Modeling the evanescent wave and mode interactions of different fiber taper profile in microstructured optical fiber / Siti Noraina Sanusidin

Single mode fiber (SMF) is one of the most broadly used groups of optical fiber in fiber sensing applications. In optical fiber, single mode fiber (SMF), multimode fiber (MMF) are contained within a pure silica or glass. Photonic crystal fiber (PCFs) is a microstructure optical fibers or holey fiber...

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Main Author:	Sanusidin, Siti Noraina
Format:	Thesis
Language:	English
Published:	2020
Subjects:	Optical fibers
Online Access:	https://ir.uitm.edu.my/id/eprint/59860/1/59860.pdf
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spelling	my-uitm-ir.598602022-05-18T07:44:05Z Modeling the evanescent wave and mode interactions of different fiber taper profile in microstructured optical fiber / Siti Noraina Sanusidin 2020-04 Sanusidin, Siti Noraina Optical fibers Single mode fiber (SMF) is one of the most broadly used groups of optical fiber in fiber sensing applications. In optical fiber, single mode fiber (SMF), multimode fiber (MMF) are contained within a pure silica or glass. Photonic crystal fiber (PCFs) is a microstructure optical fibers or holey fibers and it is also widely used in optical sensing. PCFs descent into two basic categories, an index-guiding PCF, and guiding based on a photonic bandgap (PBG). This dissertation focusses on the simulation of lightwave propagation in planar photonic waveguides, which include investigation on single mode tapered fiber (SMTF) refractive index sensor versus taper waist length at fixed taper angle, investigation on SMTF refractive index sensor versus taper angle at constant waist length, investigation on single mode-multimode-single mode (SMS) refractive index sensor and investigation on transverse scattering refractive index sensor. In the design and simulations of tapered fiber structure, 3-D scalar and 2-D radial symmetry beam propagation method (BeamProp-RSOFT) were used. It is because cylindrical coordinate modelling allows an accurate representation of the fiber structure and accurate solution may be obtained. In the transverse scattering problem, the PCF structure was modeled and simulated using finite difference time domain method for refractive index sensor. The result for investigation of tapered single mode fiber refractive index sensor sensitivity vs taper waist length at waist length, L=20000μm and investigation of tapered single mode refractive index sensor sensitivity vs taper angle at taper angle, α=1.05° is 273.32 and 277.92 nmRIU-1 respectively. For both results, the technique used was PCA technique. The SMS structure design give the sensitivity of 78.2 nm/RIU. For the transverse scattering analysisit was concluded that, untapered produce the highest sensitivity at 7.45 a.u/RIU. In summary, for tapered single mode fiber interferometric protein sensor, the analysis was computed between wavelengths 1.49 – 1.65 μm. The tapered single mode fiber works well with changes of refractive index. Hence, the PCA analysis give the maximum sensitivity compare with transmission spectrum wavelength shift. As for the analysis of the transverse scattering transmission spectrum, the PCF works equally well in tapered and untapered conditions for the correlation of the transverse scattering against the RI change in crystal holes. Hence, there is a relationship between the transmission spectra and the RI in the liquid filled PCF for the taper ratio of analysis over the wavelength range of 0.6 μm to 1.7 μm. Hence, this technique can be used as a RI sensor. We have shown that the sensitivity of the RI sensor base of transverse transmission spectrum is the most sensitive in the untapered PCF. 2020-04 Thesis https://ir.uitm.edu.my/id/eprint/59860/ https://ir.uitm.edu.my/id/eprint/59860/1/59860.pdf text en public masters Universiti Teknologi MARA Faculty of Electrical Engineering Md. Ali, Mas Izyani (Dr.)
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Md. Ali, Mas Izyani (Dr.)
topic	Optical fibers
spellingShingle	Optical fibers Sanusidin, Siti Noraina Modeling the evanescent wave and mode interactions of different fiber taper profile in microstructured optical fiber / Siti Noraina Sanusidin
