Vinyl-silica-titania material derived through sol-gel for optical waveguide device
Also available in printed version : TA1800 A46 2013 raf
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| Format: | Doctoral thesis |
| Language: | English |
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Universiti Teknologi Malaysia
2025
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| Online Access: | https://utmik.utm.my/handle/123456789/114307 |
| Abstract | Abstract here |
| _version_ | 1854975131142586368 |
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| author | Ahmad Sharmi Abdullah |
| author2 | Mohd. Haniff Ibrahim, supervisor |
| author_facet | Mohd. Haniff Ibrahim, supervisor Ahmad Sharmi Abdullah |
| author_sort | Ahmad Sharmi Abdullah |
| description | Also available in printed version : TA1800 A46 2013 raf |
| format | Doctoral thesis |
| id | utm-123456789-114307 |
| institution | Universiti Teknologi Malaysia |
| language | English |
| publishDate | 2025 |
| publisher | Universiti Teknologi Malaysia |
| record_format | dspace |
| record_pdf | Abstract |
| spelling | utm-123456789-1143072025-04-18T18:28:10Z Vinyl-silica-titania material derived through sol-gel for optical waveguide device Ahmad Sharmi Abdullah Mohd. Haniff Ibrahim, supervisor Fiber optics Optical wave guides Also available in printed version : TA1800 A46 2013 raf A fully optical networking system is envisioned as the answer to the constantly expanding telecommunication traffic demands. The system is achieved through the Wavelength Division Multiplexing (WDM) technology, which provides high speed and high capacity network. This technology however demands cost effective and high performance optical devices. Alternative optical materials that could potentially meet the requirements are investigated. Based on the mentioned objective, this thesis proposes new photosensitive organic-inorganic material based on vinyl-silica-titania combination for the optical waveguide device applications. The material is derived through sol-gel technique, which offers various attractive advantages using Vinyl-Triethoxysilane (VTES), Tetraethoxysilane (TEOS) and Titanium «-butoxide (TTBU) precursors or later known as VTT material. VTT material has been evaluated for its reliability and applicability in optical device applications by means of the following methods: characterization of physical, optical and thermal characteristics of VTT materials; design, fabrication and characterization of channel optical waveguides; design and evaluation of thermo-optical switch based on the Directional Coupler (DC) structure. VTT film surface of about 0.724 nm root mean square (rms) roughness is obtained. Besides, VTT material is characterized to have a suitable refractive index of 1.4859 at the wavelength of 1550 nm. Channel VTT waveguide for single mode operation is successfully designed. The developed channel VTT waveguides demonstrate the propagation loss of 1.6 and 6.9 dB/cm at 1310 and 1550 nm wavelengths respectively. The relatively large propagation loss at the 1550 nm wavelength is attributed to the intrinsic absorption of the VTT material and the trapezoidal geometry of waveguide cross section, which is expected to allow multimode operation. The 2*2 DC based VTT thermo-optical switch is successfully designed. Switching functionality is attainable through Thermo-Optics (TO) effect of VTT material and heating mechanism rigorous design. Insertion loss of about 0.2 dB and crosstalk of about -42 dB are obtained. Switching operation is observed to be achievable with thermal power of as low as 35 mW. VTT material has been proven to be reliable and applicable for optical telecommunication device applications atiff UTM 199 p. Thesis (Ph.D (Kejuruteraan Elektrik)) - Universiti Teknologi Malaysia, 2013 2025-04-18T07:31:20Z 2025-04-18T07:31:20Z 2013-11 Doctoral thesis https://utmik.utm.my/handle/123456789/114307 valet-20150708-124332 vital:77684 ENG Closed Access UTM Complete Completion Unpublished application/pdf Universiti Teknologi Malaysia |
| spellingShingle | Fiber optics Optical wave guides Ahmad Sharmi Abdullah Vinyl-silica-titania material derived through sol-gel for optical waveguide device |
| thesis_level | PhD |
| title | Vinyl-silica-titania material derived through sol-gel for optical waveguide device |
| title_full | Vinyl-silica-titania material derived through sol-gel for optical waveguide device |
| title_fullStr | Vinyl-silica-titania material derived through sol-gel for optical waveguide device |
| title_full_unstemmed | Vinyl-silica-titania material derived through sol-gel for optical waveguide device |
| title_short | Vinyl-silica-titania material derived through sol-gel for optical waveguide device |
| title_sort | vinyl silica titania material derived through sol gel for optical waveguide device |
| topic | Fiber optics Optical wave guides |
| url | https://utmik.utm.my/handle/123456789/114307 |
| work_keys_str_mv | AT ahmadsharmiabdullah vinylsilicatitaniamaterialderivedthroughsolgelforopticalwaveguidedevice |