Characteristics Analysis of Chemical Concentration Sensor Based on Three-layer FBG

Wu, Zhaoxia; Yu, Xinyan; Gu, Erdan; Kong, Zhi; Li, Wenchao

doi:10.4236/opj.2013.32b063

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…The high index material may be any metal oxide or silicon. Researchers are engaged in refractive index, chemical, biochemical and gas sensing applications of SPR-based fiber optic sensors using a high index layer [22][23][24][25]. Another option to improve sensing performance is the use of a combination of materials in which one of the materials is high index and the other is selective to the analyte of sensing.…”

Section: Introductionmentioning

confidence: 99%

Tuning the field distribution and fabrication of an Al@ZnO core–shell nanostructure for a SPR-based fiber optic phenyl hydrazine sensor

2016

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We report the fabrication and characterization of a surface plasmon resonance (SPR)-based fiber optic sensor that uses coatings of silver and aluminum (Al)-zinc oxide (ZnO) core-shell nanostructure (Al@ZnO) for the detection of phenyl hydrazine (Ph-Hyd). To optimize the volume fraction (f) of Al in ZnO and the thickness of the core-shell nanostructure layer (d), the electric field intensity along the normal to the multilayer system is simulated using the two-dimensional multilayer matrix method. The Al@ZnO core-shell nanostructure is prepared using the laser ablation technique. Various probes are fabricated with different values of f and an optimized thickness of core-shell nanostructure for the characterization of the Ph-Hyd sensor. The performance of the Ph-Hyd sensor is evaluated in terms of sensitivity. It is found that the Ag/Al@ZnO nanostructure core-shell-coated SPR probe with f = 0.25 and d = 0.040 μm possesses the maximum sensitivity towards Ph-Hyd. These results are in agreement with the simulated ones obtained using electric field intensity. In addition, the performance of the proposed probe is compared with that of probes coated with (i) Al@ZnO nanocomposite, (ii) Al nanoparticles and (iii) ZnO nanoparticles. It is found that the probe coated with an Al@ZnO core-shell nanostructure shows the largest resonance wavelength shift. The detailed mechanism of the sensing (involving chemical reactions) is presented. The sensor also manifests optimum performance at pH 7.

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Section: Introductionmentioning

confidence: 99%

Tuning the field distribution and fabrication of an Al@ZnO core–shell nanostructure for a SPR-based fiber optic phenyl hydrazine sensor

2016

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“…Fiber optic sensor has attracted considerable attention in the new sensor systems as it offers numerous advantages due to its small and thin size, biological inertness in nature and the safeness due to absence of electric current at the sensing point [4][5][6]. Fiber optic sensors are being widely used as chemical sensor in measuring the concentration of ethanol [7][8][9][10], sucrose and sodium chloride solution [11], glucose [12][13][14][15], preservative in milk [16], adulterated edible oil [17] and determination of nitrate [18], cadmium [19], fluoride [20], copper [21], magnesium [22] and lead ions [23] based on their concentrations in water.…”

Section: Introductionmentioning

confidence: 99%

Optical fiber tip sensor for glucose-adulterated honey detection

et al. 2019

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Honey, a natural sweet substance and also a high-value foodstuff has been a target for adulteration. This paper reports the early stage development of optical fiber tip sensor using a standard single mode fiber for adulterated honey detection. The development of simple, sensitive and low-cost sensor for direct detection of adulterated honey is a considerable interest in this context. A pure stingless bee honey was mixed with glucose adulterant at different volume ratios for the adulteration process. By changing this chemical composition, the refractive index of the adulterated honey varied and Fresnel reflection occured at the interface between the fiber tip and the adulterated honey solution also changed. The average sensitivity achieved by this sensor is 0.29 dBm/% with linear regression value up 0.97. This shows that, the sensor has a potential in adulterated honey detection.

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“…This outer space refractive index variation still falls in the achievable range by changing the sucrose solution concentration. 29) Therefore, it is feasible to reverse the Fano resonance by changing the effective refractive index of the structure.…”

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confidence: 99%

Tunable Fano and coupled-resonator-induced transparency resonances in the waveguide-coupled inverted nested ring resonator

Tian

Qian

et al. 2017

Appl. Phys. Express

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A waveguide-coupled inverted nested ring resonator structure is proposed and theoretically investigated. The effects of the parameters of such a structure on its transmission properties are demonstrated. Results show that both Fano resonance and coupled-resonator-induced transparency (CRIT) spectra can be produced within this structure, depending on the length ratio of the feedback waveguide and ring. In addition, the slope of the Fano resonance can be tuned and reversed by varying coupling coefficients and effective refractive index. Besides, CRIT-based tunable group delay can be obtained with high transmittance. Therefore, this structure has potential applications in optical sensors and optical communication.

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Characteristics Analysis of Chemical Concentration Sensor Based on Three-layer FBG

Cited by 6 publications

References 7 publications

Tuning the field distribution and fabrication of an Al@ZnO core–shell nanostructure for a SPR-based fiber optic phenyl hydrazine sensor

Tuning the field distribution and fabrication of an Al@ZnO core–shell nanostructure for a SPR-based fiber optic phenyl hydrazine sensor

Optical fiber tip sensor for glucose-adulterated honey detection

Tunable Fano and coupled-resonator-induced transparency resonances in the waveguide-coupled inverted nested ring resonator

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