description	Single mode fiber (SMF) is one of the most broadly used groups of optical fiber in fiber sensing applications. In optical fiber, single mode fiber (SMF), multimode fiber (MMF) are contained within a pure silica or glass. Photonic crystal fiber (PCFs) is a microstructure optical fibers or holey fibers and it is also widely used in optical sensing. PCFs descent into two basic categories, an index-guiding PCF, and guiding based on a photonic bandgap (PBG). This dissertation focusses on the simulation of lightwave propagation in planar photonic waveguides, which include investigation on single mode tapered fiber (SMTF) refractive index sensor versus taper waist length at fixed taper angle, investigation on SMTF refractive index sensor versus taper angle at constant waist length, investigation on single mode-multimode-single mode (SMS) refractive index sensor and investigation on transverse scattering refractive index sensor. In the design and simulations of tapered fiber structure, 3-D scalar and 2-D radial symmetry beam propagation method (BeamProp-RSOFT) were used. It is because cylindrical coordinate modelling allows an accurate representation of the fiber structure and accurate solution may be obtained. In the transverse scattering problem, the PCF structure was modeled and simulated using finite difference time domain method for refractive index sensor. The result for investigation of tapered single mode fiber refractive index sensor sensitivity vs taper waist length at waist length, L=20000μm and investigation of tapered single mode refractive index sensor sensitivity vs taper angle at taper angle, α=1.05° is 273.32 and 277.92 nmRIU-1 respectively. For both results, the technique used was PCA technique. The SMS structure design give the sensitivity of 78.2 nm/RIU. For the transverse scattering analysisit was concluded that, untapered produce the highest sensitivity at 7.45 a.u/RIU. In summary, for tapered single mode fiber interferometric protein sensor, the analysis was computed between wavelengths 1.49 – 1.65 μm. The tapered single mode fiber works well with changes of refractive index. Hence, the PCA analysis give the maximum sensitivity compare with transmission spectrum wavelength shift. As for the analysis of the transverse scattering transmission spectrum, the PCF works equally well in tapered and untapered conditions for the correlation of the transverse scattering against the RI change in crystal holes. Hence, there is a relationship between the transmission spectra and the RI in the liquid filled PCF for the taper ratio of analysis over the wavelength range of 0.6 μm to 1.7 μm. Hence, this technique can be used as a RI sensor. We have shown that the sensitivity of the RI sensor base of transverse transmission spectrum is the most sensitive in the untapered PCF.
format	Thesis
qualification_level	Master's degree
author	Sanusidin, Siti Noraina
author_facet	Sanusidin, Siti Noraina
author_sort	Sanusidin, Siti Noraina
title	Modeling the evanescent wave and mode interactions of different fiber taper profile in microstructured optical fiber / Siti Noraina Sanusidin
title_short	Modeling the evanescent wave and mode interactions of different fiber taper profile in microstructured optical fiber / Siti Noraina Sanusidin
title_full	Modeling the evanescent wave and mode interactions of different fiber taper profile in microstructured optical fiber / Siti Noraina Sanusidin
title_fullStr	Modeling the evanescent wave and mode interactions of different fiber taper profile in microstructured optical fiber / Siti Noraina Sanusidin
title_full_unstemmed	Modeling the evanescent wave and mode interactions of different fiber taper profile in microstructured optical fiber / Siti Noraina Sanusidin
title_sort	modeling the evanescent wave and mode interactions of different fiber taper profile in microstructured optical fiber / siti noraina sanusidin
granting_institution	Universiti Teknologi MARA
granting_department	Faculty of Electrical Engineering
publishDate	2020
url	https://ir.uitm.edu.my/id/eprint/59860/1/59860.pdf
_version_	1783735063517593600

Modeling the evanescent wave and mode interactions of different fiber taper profile in microstructured optical fiber / Siti Noraina Sanusidin

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