Evanescent Field Study on a U-Shaped Silica Fiber Absorption Sensor Using Non-Sequential Ray Tracing

Rashid, Affa Rozana Abdul; Mokhtar, Wan Maisarah; Dasuki, Karsono Ahmad; Ehsan, Abang Annuar; Shaari, Sahbudin

doi:10.4028/www.scientific.net/ssp.268.413

SSP

2017

DOI: 10.4028/www.scientific.net/ssp.268.413

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Evanescent Field Study on a U-Shaped Silica Fiber Absorption Sensor Using Non-Sequential Ray Tracing

Affa Rozana Abdul Rashid

Wan Maisarah Mokhtar

Karsono Ahmad Dasuki

et al.

Abstract: The ray tracing of unclad U-shape multimode fiber optic is examined by using Zemax simulation have been proposed. The influence of the geometry of sensing region such as absorbing medium refractive index, n2, shape of fiber and the bending radius is analyzed. Number of analysis ray is determined and the value of n2 is varied at 1, 1.3314, 1.359, 1.36, 1.37 and 1.4. The intensity of light propagate inside the fiber is reducing at high n2 and this graph pattern is supported by experimental result. A U-shaped sen… Show more

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Cited by 3 publications

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“…5, the sensitivity of fixed waist diameter of 0.5 mm with different unclad length is higher for 3 cm that is 0.0936 μW/% and slope linearity 97.91% compared with 1 cm that is 0.0692 μW/% and slope linearity 94.53%. Therefore, POF sensor with longer unclad length have higher sensitivity [9]. This is in line with Fig.…”

supporting

confidence: 88%

Plastic Optical Fiber Sensor for Detection of Ethanol Concentrations

Surani

Rashid

Arsad

et al. 2020

SSP

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An optimized study of tapered polymer optical fiber (POF) for measurement of different concentration of ethanol in deionized water (0.5%-3.5%) is proposed and demonstrated. This sensor operated based on evanescent wave absorption principle. The cladding of PMMA based POF is removed using organic solvents which can be used to create tapered POF. The unclad length around 1 cm and 3 cm as well as the waist diameters of POF in the range of 5 mm and 8 mm were compared for their efficiency as an ethanol sensor based on power output ratio values. Tapered POF with smaller waist diameter and longer tapered length showed higher sensitivity as ethanol sensor. Therefore, by tailoring the length and tapered diameter of POF, high sensitivity of ethanol sensor can be fabricated.

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supporting

confidence: 88%

Plastic Optical Fiber Sensor for Detection of Ethanol Concentrations

Surani

Rashid

Arsad

et al. 2020

SSP

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Study on the Sensitivity of Bare Fiber Bragg Grating for Ultrasonic Frequencies Response Under Various Temperature

Mukhtar

Zailani

2020

J. Phys.: Conf. Ser.

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This work presents a study on the sensitivity of bare fiber Bragg grating (FBG) to detect ultrasonic frequencies under various temperature. Two infrared (IR) laser with excitation wavelength, λ=1310nm and λ=1550nm were employed. Various types of FBG with operating wavelength of 1546nm, 1550nm and 1554nm were used to identify the optimum design of sensor in detecting range of ultrasonic frequencies between 5kHz until 30kHz under various surrounding temperature from 20°C until 30°C. The principle of FBG vibration detection lies in the fact that spectral shift would occur due to the acoustic-induced variations in the medium. In this study, the ultrasonic signal had been investigated by monitoring the amplitude of optical output power. At 30°C, the bare FBG with operating wavelength of 1554nm using 1310nm light source exhibits the optimum performance in detecting ultrasonic vibration frequency, in which its sensitivity was obtained as ∆P=0.10dBm. We believe that the sensitivity of the proposed sensor can be enhanced by introduce nanomaterials onto the FBG or by altering the physical structure of FBG.

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Hexagonal rare-earth-doped double-clad chalcogenide glass fiber with high absorption efficiency

Wu¹,

Wang²,

Wang³

et al. 2022

Opt. Mater. Express

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The difficulty in the preparation of high-quality rare-earth-doped double-clad chalcogenide glass fiber with high absorption of pumping energy is one of the major issues in the development of mid-infrared fiber lasers. In this study, we solve this problem by changing the inner cladding structure of the fiber. The absorption efficiencies of several typical inner cladding shapes were compared and analyzed by the ray tracing method. The result shows that the hexagonal inner cladding fiber has the best absorption efficiency. For the first time, we developed an Er3+-doped Ge-Ga-Sb-S double-clad chalcogenide glass fiber with a hexagonal inner cladding via the fiber extrusion method, and experimentally demonstrated a higher absorption efficiency in the fiber compared with those in the traditional circular double-clad fibers. Such a hexagonal double-clad chalcogenide glass fiber possesses the potentials for developing high-efficiency mid-infrared fiber lasers.

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Evanescent Field Study on a U-Shaped Silica Fiber Absorption Sensor Using Non-Sequential Ray Tracing

Cited by 3 publications

References 8 publications

Plastic Optical Fiber Sensor for Detection of Ethanol Concentrations

Plastic Optical Fiber Sensor for Detection of Ethanol Concentrations

Study on the Sensitivity of Bare Fiber Bragg Grating for Ultrasonic Frequencies Response Under Various Temperature

Hexagonal rare-earth-doped double-clad chalcogenide glass fiber with high absorption efficiency

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