Staff View: Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique

Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique

Background: Pulsed fiber lasers operating near 1900 nm are becoming emerging laser sources for scientific and industrial applications, because of their unique advantages in terms of eye-safe wavelength, and high absorption in greenhouse gases, liquid water, and most polycarbonate materials. We devel...

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Main Authors:	Harun, Sulaiman Wadi, Shamsudin, H., Ahmad, Harith, Halder, A., Paul, M.C., Pal, M., Bhadra, S.K.
Format:	Article
Published:	Bentham Science Publishers 2016
Subjects:	QC Physics TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.um.edu.my/17936/ http://www.eurekaselect.com/137162
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spelling	my.um.eprints.179362018-10-09T03:29:02Z http://eprints.um.edu.my/17936/ Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique Harun, Sulaiman Wadi Shamsudin, H. Ahmad, Harith Halder, A. Paul, M.C. Pal, M. Bhadra, S.K. QC Physics TA Engineering (General). Civil engineering (General) Background: Pulsed fiber lasers operating near 1900 nm are becoming emerging laser sources for scientific and industrial applications, because of their unique advantages in terms of eye-safe wavelength, and high absorption in greenhouse gases, liquid water, and most polycarbonate materials. We develop new nanoengineering double-clad Thulium-Ytterbium co-doped fiber (TYDF) to provide an efficient lasing at 1950 nm region based on energy transfer from Ytterbium to Thulium ion. The performance of the TYDF is investigated for both continuous wave (CW) and pulse laser operations. Methods: The TYDF is fabricated using a Modified Chemical Vapor Deposition (MCVD) process in conjunction with solution doping technique. The lasing characteristic of the TYDF laser (TYDFL) is investigated for both linear and ring configurations. The pulse generations are demonstrated using various passive saturable absorbers (SAs) such multiwalled carbon nanotubes (MWCNTs) and graphene oxide. Results: With a linear configuration, the TYDFL operates at center wavelength of 1936.4 nm, 1958.6 nm and 1967.5 nm at gain medium lengths of 5 m, 10 m and 15 m, respectively. The proposed laser produces the highest efficiency of 9 .9 % at 10 m long TYDF and the lowest threshold pump power of 400 mW at a longer TYDF length of 15 m. The Q-switched laser operates at 1960 nm region is achieved by exploiting a MWCNTs embedded in polymer composite film as a SA. The proposed TYDFL generates a stable pulse train with repetition rates and pulse widths ranging from 18.9 to 35.1 kHz and 7.94 to 1.52 μs, respectively by varying the multimode 980 nm pump power from 440 mW to 528 mW. The maximum pulse energy of 11.2 nJ is obtained at the pump power of 512 mW. A higher performance Q switching is expected to be achieved with the optimization of the laser cavity and SA. A mode-locked TYDFL is also demonstrated using a graphene oxide (GO) based SA. The laser operates at 1942.0 nm with a threshold pump power as low as 1.8 W, a repetition rate of 22.32 MHz and calculated pulse duration of 1.1 ns. Conclusion: The developed TYDF is capable for use in developing both CW and pulsed fiber laser in conjunction with cladding pumping technique. Bentham Science Publishers 2016 Article PeerReviewed Harun, Sulaiman Wadi and Shamsudin, H. and Ahmad, Harith and Halder, A. and Paul, M.C. and Pal, M. and Bhadra, S.K. (2016) Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique. Current Nanoscience, 12 (3). pp. 299-308. ISSN 1573-4137 http://www.eurekaselect.com/137162
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	QC Physics TA Engineering (General). Civil engineering (General)
spellingShingle	QC Physics TA Engineering (General). Civil engineering (General) Harun, Sulaiman Wadi Shamsudin, H. Ahmad, Harith Halder, A. Paul, M.C. Pal, M. Bhadra, S.K. Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique
description	Background: Pulsed fiber lasers operating near 1900 nm are becoming emerging laser sources for scientific and industrial applications, because of their unique advantages in terms of eye-safe wavelength, and high absorption in greenhouse gases, liquid water, and most polycarbonate materials. We develop new nanoengineering double-clad Thulium-Ytterbium co-doped fiber (TYDF) to provide an efficient lasing at 1950 nm region based on energy transfer from Ytterbium to Thulium ion. The performance of the TYDF is investigated for both continuous wave (CW) and pulse laser operations. Methods: The TYDF is fabricated using a Modified Chemical Vapor Deposition (MCVD) process in conjunction with solution doping technique. The lasing characteristic of the TYDF laser (TYDFL) is investigated for both linear and ring configurations. The pulse generations are demonstrated using various passive saturable absorbers (SAs) such multiwalled carbon nanotubes (MWCNTs) and graphene oxide. Results: With a linear configuration, the TYDFL operates at center wavelength of 1936.4 nm, 1958.6 nm and 1967.5 nm at gain medium lengths of 5 m, 10 m and 15 m, respectively. The proposed laser produces the highest efficiency of 9 .9 % at 10 m long TYDF and the lowest threshold pump power of 400 mW at a longer TYDF length of 15 m. The Q-switched laser operates at 1960 nm region is achieved by exploiting a MWCNTs embedded in polymer composite film as a SA. The proposed TYDFL generates a stable pulse train with repetition rates and pulse widths ranging from 18.9 to 35.1 kHz and 7.94 to 1.52 μs, respectively by varying the multimode 980 nm pump power from 440 mW to 528 mW. The maximum pulse energy of 11.2 nJ is obtained at the pump power of 512 mW. A higher performance Q switching is expected to be achieved with the optimization of the laser cavity and SA. A mode-locked TYDFL is also demonstrated using a graphene oxide (GO) based SA. The laser operates at 1942.0 nm with a threshold pump power as low as 1.8 W, a repetition rate of 22.32 MHz and calculated pulse duration of 1.1 ns. Conclusion: The developed TYDF is capable for use in developing both CW and pulsed fiber laser in conjunction with cladding pumping technique.
format	Article
author	Harun, Sulaiman Wadi Shamsudin, H. Ahmad, Harith Halder, A. Paul, M.C. Pal, M. Bhadra, S.K.
author_facet	Harun, Sulaiman Wadi Shamsudin, H. Ahmad, Harith Halder, A. Paul, M.C. Pal, M. Bhadra, S.K.
author_sort	Harun, Sulaiman Wadi
title	Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique
title_short	Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique
title_full	Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique
title_fullStr	Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique
title_full_unstemmed	Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique
title_sort	development of cw and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique
publisher	Bentham Science Publishers
publishDate	2016
url	http://eprints.um.edu.my/17936/ http://www.eurekaselect.com/137162
_version_	1643690563057221632
score	13.211869

Development of CW and pulsed thulium ytterbium co-doped fiber lasers using nano-engineered yttria-alimina-silica based gain medium in conjunction with cladding pumping technique

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