Characterization of thulium-doped fiber as active gain medium at 2000 nanometer wavelength region

Driven by huge demands and needs, the communication industry has tremendously grown in all over the world. With the development of low loss optical fiber as the main optical communication medium, high power tunable laser and other related auxiliary components are developed to practically opt as an a...

全面介紹

Saved in:
書目詳細資料
主要作者: Mohd. Sharif, Nurhanis
格式: Thesis
語言:English
出版: 2017
主題:
在線閱讀:http://eprints.utm.my/id/eprint/91954/1/NurhanisMohdSharifMRAZAK2017.pdf
http://eprints.utm.my/id/eprint/91954/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:131670
標簽: 添加標簽
沒有標簽, 成為第一個標記此記錄!
id my.utm.91954
record_format eprints
spelling my.utm.919542021-08-09T08:46:26Z http://eprints.utm.my/id/eprint/91954/ Characterization of thulium-doped fiber as active gain medium at 2000 nanometer wavelength region Mohd. Sharif, Nurhanis T58.5-58.64 Information technology Driven by huge demands and needs, the communication industry has tremendously grown in all over the world. With the development of low loss optical fiber as the main optical communication medium, high power tunable laser and other related auxiliary components are developed to practically opt as an alternative to the electrical communication system. In conjunction with the rapid growth of data traffic and high bandwidth demands, 2 µm wavelength region has been looked out for. In this study, the generation of thulium-doped fiber laser is thoroughly investigated especially in generating pulsed laser. Passively Q-switched thulium-doped fiber laser (TDFL) is successfully experimented by using graphene-based saturable absorber (SA) as a Q-switcher in modulating the intra-cavity loss experienced by the fiber laser system. In the generation of Q-switched TDFL, the laser system has been set up in two configurations; ring cavity and linear cavity. The comparison of the laser performance in terms of frequency, output power, pulse width, and pulse energy differ significantly to each laser cavity. Moreover, the effects of nonlinearities also contribute to the generation of the Q-switched TDFL. These effects can be seen in the wider spectrum of the Q-switched TDFL as being compared to the spectrum of the continuous wave (CW) laser. In this study, four set ups of Q-switched TDFL in ring cavity using four different SAs have been investigated whereas a set of Q-switched TDFL experimented in a linear cavity. Besides that, this study also focuses on the designations of thulium-doped fiber amplifier that can be applied for future generation in optical communication. As aforementioned, 2 µm wavelength region has been the interest of the optical communication society at present. In this study, the thulium-doped fiber amplifier (TDFA) is demonstrated through simulation by OptiSystem v. 13. The basic single stage TDFA is successfully demonstrated and this design is made comparable to the dual-stages TDFA which utilized the pump distribution technique. In the dual-stages with distributed pumping configuration, the pump power is distributed into two stages. Fifty percent of the pump power is being used in the first stage while another fifty percent is being used in the second stage. Tri-stages TDFA is also being demonstrated through the OptiSys and it had been made comparable to the dual-stages TDFA where both TDFAs are utilizing the same enhancement technique. It is shown that the dual-stages TDFA has successfully decreased the noise figure of about 2 dB. All TDFAs were investigated in achieving high gain, high output power with low noise figure. 2017 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/91954/1/NurhanisMohdSharifMRAZAK2017.pdf Mohd. Sharif, Nurhanis (2017) Characterization of thulium-doped fiber as active gain medium at 2000 nanometer wavelength region. Masters thesis, Universiti Teknologi Malaysia, Razak Faculty of Technology and Informatics. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:131670
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic T58.5-58.64 Information technology
spellingShingle T58.5-58.64 Information technology
Mohd. Sharif, Nurhanis
Characterization of thulium-doped fiber as active gain medium at 2000 nanometer wavelength region
description Driven by huge demands and needs, the communication industry has tremendously grown in all over the world. With the development of low loss optical fiber as the main optical communication medium, high power tunable laser and other related auxiliary components are developed to practically opt as an alternative to the electrical communication system. In conjunction with the rapid growth of data traffic and high bandwidth demands, 2 µm wavelength region has been looked out for. In this study, the generation of thulium-doped fiber laser is thoroughly investigated especially in generating pulsed laser. Passively Q-switched thulium-doped fiber laser (TDFL) is successfully experimented by using graphene-based saturable absorber (SA) as a Q-switcher in modulating the intra-cavity loss experienced by the fiber laser system. In the generation of Q-switched TDFL, the laser system has been set up in two configurations; ring cavity and linear cavity. The comparison of the laser performance in terms of frequency, output power, pulse width, and pulse energy differ significantly to each laser cavity. Moreover, the effects of nonlinearities also contribute to the generation of the Q-switched TDFL. These effects can be seen in the wider spectrum of the Q-switched TDFL as being compared to the spectrum of the continuous wave (CW) laser. In this study, four set ups of Q-switched TDFL in ring cavity using four different SAs have been investigated whereas a set of Q-switched TDFL experimented in a linear cavity. Besides that, this study also focuses on the designations of thulium-doped fiber amplifier that can be applied for future generation in optical communication. As aforementioned, 2 µm wavelength region has been the interest of the optical communication society at present. In this study, the thulium-doped fiber amplifier (TDFA) is demonstrated through simulation by OptiSystem v. 13. The basic single stage TDFA is successfully demonstrated and this design is made comparable to the dual-stages TDFA which utilized the pump distribution technique. In the dual-stages with distributed pumping configuration, the pump power is distributed into two stages. Fifty percent of the pump power is being used in the first stage while another fifty percent is being used in the second stage. Tri-stages TDFA is also being demonstrated through the OptiSys and it had been made comparable to the dual-stages TDFA where both TDFAs are utilizing the same enhancement technique. It is shown that the dual-stages TDFA has successfully decreased the noise figure of about 2 dB. All TDFAs were investigated in achieving high gain, high output power with low noise figure.
format Thesis
author Mohd. Sharif, Nurhanis
author_facet Mohd. Sharif, Nurhanis
author_sort Mohd. Sharif, Nurhanis
title Characterization of thulium-doped fiber as active gain medium at 2000 nanometer wavelength region
title_short Characterization of thulium-doped fiber as active gain medium at 2000 nanometer wavelength region
title_full Characterization of thulium-doped fiber as active gain medium at 2000 nanometer wavelength region
title_fullStr Characterization of thulium-doped fiber as active gain medium at 2000 nanometer wavelength region
title_full_unstemmed Characterization of thulium-doped fiber as active gain medium at 2000 nanometer wavelength region
title_sort characterization of thulium-doped fiber as active gain medium at 2000 nanometer wavelength region
publishDate 2017
url http://eprints.utm.my/id/eprint/91954/1/NurhanisMohdSharifMRAZAK2017.pdf
http://eprints.utm.my/id/eprint/91954/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:131670
_version_ 1707765878686220288
score 13.209306