Characteristics of plasmon coupling mode in SPR based LPFG

Gu, Zhengtian; Lan, Jinlong; Gao, Kan

doi:10.1007/s11082-016-0452-y

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…A necessary mechanism for the SPR effect is to have a sufficiently strong evanescent wave to excite the SPW (surface plasmon wave). When the propagation constant of the light wave in the cladding matches that of the SPW, the energy of the cladding mode will be converted into the energy of SPW, so that the light energy of the corresponding band of the transmission spectrum will suddenly drop and a resonance absorption peak will appear, whose position is the SPR resonance wavelength [ 45 , 46 , 47 ]. Therefore, the fiber optic sensor needs to be configured with a special structure to stimulate a strong evanescent wave, which is described in Section 2.4 .…”

Section: Sensors Coated With the Pdmsmentioning

confidence: 99%

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A Review of Coating Materials Used to Improve the Performance of Optical Fiber Sensors

Yang

Wang

et al. 2020

Sensors

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In order to improve the performance of fiber sensors and fully tap the potential of optical fiber sensors, various optical materials have been selectively coated on optical fiber sensors under the background of the rapid development of various optical materials. On the basis of retaining the original characteristics of the optical fiber sensors, the coated sensors are endowed with new characteristics, such as high sensitivity, strong structure, and specific recognition. Many materials with a large thermal optical coefficient and thermal expansion coefficients are applied to optical fibers, and the temperature sensitivities are improved several times after coating. At the same time, fiber sensors have more intelligent sensing capabilities when coated with specific recognition materials. The same/different kinds of materials combined with the same/different fiber structures can produce different measurements, which is interesting. This paper summarizes and compares the fiber sensors treated by different coating materials.

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Section: Sensors Coated With the Pdmsmentioning

confidence: 99%

“…However, the special fiber structure will not only destroy the mechanical strength of the fiber but also increase the difficulty of sensor preparation. LPFG with an original characteristic of the strong evanescent wave is more suitable to be combined with the SPR principle [ 45 , 46 , 47 , 48 ].…”

Section: Sensors Coated With the Pdmsmentioning

confidence: 99%

A Review of Coating Materials Used to Improve the Performance of Optical Fiber Sensors

Yang

Wang

et al. 2020

Sensors

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“…The same authors provide also a very good review on the strain transfer theory of fiber optics [26]. In several studies, the Surface Plasmon Resonance (SPR) technique was utilized to improve the sensitivity and durability of the sensors [27][28][29][30][31][32][33]. The purpose of enhancing the sensitivity and durability of the sensor is to enhance the key parameters of the system, e.g.…”

Section: Introductionmentioning

confidence: 99%

Coating effects of a strain sensor on durability and sensitivity using the fiber loop ringdown spectroscopy technique

Kaya,

Esenturk,

Asici

et al. 2024

Phys. Scr.

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A sensor region in a single-mode optical fiber loop was created and utilized in order to study the coating effect on sensor durability and system sensitivity by the Fiber Loop Ringdown Spectroscopy (FLRDS) technique. The sensor system was simply designed without any additional optical components. The bending loss theory in the single-mode fiber (SMF) was taken into account in data calculation. After stretching was performed on 10.0 cm long coated and noncoated sensorheads from the mid-points, the strain detection limits were determined as 5.3345 με and 6.7497 με with bare and coated sensorheads, respectively. The purpose of this study is to analyze the effect of N,N-Diethyl-p-phenylenediamine (NDPD) coating of the sensorhead on the sensor durability and sensitivity. The baseline stability of the system was obtained as 1.18% by considering a hundred consecutive data. Regarding to obtained results, the difference between calculated total optical losses of FLRDS systems with noncoated and NDPD coated sensorheads shows that coating sensorhead enhanced the sensor durability and the system sensitivity. An FLRDS system with high sensitivity, simple design and easy setup offers real-time measurement with continuous monitoring and provides advantages on durability by modification the sensorhead such as NDPD coating. Due to its attractive features such as low cost, simplicity, easy setup, high sensitivity, increased durability and continuous monitoring, an FLRDS system has a wide range of application areas in structural health monitoring, transportation, early detection, biomedical, chemical trace elements, rail and asphalt applications for continuous monitoring in a real-time merit.

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“…Compared to the FBG (a grating period of a few hundred nanometers) [ 10 , 11 ], LPFG has a longer grating period (a few hundred microns) [ 12 , 13 ], which can couple more energy of the fiber core guide mode into the co-propagating cladding mode, and hence further improve the excitation efficiency of the SPR [ 9 ]. It has been widely reported that LPFG SPR sensors possess impressive detection sensitivity [ 9 , 14 , 15 ]. However, further improvement of the sensitivity is essentially limited due to the fact that the metals cannot effectively adsorb the molecules because of their high surface inertness and intrinsic hydrophobic.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Long-Period Fiber Grating Surface Plasmon Resonance Sensor for High-Sensitivity Gas Sensing

Wei

Nong

Zhang

et al. 2016

Sensors

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A graphene-based long-period fiber grating (LPFG) surface plasmon resonance (SPR) sensor is proposed. A monolayer of graphene is coated onto the Ag film surface of the LPFG SPR sensor, which increases the intensity of the evanescent field on the surface of the fiber and thereby enhances the interaction between the SPR wave and molecules. Such features significantly improve the sensitivity of the sensor. The experimental results demonstrate that the sensitivity of the graphene-based LPFG SPR sensor can reach 0.344 nm%−1 for methane, which is improved 2.96 and 1.31 times with respect to the traditional LPFG sensor and Ag-coated LPFG SPR sensor, respectively. Meanwhile, the graphene-based LPFG SPR sensor exhibits excellent response characteristics and repeatability. Such a SPR sensing scheme offers a promising platform to achieve high sensitivity for gas-sensing applications.

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Characteristics of plasmon coupling mode in SPR based LPFG

Cited by 7 publications

References 7 publications

A Review of Coating Materials Used to Improve the Performance of Optical Fiber Sensors

A Review of Coating Materials Used to Improve the Performance of Optical Fiber Sensors

Coating effects of a strain sensor on durability and sensitivity using the fiber loop ringdown spectroscopy technique

Graphene-Based Long-Period Fiber Grating Surface Plasmon Resonance Sensor for High-Sensitivity Gas Sensing

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