Experimental Investigation of Fused Biconical Fiber Couplers for Measuring Refractive Index Changes in Aqueous Solutions

Hernández-Arriaga, M. V.; Bello-Jiménez, M.; Rodríguez-Cobos, A.; Andrés, Miguel V.

doi:10.1109/jsen.2015.2475320

Cited by 7 publications

(7 citation statements)

References 21 publications

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“…Most published works were centered on the refractive index measurement [11][12][13][14][15]. Also, researchers were interested in measuring the solute concentration in aqueous solutions [15][16][17][18][19]. Some methods to determine solute concentration are based on the relationship between refractive index and solute concentration [16,17,19,20].…”

Section: Introductionmentioning

confidence: 99%

Tip optical fiber refractive index sensor based on a thin copper film

Lopez-Dieguez

Estudillo‐Ayala

Vazquez

et al. 2021

Supl. Rev. Mex. Fis.

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We report a refractive index tip fiber optic sensor based on a modal interferometer coated with a thin copper film. This device can be used for solute concentration in aqueous mixture measurement. The copper film increases the device reflectivity and, as a result, increases the multimodal interference pattern visibility. To validate the sensor device, different water-glycerol weight concentrations were used in the range from 0 to 45 Glycerol %. The recorded spectral responses show a redshifting, and a sensitivity of 19 pm / (Glycerol % by weight) from 0 to 18 % and 4.7 pm / (Glycerol % by weight) from 18 to 45 % was achieved. Besides, using a phase analysis we calculated a sensitivity of -15 rad/RIU.

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Section: Introductionmentioning

confidence: 99%

Tip optical fiber refractive index sensor based on a thin copper film

Lopez-Dieguez

Estudillo‐Ayala

Vazquez

et al. 2021

Supl. Rev. Mex. Fis.

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“…After that, numerous physical, chemical, and biosensors based on MFC have been demonstrated. Refractive index (RI) [ 25 , 28 , 29 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 ], force [ 50 ], twist [ 27 , 51 ], vibration [ 52 ], and strain [ 53 ] have direct effect on the signal transmission of MFC waist region. By covering and well packaging the waist region with functional materials, monitoring of temperature [ 23 , 24 , 28 , 31 , 32 , 37 , 42 , 43 , 46 , 54 , 55 , 56 , 57 , 58 , 59 , 60 ], humidity [ 31 , 57 , 61 , 62 , 63 , 64 , 65 , 66 ], magnetic field [ 30 , 67 , 68 ,…”

Section: Introductionmentioning

confidence: 99%

State-of-the-Art Optical Microfiber Coupler Sensors for Physical and Biochemical Sensing Applications

et al. 2020

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An optical fiber coupler is a simple and fundamental component for fiber optic technologies that works by reducing the fiber diameter to hundred nanometers or several micrometers. The microfiber coupler (MFC) has regained interest in optical fiber sensing in recent years. The subwavelength diameter rationales vast refractive index (RI) contrast between microfiber “core” and surrounding “cladding”, a large portion of energy transmits in the form of an evanescent wave over the fiber surface that determines the MFC ultrasensitive to local environmental changes. Consequently, MFC has the potential to develop as a sensor. With the merits of easy fabrication, low cost and compact size, numerous researches have been carried out on different microfiber coupler configurations for various sensing applications, such as refractive index (RI), temperature, humidity, magnetic field, gas, biomolecule, and so on. In this manuscript, the fabrication and operation principle of an MFC are elaborated and recent advances of MFC-based sensors for scientific and technological applications are comprehensively reviewed.

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“…Con la introducción de nuevos medios de ganancia en las cavidades láser de fibrá optica, el acoplador debe ser objeto de constante desarrollo en su diseño con la finalidad de operar en diferentes longitudes de onda. No obstante, el alcance experimental del dispositivo contempla aplicaciones más complejas que la simple división de haces; un acoplador bicónico 2×2 (constituido por dos puertos de entrada y dos puertos de salida) fabricado mediante un proceso debidamente controlado, produce un espectro sinusoidal de transmisión dependiente de la longitud de onda de fabricación, de tal manera que una manipulación adecuada del proceso de fabricación puede permitir que los acopladores operen en una extensa gama de aplicaciones como divisores de polarización [7,8], filtros [9,10], sensores de fibraóptica [11][12][13] y componentes para el multiplexado de longitudes de onda (WDM, wavelength division multiplexer) [14,15], entre otros. En el caso específico de un WDM, estos dispositivos típicamente están constituidos por un puerto de entrada y dos puertos de salida, y una de sus aplicaciones más esenciales es en cavidades láser de fibraóptica, donde los haces de bombeo y señal se multiplexan para formar una cavidad todo-fibra.…”

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Estudio experimental de acopladores bicónicos de fibra óptica aplicados al desarrollo de multiplexores por división de longitud de onda

et al. 2018

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Se reporta un estudio experimental de la técnica de fabricación de acopladores bicónicos de fibraóptica y su aplicación al desarrollo de multiplexores por división de longitud de onda (WDM, wavelength division multiplexer). Los parámetros de fabricación requeridos para el WDM son obtenidos del análisis teórico de la respuesta espectral de un acoplador débilmente fusionado. Como caso particular, se reporta el desarrollo de un WDM 1550/1850 nm, el cual es un dispositivo fundamental en el desarrollo de láseres de fibraóptica dopada con Tulio. Las dimensiones finales del dispositivo son una longitud total de 36.3 mm, una cintura uniforme de 6.5 mm de largo con una sección transversal de 23 µm. El dispositivo exhibe bajas pérdidas por inserción de 0.17 dB, un espaciamiento entre canales de 303.52 nm y ancho de banda de ± 50 nm. Este trabajo establece una guía de fabricación para el desarrollo de acopladores y dispositivos WDM de fibraóptica. Descriptores: Acopladores bicónicos de fibra; multiplexación por división de longitud de onda; laser de fibra dopada de Tulio. An experimental study of the technique of fused biconical fiber couplers for the development of wavelength division multiplexers (WDM) is presented. The fabrication parameters required for the WDM are obtained from the theoretical analysis of the spectral response of a weakly fused coupler. As a particular case, the development of a 1550/1850 nm WDM is reported, which is a fundamental device in the implementation of Thulium-doped fiber lasers. The WDM has the total length of 36.3 mm, and a uniform tapered waist length of 6.5 mm with 23 µm of cross section. The device exhibits insertion losses of 0.17 dB, a channel spacing of 303.52 nm and a ± 50 nm bandwidth. This publication could be considered a guide for the development of fiber optic couplers and WDM devices.

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Experimental Investigation of Fused Biconical Fiber Couplers for Measuring Refractive Index Changes in Aqueous Solutions

Cited by 7 publications

References 21 publications

Tip optical fiber refractive index sensor based on a thin copper film

Tip optical fiber refractive index sensor based on a thin copper film

State-of-the-Art Optical Microfiber Coupler Sensors for Physical and Biochemical Sensing Applications

Estudio experimental de acopladores bicónicos de fibra óptica aplicados al desarrollo de multiplexores por división de longitud de onda

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