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Design and Optimization of Photonic Crystal Fiber Based Sensor for Gas Condensate and Air Pollution Monitoring

Photonic Sensors 2017年第3期7卷 234-245页

作者： md. Ibadul islam Kawsar AHMED Shuvo SEN Sawrab CHOWDHURY Bikash Kumar PAUL md. shadidul islam Mohammad Badrul Alam MIAH Sayed ASADUZZAMAN Department of Information and Communication Technology (ICT) Mawlana Bhashani Science and Technology University Santosh Tangail 1902 Bangladesh Group of Bio-photomatix Tangail 1902 Bangladesh Department of Software Engineering (SWE) Daffodil International University Sukrabad Dhaka 1207 Bangladesh

In this paper, a hexagonal shape photonic crystal fiber （H-PCF） has been proposed as a gas sensor of which both micro-structured core and cladding are organized by circular air cavities. The reported H-PCF has a single layer circular core which is surrounded by a five-layer hexagonal cladding. The overall pretending process of the H-PCF is completed by using a full vectorial finite element method （FEM） with perfectly matched layer （PML） boundary condition. All geometrical parameters like diameters and pitches of both core and cladding regions have fluctuated with an optimized structure. After completing the numerical analysis, it is clearly visualized that the proposed H-PCF exhibits high sensitivity with low confinement loss. The investigated results reveal the relative sensitivity of 56.65% and confinement loss of 2.31×10^-5 dB/m at the 1.33%tm wavelength. Moreover, effective area, nonlinearity, and V-parameter of the suggested PCF are also briefly described.

关键词： Relative sensitivity confinement loss gas sensor effective area nonlinearity and photonic crystal fiber

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Alcohol Sensing Over O＋E＋S＋C＋L＋U Transmission Band Based on Porous Cored Octagonal Photonic Crystal Fiber

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Photonic Sensors 2017年第2期7卷 123-130页

作者： Bikash Kumar PAUL md. shadidul islam Kawsar AHMED Sayed ASADUZZAMAN Department of Information and Communication Technology Mawlana Bhashani Science and Technology University Santosh Tangail-1902 Bangladesh Group of Bio-Photomatriz Tangail-1902 Bangladesh Department of Software Engineering Daffodil International University Sukrabad Dhaka Bangladesh

A micro structure porous cored octagonal photonic crystal fiber （P-OPCF） has been proposed to sense aqueous analysts （alcohol series） over a wavelength range of 0.80 μm to 2.0 μm. By implementing a full vectorial finite element method （FEM）, the numerical simulation on the proposed O-PCF has been analyzed. Numerical investigation shows that high sensitivity can be gained by changing the structural parameters. The obtained result shows the sensitivities of 66.78%, 67.66%, 68.34%, 68.72%, and 69.09%, and the confinement losses of 2.42×10^-10 dB/m, 3.28x×10^-11 dB/m, 1.21 ×10^-6 dB/m, 4.79×10^-10 dB/m, and 4.99×10^-9 dB/m at the 1.33 ktm wavelength for methanol, ethanol, propanol, butanol, and pentanol, respectively can satisfy the condition of much legibility to install an optical system. The effects of the varying core and cladding diameters, pitch distance, operating wavelength, and effective refractive index are also reported here. It reflects that a significant sensitivity and low confinement loss can be achieved by the proposed P-OPCE The proposed P-OPCF also covers the wavelength band （O＋E＋S＋C＋L＋U）. The investigation also exhibits that the sensitivity increases when the wavelength increases like SO-band〈SE-band 〈SS-band 〈 SC-band 〈SL-band 〈SU-band. This research observation has much pellucidity which has remarkable impact on the field of optical fiber sensor.

关键词： Porous cored OPCF alcohol sensor sensitivity confinement loss transmission band

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