Modeling of Tapered Fiber-Optic Surface Plasmon Resonance Sensor With Enhanced Sensitivity

Verma, Roli; Sharma, Anurag; Gupta, Banshi D.

doi:10.1109/lpt.2007.906840

Cited by 65 publications

(36 citation statements)

References 10 publications

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“…In the sensing region rays propagate close to the critical angle of the region. Figure 12 shows the variation of sensitivity with taper ratio for this kind of probe [30]. The sensitivity increases with an increase in the taper ratio as reported in other studies [29].…”

Section: Tapered Probesupporting

confidence: 68%

“…To further enhance the sensitivity, an SPR probe of uniform core (with metallic coating) sandwiched between two unclad tapered fiber regions, shown in Figure 11, was proposed [30]. The taper region 1 brings down the angles of the bound rays in the fiber close to the critical angle of the unclad tapered region while the taper region 2 reconverts the angles of these rays to their initial values so that all the guided rays can propagate up to the output end of the fiber.…”

Section: Tapered Probementioning

confidence: 99%

“…To make the analysis simpler, all Figure 11: A novel SPR-based fiber optic sensor. Sensing probe of uniform core radius is sandwiched between two tapered fiber regions [30]. c IEEE.…”

Section: U-shapedmentioning

confidence: 99%

“…c IEEE. Figure 12: Variation of sensitivity of the SPR-based fiber optic sensor with taper ratio [30]. c IEEE.…”

Section: U-shapedmentioning

confidence: 99%

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Surface Plasmon Resonance‐Based Fiber Optic Sensors: Principle, Probe Designs, and Some Applications

2009

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Surface plasmon resonance technique in collaboration with optical fiber technology has brought tremendous advancements in sensing of various physical, chemical, and biochemical parameters. In this review article, we present the principle of SPR technique for sensing and various designs of the fiber optic SPR probe reported for the enhancement of the sensitivity of the sensor. In addition, we present few examples of the surface plasmon resonance-(SPR-) based fiber optic sensors. The present review may provide researchers valuable information regarding fiber optic SPR sensors and encourage them to take this area for further research and development.

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Section: Tapered Probesupporting

confidence: 68%

Section: Tapered Probementioning

confidence: 99%

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Surface Plasmon Resonance‐Based Fiber Optic Sensors: Principle, Probe Designs, and Some Applications

2009

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“…In particular, reducing size of the fibre core allows to achieve desired improvement in the full width at half maximum (FWHM) for SPR responce. Various alternative geometries have been proposed including tapered fibre designs, [15][16][17] U-shaped fibres, 18 as well as using single mode fibres (SMF) 19,20 for SPR sensor fabrication. The main challenge for those small core fibres is their fragility which makes it impossible to implement in any real-world application.…”

Section: Introductionmentioning

confidence: 99%

Exposed core microstructured optical fiber surface plasmon resonance biosensor

et al. 2014

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Sensitivity enhancement of fluorescence detection in CE by coupling and conducting excitation light with tapered optical fiber

et al. 2010

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This paper reports the enhancement of sensitivity of detection for in-column fiber opticinduced fluorescence detection system in CE by tapered optical fiber (TOF). Two types of optical fiber, TOF and conventional cylindrical optical fiber (COF), were employed to construct the CE (TOF-CE and COF-CE) and were compared for sensitivity to riboflavin (RF). The fluorescence intensities from a RF sample with excitation light sources and fibers at various coupling angles were investigated. The fluorescence signal from TOF-CE was ca. ten times that of COF-CE. In addition, the detection performance of four excitation light source-fiber configurations including Laser-TOF, Laser-COF, LED-TOF, and LED-COF were compared. The LODs for RF were 0.21, 0.82, 0.80, and 7.5 nM, respectively, for the four excitation light source-fiber configurations. The results demonstrate that the sensitivity obtained by LED-TOF is close to that of Laser-COF. Both Laser-TOF and LED-TOF can greatly improve the sensitivity of detection in CE. TOF has the major attribute of collecting and focusing the excitation light intensity. Thus, the sensitivity obtained by LED-TOF without focusing lens is just same as that of LED-COF with a focusing lens. This demonstrates that the CE system can be further simplified by eliminating the focusing lens for excitation light. LED-TOF-CE and LED-COF-CE system were applied to the separation and determination of RF in real sample (green tea), respectively. The tapered fiber optic-induced fluorescence detection system in CE is an ideal tool for trace analysis.

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Modeling of Tapered Fiber-Optic Surface Plasmon Resonance Sensor With Enhanced Sensitivity

Cited by 65 publications

References 10 publications

Surface Plasmon Resonance‐Based Fiber Optic Sensors: Principle, Probe Designs, and Some Applications

Surface Plasmon Resonance‐Based Fiber Optic Sensors: Principle, Probe Designs, and Some Applications

Exposed core microstructured optical fiber surface plasmon resonance biosensor

Sensitivity enhancement of fluorescence detection in CE by coupling and conducting excitation light with tapered optical fiber

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