°C, and the magnification is increased 7.4 times with a response speed of 50 MHz.

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A cascaded triple waist-enlarged taper few-mode fiber temperature sensor with beaded structure

Cited by 4 publications

References 18 publications

Advances in Tapered Optical Fiber Sensor Structures: From Conventional to Novel and Emerging

Advances in Tapered Optical Fiber Sensor Structures: From Conventional to Novel and Emerging

Adaptive Fiber-Ring Lasers Based on Isopropanol Filled Microfiber Coupler for High-Sensitivity Temperature Sensing

Fiber Temperature Sensor Based on Vernier Effect and Optical Time Stretching Method

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