Enhancing the Visibility of Vernier Effect in a Tri-Microfiber Coupler Fiber Loop Interferometer for Ultrasensitive Refractive Index and Temperature Sensing

Wei, Fangfang; Liu, Dejun; Wang, Zhe; Farrell, Gerald; Wu, Qiang; Peng, Gang-Ding; Semenova, Yuliya

doi:10.1109/jlt.2020.3035655

Cited by 21 publications

(4 citation statements)

References 26 publications

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“…A practical way to do this, demonstrated in a certain number of cases, is to take advantage of the Vernier effect between the fringe patterns of the two interferometers [138]. A practical example of such strategy involving a triple microfiber coupler interferometer was recently demonstrated to significantly improve the refractive index and temperature sensitivities [139].…”

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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Section: 3c Modal Interferometers Designsmentioning

confidence: 99%

Mode-division and spatial-division optical fiber sensors

et al. 2022

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“…Melting tapered fiber coupler is one of the most representative all-optical devices made by using the technology of melting taper [7][8][9] . This method is widely used with the advantages of simple operation, low fabrication cost, and low device loss.…”

Section: Introductionmentioning

confidence: 99%

“…The output end of the couplers was cascaded with a polarization-maintaining fiber and then tapered to form a Sagnac ring. The magnetic field sensing is realized by coating the magnetic fluid in the fused cone coupling region, and the magnetic field sensitivity is measured as 102pm / mT within the magnetic field range of 0 -60mT [7] .…”

Section: Introductionmentioning

confidence: 99%

Refractive index sensing of melting tapered fiber coupler based on dual-port input

Wang

Jiang

et al. 2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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A refractive index sensor based on dual-port input of melting tapered fiber coupler is proposed in this paper. By combining theory and experiment, the influence of the coupling degree of the tapered region on the output mode field and output power of the fiber coupler is studied by finite element method. Two single-mode fibers are connected to custom-made couplers with different spectral ratios, and then the fibers are wounded and melted so that the fiber core is refined, closed and tapered. The mode fieldsof the two fibers are coupled and affect each other to realize the fiber transmission of different powers. By using the taper region structure for refractive index detection, the refractive index range of 1.335to 1.399, the sensor sensitivity of 131.29pm / RIU, and the linear fitting degree of 95.98% were obtained. The structure of the sensor is simple, and the input power can be controlled according to the demand. The production cost is low and has a good application prospect and development value.

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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]. However, due to the limitation of demodulation mode, the OSA has a slow demodulation speed, which makes it very difficult to realize real-time online temperature monitoring [21][22][23].…”

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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Enhancing the Visibility of Vernier Effect in a Tri-Microfiber Coupler Fiber Loop Interferometer for Ultrasensitive Refractive Index and Temperature Sensing

Abstract: and Semenova, Yuliya (2020) Enhancing the visibility of Vernier effect in a tri-microfiber coupler fiber loop interferometer for ultrasensitive refractive index and temperature sensing. Journal of Lightwave Technology.

Cited by 21 publications

References 26 publications

Mode-division and spatial-division optical fiber sensors

Mode-division and spatial-division optical fiber sensors

Refractive index sensing of melting tapered fiber coupler based on dual-port input

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

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