Ammonia gas detection using photonic crystal fiber with elliptical holes

Abbaszadeh, Aryan; Makouei, Somayeh; Meshgini, Saeed

doi:10.1117/1.oe.60.7.077105

Cited by 6 publications

(4 citation statements)

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“…This confinement loss can become severe when the cladding air holes are located very close to the core region, leading to a reduction in the effective refractive index contrast between the core and the cladding regions. Confinement loss can be calculated using 28 LC[dB/m]=8.686k0Im(neff)×106,where LC is confinement loss K0=2π/λ is the wave number and Im(neff) is the imaginary part of the effective refractive index.…”

Section: Mathematical Equations and Numerical Analysismentioning

confidence: 99%

Hollow core photonic crystal fiber based carbon monoxide sensor design applicable for hyperbilirubinemia diagnosis

2023

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.One of the modern ways to diagnose diseases is through exhale gas of patients, which is non-invasive and therefore desirable to doctors. The composition of exhaled breath contains valuable information for identifying hyperbilirubinemia disease. The accumulation of bilirubin and its lack of excretion causes jaundice, and the production of bilirubin has a direct relationship with exhaled carbon monoxide (CO). A CO diagnostic sensor based on a photonic crystal fiber (PCF) that can detect hyperbilirubinemia has been designed. This method can be used repeatedly to detect and treated jaundice in time. The PCF is designed as a hexagon. The holes in the cladding are circular and the holes in the core are circular and oval. Finite element method is used to do all the numerical simulations. COMSOL Multiphysics software was used to obtain the results. In this setup, CO absorption wavelength is 1.567 μm, and the relative sensitivity of 64.28% is reported with confinement loss of 3.81 × 10 − 3 dB / m.

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Section: Mathematical Equations and Numerical Analysismentioning

confidence: 99%

Hollow core photonic crystal fiber based carbon monoxide sensor design applicable for hyperbilirubinemia diagnosis

2023

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“…1. Real-time monitoring of harmful substances, volatile organic compound (VOC), 16 – 18 COx, 19 – 21 NOx, 22 – 24 SO2, 25 – 27 etc., 28 enables the provision of more accurate air quality information, facilitating effective measures for protection and improvement. Additionally, online monitoring of heavy metals, dissolved oxygen, pH, organic/inorganic pollutants, microorganisms, and other indicators in water is also of significant importance for ensuring water quality safety.…”

Section: Introductionmentioning

confidence: 99%

Optical fiber sensors for water and air quality monitoring: a review

Lyu,

Huang,

et al. 2023

Opt. Eng.

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Owing to their advantages of anti-electromagnetic interference, chemical resistance, high sensitivity, and fast response time, optical fiber sensors (OFSs) are widely used in biomedical, environmental monitoring, and food safety fields. We introduce the classification and principles of OFSs and summarize the applications and research progress of OFSs in water quality detection (heavy metals and microorganisms) and air quality monitoring (COx , NOx , and VOCs). Meanwhile, analytical performance, reliability, and environmental adaptability of OFSs are discussed and prospected.

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“…PCFs not only overcomes the shortcomings of traditional optical fiber, but also has some special characteristics [3]. Excellent light guiding characteristics can be achieved through some special structures, such as elliptical [4], hexagonal [5], octagonal [6], spiral [7] and circular cladding [8][9][10]. By controlling the size and spacing of holes, excellent characteristics can be fulfilled, such as strong confinement field [11], improved sensitivity [12], low confinement loss [13], ultra-flattened dispersion [14][15], higher birefringence [16], and enhanced nonlinear effects [17].…”

Section: Introductionmentioning

confidence: 99%

Characteristic Analysis and Structural Design of Photonic Crystal Fibers for Gas Sensing Applications

Zheng¹,

Liu²

2023

Preprint

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A total internal reflection photonic crystal fiber (PCF) based on hexagonal core is proposed for gas sensing in a specific wavelength range. The higher sensitivity and lower confinement loss were realized by the structure of the proposed PCF consists of two layers with circular holes rotated hexagonally around a core region and six slotted air-hole in the cladding based on numerical analysis. The simulation results show that the enhancement of the relative sensitivity has been done by enhancing the diameter of the hexagonal shape air-hole cladding (d1) and the hexagonal arranged holes around the central solid core (d0) in this design. Also, the confinement loss has been reduced by enhancing the ratio of length to width of slotted holes (l/w) and decreasing the cladding air-hole diameters (d1). As the refractive index increases, the wavelength shifts toward the long wavelength. And in a certain temperature range, the transmission characteristics of the device does not change with the temperature. The results are helpful for designing high performance PCF for gas sensing applications.

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Ammonia gas detection using photonic crystal fiber with elliptical holes

Cited by 6 publications

References 0 publications

Hollow core photonic crystal fiber based carbon monoxide sensor design applicable for hyperbilirubinemia diagnosis

Hollow core photonic crystal fiber based carbon monoxide sensor design applicable for hyperbilirubinemia diagnosis

Optical fiber sensors for water and air quality monitoring: a review

Characteristic Analysis and Structural Design of Photonic Crystal Fibers for Gas Sensing Applications

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