Highly sensitive refractive index sensor based on plastic optical fiber balloon structure

Gandhi, M. S. Aruna; Zhao, Yuanfang; Huang, Chenxingyu; Zhang, Yuan; Fu, H. Y.; Li, Qian

doi:10.1364/ol.455562

Cited by 10 publications

(6 citation statements)

References 20 publications

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“…Highly sensitive refractive index (RI) detection is always desired in both scientific research and engineering fields. Fiber-optical sensors have emerged as a promising candidate for liquid refractive index sensing due to their attractive advantages, such as flexible structural design, ease of integration, and immunity to electromagnetic interference [1][2][3][4]. Nowadays, various fiber sensing configurations based on different optical mechanisms have been designed for measuring liquid RI, including long period grating [5][6][7], fiber Bragg grating [8][9][10], microfiber resonator [11][12][13], microstructure fiber [14][15][16], and mode interferometer [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Vernier-effect-based fiber microcoupler for highly sensitive liquid refractive index sensing

Sun,

Wu,

Song

et al. 2024

Meas. Sci. Technol.

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An orthogonal mode interferometer (OMI) is proposed and experimentally demonstrated for liquid refractive index sensing using the optical Vernier effect. The OMIs are based on weakly fiber microcouplers, which are fabricated by fusing single mode fiber and coreless fiber together. Owing to the birefringent characteristic of the hybrid coupler, the optical Vernier effect is dependent on the overlap of mode interference between the x and y polarizations. Compared to the response of the individual resonance dip, the signal demodulation of the Vernier envelope exhibits more excellent signal amplification capability. Experimental results show that the Vernier envelope of the OMI achieves a refractive index (RI) sensitivity of 22427.03 nm/RIU near the RI of 1.33 with a magnification factor of 4.1. Moreover, with its high sensitivity, flexible design and simplified configuration, our proposed OMI based on the optical Vernier effect is well suitable for a wide range of biosensing applications.

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Section: Introductionmentioning

confidence: 99%

Vernier-effect-based fiber microcoupler for highly sensitive liquid refractive index sensing

Sun,

Wu,

Song

et al. 2024

Meas. Sci. Technol.

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“…Although optical fibers are generally composed of silica, POFs present the additional advantages of ease of fabrication and operation, a low cost, high flexibility, softness, a light weight, higher fracture toughness, higher strain limits, and biocompatibility when compared to silica optical fibers [3,4]. Such properties make POFs a relevant technology for applications such as sensors [5][6][7]; local area networks [1,8]; and the fabrication of devices such as tapers [9], connectors [10], couplers [11,12], gratings [13,14], and even interferometric systems [5,15].…”

Section: Introductionmentioning

confidence: 99%

Plastic Optical Fiber Spectral Filter Based on In-Line Holes

Mora-Nuñez,

Santiago-Hernández,

Bravo-Medina

et al. 2024

Photonics

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We propose a spectral filter based on a plastic optical fiber with micro-holes as a low-cost, robust, and highly reproducible spectral filter. The spectral filter is explored for two configurations: a fiber extended in a straight line and a fiber optic loop mirror scheme configuration. The transmission traces indicate a spectral blue shift in peak transmission, at 587 nm, 567 nm, 556 nm, and 536 nm for zero, one, two, and three holes in the fiber, respectively. The filter exhibits a bandpass period of approximately 120 nm. Additionally, we conduct a comparison of the transmission with holes separated by distances of 1 cm and 500 μm. The results demonstrate that the distance between holes does not alter the spectral transmission of the filter. In the case of the fiber loop mirror configuration, we observe that the bandpass can be adjusted, suggesting the presence of multimode interference. Exploring variations in the refractive index within the holes by filling them with glucose solutions at various concentrations, we determine that the filtering band and spectral shape remain unaltered, ensuring the stable and robust operation of our spectral filter.

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“…As a result, plastic optical fiber-based intensitymodulated concentration sensors and refractive index sensors are highly preferred. And researchers have proposed a wide range of structures of sensing head such as embedded circular hole structures [8,9], conical microstructures [10], D-shaped structures [11][12][13][14], Ushaped structures [15][16][17][18], spiral structures [19], and balloon-shaped structures [20]. In recent years, researchers have made some progress in in the structural design of sensing head structure to improve the sensitivity and accuracy of plastic fiber optic sensors.…”

Section: Introductionmentioning

confidence: 99%

A plastic optic fiber sensor with temperature compensation for glucose concentration measurement

Wang¹,

Zhao²,

cheng³

2023

Preprint

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An optical fiber sensor based on a gradually hot-pressed flatted plastic optical fiber (GPF) and F-P interference structure is proposed to eliminate the effect of ambient temperature drift in the detection of glucose concentration. The sensing characteristics of the prepared sensing head were studied at various glucose concentrations and ambient temperatures. Based on the differential sensitivity of GPF and F-P interference film to glucose concentration and temperature, temperature-compensated glucose concentration sensing monitoring was obtained by the sensitivity matrix equation, where the peak wavelength of interference peak and transmitted light intensity were used as information carriers. The results show that the proposed plastic optical fiber sensor can provide the monitoring of glucose sample concentrations ranging from 0 to 500mg.ml-1, and the effect of ambient temperature drift is eliminated to make it more useful. Because of its simple structure, high repeatability, easy integration with the chip, and ability to eliminate the effect of temperature drift, the sensor has potential applications in biochemistry, medical diagnosis, and environmental monitoring.

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Highly sensitive refractive index sensor based on plastic optical fiber balloon structure

Cited by 10 publications

References 20 publications

Vernier-effect-based fiber microcoupler for highly sensitive liquid refractive index sensing

Vernier-effect-based fiber microcoupler for highly sensitive liquid refractive index sensing

Plastic Optical Fiber Spectral Filter Based on In-Line Holes

A plastic optic fiber sensor with temperature compensation for glucose concentration measurement

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