Tunable highly multimode polymer optical fibre power splitter / Nor Syafiqah Mohamed Kassim

Optical power splitter based-on polymer optical fibre (POF) is a crucial component in an optical short distance application that requires optical power splitting. The evolution of optical applications provides a large market for the optical power splitter; hence has created demand for variable optic...

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Main Author:	Mohamed Kassim, Nor Syafiqah
Format:	Thesis
Language:	English
Published:	2019
Subjects:	Optics Light
Online Access:	https://ir.uitm.edu.my/id/eprint/82323/1/82323.pdf
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id	my-uitm-ir.82323
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spelling	my-uitm-ir.823232024-05-18T15:31:27Z Tunable highly multimode polymer optical fibre power splitter / Nor Syafiqah Mohamed Kassim 2019 Mohamed Kassim, Nor Syafiqah Optics. Light Polymers. Macromolecules Optical power splitter based-on polymer optical fibre (POF) is a crucial component in an optical short distance application that requires optical power splitting. The evolution of optical applications provides a large market for the optical power splitter; hence has created demand for variable optical power splitter. The fixed power splitter device has been dominated the highly multimode waveguide area where it cannot be adjusted to amend once it had been fabricated. To the best of my knowledge, only two research works have been reported on tunable splitter device that employs POF. From the literatures, the tunable POF splitter device inherits slightly different splitting ratios, high loss, low controllable resolution and small variable range. The tunable splitter was developed based on angular misalignment technique within a hollow waveguide Y-junction, so predetermined power is allowed to split out asymmetrically to two output ports. The tunable power splitter was demonstrated based on the predefined end shape of POF and also compared to a standard design. The reshaping of fibre end from circular to rectangular cross section greatly reduces the interstitial space between POFs and mold-insert’s waveguide; hence reduce major loss. Two designs of optical power splitter of dynamic power tuning capability with low excess loss and high tuning resolution are presented. The splitters utilized Y-junction waveguide design and one without a junction. The splitter with no junction employing circular to rectangular POF converters achieved a lower excess loss of 0.7 dB for a 50:50 power-splitting compared to Y-junction splitter employed circular POFs achieved an excess loss of 1.68 dB. Non-sequential ray-tracing simulation and mathematical expression of both the splitter designs are confirmed by theoretical investigation as well. The tunable splitter device was tested as vibration detection and surface profiler. There are three significant findings achieved from the research work. Firstly, by using misalignment technique the various deflection of the input-POF toward fixed output fibres produce a wide range of splitting ratios of 0% to 100%. The other finding is, the device achieves the tunable splitting ratio with superior resolution of 0.5 μm with 0.1% power variation by deflect light at 5-μm step-movement across the fibre ends of two receiving output-POFs. In addition to the tunability, the proposed device exhibits a very low loss due to the reshaping of the POF along the mold-insert. 2019 Thesis https://ir.uitm.edu.my/id/eprint/82323/ https://ir.uitm.edu.my/id/eprint/82323/1/82323.pdf text en public phd doctoral Universiti Teknologi MARA (UiTM) Faculty of Applied Science Abd-Rahman, Mohd Kamil
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Abd-Rahman, Mohd Kamil
topic	Optics Light Optics Light
spellingShingle	Optics Light Optics Light Mohamed Kassim, Nor Syafiqah Tunable highly multimode polymer optical fibre power splitter / Nor Syafiqah Mohamed Kassim
description	Optical power splitter based-on polymer optical fibre (POF) is a crucial component in an optical short distance application that requires optical power splitting. The evolution of optical applications provides a large market for the optical power splitter; hence has created demand for variable optical power splitter. The fixed power splitter device has been dominated the highly multimode waveguide area where it cannot be adjusted to amend once it had been fabricated. To the best of my knowledge, only two research works have been reported on tunable splitter device that employs POF. From the literatures, the tunable POF splitter device inherits slightly different splitting ratios, high loss, low controllable resolution and small variable range. The tunable splitter was developed based on angular misalignment technique within a hollow waveguide Y-junction, so predetermined power is allowed to split out asymmetrically to two output ports. The tunable power splitter was demonstrated based on the predefined end shape of POF and also compared to a standard design. The reshaping of fibre end from circular to rectangular cross section greatly reduces the interstitial space between POFs and mold-insert’s waveguide; hence reduce major loss. Two designs of optical power splitter of dynamic power tuning capability with low excess loss and high tuning resolution are presented. The splitters utilized Y-junction waveguide design and one without a junction. The splitter with no junction employing circular to rectangular POF converters achieved a lower excess loss of 0.7 dB for a 50:50 power-splitting compared to Y-junction splitter employed circular POFs achieved an excess loss of 1.68 dB. Non-sequential ray-tracing simulation and mathematical expression of both the splitter designs are confirmed by theoretical investigation as well. The tunable splitter device was tested as vibration detection and surface profiler. There are three significant findings achieved from the research work. Firstly, by using misalignment technique the various deflection of the input-POF toward fixed output fibres produce a wide range of splitting ratios of 0% to 100%. The other finding is, the device achieves the tunable splitting ratio with superior resolution of 0.5 μm with 0.1% power variation by deflect light at 5-μm step-movement across the fibre ends of two receiving output-POFs. In addition to the tunability, the proposed device exhibits a very low loss due to the reshaping of the POF along the mold-insert.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mohamed Kassim, Nor Syafiqah
author_facet	Mohamed Kassim, Nor Syafiqah
author_sort	Mohamed Kassim, Nor Syafiqah
title	Tunable highly multimode polymer optical fibre power splitter / Nor Syafiqah Mohamed Kassim
title_short	Tunable highly multimode polymer optical fibre power splitter / Nor Syafiqah Mohamed Kassim
title_full	Tunable highly multimode polymer optical fibre power splitter / Nor Syafiqah Mohamed Kassim
title_fullStr	Tunable highly multimode polymer optical fibre power splitter / Nor Syafiqah Mohamed Kassim
title_full_unstemmed	Tunable highly multimode polymer optical fibre power splitter / Nor Syafiqah Mohamed Kassim
title_sort	tunable highly multimode polymer optical fibre power splitter / nor syafiqah mohamed kassim
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Applied Science
publishDate	2019
url	https://ir.uitm.edu.my/id/eprint/82323/1/82323.pdf
_version_	1804889709244055552

Tunable highly multimode polymer optical fibre power splitter / Nor Syafiqah Mohamed Kassim

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