A Review of Sensitivity Enhancement in Interferometer-Based Fiber Sensors

Wen, Zengrun; Guan, Ziqing; Dong, Jingru; Li, Hongxin; Cai, Yangjian; Gao, Song

doi:10.3390/s22072506

Cited by 8 publications

(3 citation statements)

References 74 publications

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“…The proposed method for measuring the refractive index includes three stages. At first, the phase ϕ (z 2 ) of the laser beam passed through the lens (figure 1) is calculated using equation (5).…”

Section: Methods and Approachesmentioning

confidence: 99%

“…Such parameters as reflection and absorption coefficients, dispersion (Abbe coefficient) and other primary characteristics of optical media are determined by the refractive index. Although optical methods of refractometry are still the main way to measure the refractive index [1], other approaches have been developed to solve this problem [2][3][4][5][6][7][8]. Among them, the methods based on the application of the transport-of-intensity equation (TIE) deserve special attention [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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The optical refractometry using transport-of-intensity equation

Gritsenko¹,

Kovalev²,

Stsepuro³

et al. 2022

Laser Phys. Lett.

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A development of a method for measuring the refractive index of optical media based on the transport-of-intensity equation (TIE) is proposed. The method requires only a complementary metal-oxide semiconductor (CMOS) camera, which registers intensity distributions in several planes. The obtained intensity distributions are used to solve the TIE, known as a non-interferometric and deterministic method of measuring the phase of a light wave. Simple physical relations connecting the phase of the light wave that has passed through an optical medium and its refractive index allows to determine the latter. The results of the experiment confirm the applicability of the proposed method to the problems of optical refractometry.

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Section: Methods and Approachesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The optical refractometry using transport-of-intensity equation

Gritsenko¹,

Kovalev²,

Stsepuro³

et al. 2022

Laser Phys. Lett.

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“…The present Review covers an exhaustive survey of fundamentals and technological advancements in fiber optic interferometric sensors, especially for biosensing applications. There are few review articles available in the literature, they are but limited to the physical measurements or some extent for chemical sensors. − For fundamental aspects, five types of interferometric-based biochemical sensors, namely Mach–Zehnder interferometer, Fabry–Perot interferometer, Michelson interferometer, Sagnac interferometer, and biolayer interferometer, are overviewed in terms of sensing structure, operating principles, and biosensing application fields. Furthermore, the advantages and disadvantages of these interferometric-based biochemical sensors are evaluated in this paper, covering examples of the various reported studies.…”

Section: Introductionmentioning

confidence: 99%

Label-Free Biochemical Sensing Using Processed Optical Fiber Interferometry: A Review

Jha,

Gorai,

Shrivastav

et al. 2024

ACS Omega

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Over the last 20 years, optical fiber-based devices have been exploited extensively in the field of biochemical sensing, with applications in many specific areas such as the food processing industry, environmental monitoring, health diagnosis, bioengineering, disease diagnosis, and the drug industry due to their compact, label-free, and highly sensitive detection. The selective and accurate detection of biochemicals is an essential part of biosensing devices, which is to be done through effective functionalization of highly specific recognition agents, such as enzymes, DNA, receptors, etc., over the transducing surface. Among many optical fiber-based sensing technologies, optical fiber interferometry-based biosensors are one of the broadly used methods with the advantages of biocompatibility, compact size, high sensitivity, high-resolution sensing, lower detection limits, operating wavelength tunability, etc. This Review provides a comprehensive review of the fundamentals as well as the current advances in developing optical fiber interferometry-based biochemical sensors. In the beginning, a generic biosensor and its several components are introduced, followed by the fundamentals and state-of-art technology behind developing a variety of interferometry-based fiber optic sensors. These include the Mach−Zehnder interferometer, the Michelson interferometer, the Fabry−Perot interferometer, the Sagnac interferometer, and biolayer interferometry (BLI). Further, several technical reports are comprehensively reviewed and compared in a tabulated form for better comparison along with their advantages and disadvantages. Further, the limitations and possible solutions for these sensors are discussed to transform these in-lab devices into commercial industry applications. At the end, in conclusion, comments on the prospects of field development toward the commercialization of sensor technology are also provided. The Review targets a broad range of audiences including beginners and also motivates the experts helping to solve the real issues for developing an industry-oriented sensing device.

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