Manifestation of a highly sensitive evanescent wave absorption-based refractive index sensor realized by radiating with an optical Airy beam

Datta, Arijit; Saha, Ardhendu

doi:10.1007/s11082-021-02794-2

Cited by 10 publications

(3 citation statements)

References 57 publications

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“…Firstly, a surrounding domain is necessary to better imitate actual environments wherein the evanescent wave is exposed to the surrounding medium (air) although no modification is made to the device [6]. Secondly, a perfectly matched layer (PML) is necessary since boundary condition is applied to the simulation [10,11]. Consequently, the results obtained without considering the actual environment and boundary condition brought about a slightly different calculated and simulated NCF length, indicating imprecision.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Self-Image Interference in Single Mode-No-Core-Single Mode Fiber with COMSOL Multiphysics®

Razali

Lokman

Zuikafly

et al. 2022

J. Phys.: Conf. Ser.

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Self-image interference in a single mode-no-core-single mode fiber plays an important role especially for length optimization before acting as a sensor. The interference can be observed through optical simulation software. Past literature has successfully demonstrated the interference via COMSOL Multiphysics®, but the simulation was not restricted to the use of important domains and settings such as perfectly matched layer and surrounding domain causing imprecise simulation results. This paper proposes a simulation of self-image interference in a single mode-no-core-single mode fiber by using the wave-optics module in COMSOL Multiphysics® software. The beam propagation method is used to observe the self-image interference for different self-image indexes ranging from one to four indexes while the self-image length is obtained from the theoretical calculation before a simulation is carried out. The results show that accurate results can be obtained with restricted simulation settings. The number of the self-image index and self-image length produced by the simulation are similar to the calculation. The self-image point is located exactly at the calculated length with a four-decimal point 0.0000 difference, thus overcoming the limitation of the simulated previous work. In the future, the simulation settings and results can be used for reference to simulate the single mode- no-core-single mode fiber structure.

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Section: Introductionmentioning

confidence: 99%

Simulation of Self-Image Interference in Single Mode-No-Core-Single Mode Fiber with COMSOL Multiphysics®

Razali

Lokman

Zuikafly

et al. 2022

J. Phys.: Conf. Ser.

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“…The extent of light absorption depends on the dimension/material of sensor device, the operating wavelength, and the material to be sensed. The authors in Datta et al 2021;Cherouana et al 2019) have presented the idea of an evanescent field based photonic gas sensor using different types of photonic waveguides, namely strip, rib, and slot in the mid-infrared region. The percentage of evanescent field/light in upper cladding/slot region of the photonic waveguide changes during its interaction with the molecules of the sensing material.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of different slot waveguide structures for evanescent field based gas sensor applications

Chandra

Ranjan

2021

Opt Quant Electron

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Slot waveguide has emerged as a potential candidate for the design of evanescent field absorption based photonic gas sensors, optical quantum information applications, etc. In this paper, three different slot waveguide structures, i.e., conventional slot, partial-strip-loaded slot, and full-strip-loaded slot waveguides have been explored to analyze their sensing performance for the methane gas. As the methane gas has the peak absorption at around 3.31 µm, therefore, this has been considered as the operating wavelength for the analysis. In anticipation of improvement in evanescent field ratio in slot region and hence, the sensing capabilities of the gas sensor, the slot waveguide structures have been designed by depositing the germanium layer over the calcium fluoride in different manners. To realize the significant evanescent field and sensitivity along with relatively low propagation loss, the suitable dimension of the slot waveguide structures has been chosen very judiciously. Several waveguide parameters, such as evanescent field ratio, propagation loss, and sensitivity have been chosen for the analysis and comparison of slot waveguide structures, by varying the arm-width and thickness of germanium layer. Simulation results have demonstrated that the full-striploaded slot waveguide has the superior performance in terms of higher evanescent field and higher sensitivity, which is followed by the partial-strip-loaded slot waveguide, even for the fixed target value of propagation loss. Moreover, the current analysis may be extended for the design of suitable photodetector that can further enhance the performance of the gas sensor.

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“…Arijit Datta1 and Ardhendu Saha presented a theoretical model to calculate the optical transmission in a transmissive optical fibre sensor when an Airy beam is travelling in its core. Their model was based on numerical approaches and they used commercially software (Mode solution, Lumerical Inc.) to solve the problem [33]. Literature review shows that there are few reports on the development of the transmissive optical fibre sensor theory.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of transmissive modified cladding optical fibre sensors

Jahromi

2021

IET Optoelectronics

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Optical fibre sensors with modified cladding have been a topic of great interest for decades. Thanks to the new techniques of fabricating nanostructured films, this interest has been renewed. Although there have been many increases in published experimental research, no comprehensive theoretical formulation of the structure is reported in the literature. In this study, a general theory for transmissive modified cladding optical fibre sensors is presented. The model is formulated based on the electromagnetic fields and optical power in the core and cladding of a step-index fibre. The model considers various parameters, especially the radius of the optical fibre core, modified cladding refractive index, and light wavelength. The sensitivity, response, and optical transmission of the sensor are analysed as a function of the parameters. The analyses show that optical transmission reduces dramatically when the modified cladding refractive index approaches the refractive index of the core of the fibre and results in higher sensor response and sensitivity. Increasing the core radius of the fibre will result in lower sensor response with higher sensitivity. Both parameters will increase for a light with a larger wavelength. The results are in good agreement with experimental evidence.

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Manifestation of a highly sensitive evanescent wave absorption-based refractive index sensor realized by radiating with an optical Airy beam

Cited by 10 publications

References 57 publications

Simulation of Self-Image Interference in Single Mode-No-Core-Single Mode Fiber with COMSOL Multiphysics®

Simulation of Self-Image Interference in Single Mode-No-Core-Single Mode Fiber with COMSOL Multiphysics®

Performance analysis of different slot waveguide structures for evanescent field based gas sensor applications

Performance analysis of transmissive modified cladding optical fibre sensors

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