Citation

Md Rodzi, Noor Shafikah (2023) Reconfigurable spectrum of in-fibre structures using confined heating and strain. PhD thesis, Multimedia University.

Full text not available from this repository.

Abstract

Optical fibre-based devices have played important roles as the key to technological advancement for numerous science and engineering fields ranging from telecommunication, medical, and manufacturing industries. These optical fiberbased devices can be formed through special optical structures and configurations of optical fibers, such as Fiber Bragg Grating (FBG), Long Period Grating (LPG), and in-line Mach-Zehnder Interferometer (MZI). The unique features of these optical fibre devices in manipulating light warrants them to attain promising potential in many advanced optical applications. For example, in optical communication systems, these structures generally were used as optical spectral filters such as tunable bandpass filters, variable optical attenuators and polarization controllers. However, the existing devices have a limitation in their tuning capability, which are restricted to merely shifting their central operational wavelengths. Apart from wavelength tuning, in order to offer versatile features for optical networks and sensing applications, it is important to fabricate dynamic filters that have the capability of reconfigurable spectral responses to be adaptable to the complex varying signal conditions and system operating environments. The new dynamic filters are also desirable to be compact, and should require cost-effective fabrication and operation implementation. In order to realize these desires, this research aims to investigate effective techniques in producing a novel in-fibre structure with reconfigurable spectral response. The approach of this research is to construct a series of specially designed in-fibre structures and applying controlled strain or temperature. The properties of various designs of the in-fibre structure, such as periodic and aperiodic serial formations, will be fully explored. The structures will then be investigated with confined heating and confined mechanical strain as the means to reconfigure its manufactured spectral profiles. The results reveal that by controlling the position of the tungsten and the magnitude of the heat applied to the taper fiber, the transmission spectrum can be altered with varying intensity with a sensitivity of 0.0216 dB/℃, while the operational wavelength remains constant. Moreover, by applying strain to a small area of a microbottle structure can lead to intensity-tunable spectral responses with a sensitivity of 0.3791 dB/

Item Type:	Thesis (PhD)
Additional Information:	Call No.: TA418.9.C6 N66 2023
Uncontrolled Keywords:	Fibrous composites
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	01 Oct 2025 03:41
Last Modified:	01 Oct 2025 03:41
URII:	http://shdl.mmu.edu.my/id/eprint/14647

Downloads

Edit (login required)