Study of S-band optical amplifiers and its applications / Mohd Zamani Zulkifli
Currently, existing networks which utilizes Dense Wavelength Division Multiplexing (DWDM) have come to its limitation, with the increase of data traffic extending the operational bandwidth from the C- to the L-band. Although the L-band can sustain current demands, there is a pressing need to expl...
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| Format: | Thesis |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://studentsrepo.um.edu.my/3819/1/1._Title_page%2C_abstract%2C_content.pdf http://studentsrepo.um.edu.my/3819/2/2._Chapter_1_%E2%80%93_6.pdf http://studentsrepo.um.edu.my/3819/3/4._Appendices.pdf http://pendeta.um.edu.my/client/default/search/results?qu=Study+of+S-band+optical+amplifiers+and+its+applications&te= http://studentsrepo.um.edu.my/3819/ |
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| Institution: | Universiti Malaya |
| Summary: | Currently, existing networks which utilizes Dense Wavelength Division Multiplexing
(DWDM) have come to its limitation, with the increase of data traffic extending the
operational bandwidth from the C- to the L-band. Although the L-band can sustain
current demands, there is a pressing need to explore the S-band region for future needs.
One of the important components for operation in the S-band region is the S-band
optical amplifier, which requires in-depth investigation and is the scope and objective of
this thesis. The work will undertake a nearly comprehensive evaluation of the different
types of optical amplifiers such as Erbium Doped Fibers Amplifiers (EDFAs),
Depressed-Cladding Erbium-Doped Fibers Amplifiers (DC-EDFAs), Semiconductor
Optical Amplifier (SOAs) and Raman Amplifier (RAs). The methodology of this work
is to investigate these amplifiers from the aspect of the gain and noise figure at different
input signal wavelengths and powers. Further to this, the optical amplifier is configured
into a fiber laser and various parameters such as the tuning range, output power and the
Side Mode Supression Ratio (SMSR) will be investigated. Various methods are used to
tune the wavelength of the fibre lasers, including the Arrayed Waveguide Gratings
(AWGs) and Tunable Bandpass Filters (TBFs) as well as Tunable Fibre Bragg Gratings
(TBFGs) for different gain media. Significantly important results were obtained from
these investigations, including the generation of an SOA based fiber laser with an ultrawide
tuning range of more than 120 nm covering the S-, C- and L- bands.
This thesis also presents another application of the S-band amplifier, which is
the multi-wavelength Brillouin fiber laser operating in the S-band region. This
application is important for the development cost-effective transmission sources for the
DWDM systems. The multi-wavelength fiber laser uses the Brillouin effect, which is a non-linear optical effect, together with the EDFA, DC-EDFA, SOA and RA to generate
a multi-wavelength output in the S-band region. The developed multi-wavelength
Brillouin fiber laser has a number of substantial performance improvements over
similar designs, including the number of the Stokes lines generated, flat output peak
power and also channel spacing.
The studies undertaken and the results obtained in this work can provide important
inputs into the design of S-band optical amplifiers for application in future S-band
networks. Furthermore, the results obtained in this work are instrumental to the
development of tunable S-band fiber laser sources and also multi-wavelength sources
for the possibility of usage in DWDM systems. |
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