Erbium doped fiber lasers utilizing gadolinium oxide, neodymium oxide and samarium oxide as passive saturable absorbers

Erbium doped fiber laser (EDFL) plays an important role in generating laser in the 1.5-micron region which contributes to many applications such as material processing, optical communication and biomedical. The main goal of this research is to improve the passive technique in generating mode-locked...

Full description

Saved in:

Bibliographic Details
Main Author:	Mat Yusoff, Rabi’atul ‘Adawiyah
Format:	Thesis
Language:	English
Published:	2022
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/102407/1/Rabi%20atul%20AdawiyahMatYusoffPFS2022.pdf.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.102407
record_format	uketd_dc
spelling	my-utm-ep.1024072023-08-29T06:18:37Z Erbium doped fiber lasers utilizing gadolinium oxide, neodymium oxide and samarium oxide as passive saturable absorbers 2022 Mat Yusoff, Rabi’atul ‘Adawiyah QC Physics Erbium doped fiber laser (EDFL) plays an important role in generating laser in the 1.5-micron region which contributes to many applications such as material processing, optical communication and biomedical. The main goal of this research is to improve the passive technique in generating mode-locked and Q-switched pulsed fiber laser. The passive technique uses a saturable absorber (SA) as a passive optical loss modulator for the creation of pulses inside the laser cavity. Three rare earth oxides (REO) are chosen to be utilised as the saturable absorbers that are Gadolinium Oxide (Gd2O3), Neodymium Oxide (Nd2O3) and Samarium Oxide (Sm2O3). The REO-based SA was fabricated in the form of thin film by mixing it into polyvinyl alcohol (PVA) aqueous solution to produce a free-standing polymer composite SA film. The characterisations of SA films include physical and optical properties. The physical properties were characterised using field emission electron microscopy (FESEM) and energy dispersive X-ray spectroscopy (EDX). The characterisations of optical properties include linear and nonlinear absorptions. The Q-switched pulses were generated by inserting the SA film into the laser cavity. The addition of 100 m single mode fiber (SMF) with group dispersion delay (GVD) of -21.7 ps2/km into the laser cavity increased its nonlinearity to balance the total cavity dispersion, consequently, promoted the mode-locking action. The performance of pulsed lasers were analysed and discussed in term of the pulsed laser parameters. The mode-locked pulsed laser with Sm2O3 SA had successfully generated stable pulses with the minimum pulse width of 3.4 ps. Gd2O3 and Nd2O3 SA films generated the mode-locked laser pulses with pulse widths of 3.82 ps and 4.62 ps respectively. The Q-switched laser performances acquired using the three SA films also show desirable laser outputs. Based on the performances of Q-switched and mode-locked pulsed lasers, this research was successfully done with less tedious SA preparation and simple laser cavity setup, thus it have a good potential for photonics applications. 2022 Thesis http://eprints.utm.my/id/eprint/102407/ http://eprints.utm.my/id/eprint/102407/1/Rabi%20atul%20AdawiyahMatYusoffPFS2022.pdf.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:149199 phd doctoral Universiti Teknologi Malaysia Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Mat Yusoff, Rabi’atul ‘Adawiyah Erbium doped fiber lasers utilizing gadolinium oxide, neodymium oxide and samarium oxide as passive saturable absorbers
description	Erbium doped fiber laser (EDFL) plays an important role in generating laser in the 1.5-micron region which contributes to many applications such as material processing, optical communication and biomedical. The main goal of this research is to improve the passive technique in generating mode-locked and Q-switched pulsed fiber laser. The passive technique uses a saturable absorber (SA) as a passive optical loss modulator for the creation of pulses inside the laser cavity. Three rare earth oxides (REO) are chosen to be utilised as the saturable absorbers that are Gadolinium Oxide (Gd2O3), Neodymium Oxide (Nd2O3) and Samarium Oxide (Sm2O3). The REO-based SA was fabricated in the form of thin film by mixing it into polyvinyl alcohol (PVA) aqueous solution to produce a free-standing polymer composite SA film. The characterisations of SA films include physical and optical properties. The physical properties were characterised using field emission electron microscopy (FESEM) and energy dispersive X-ray spectroscopy (EDX). The characterisations of optical properties include linear and nonlinear absorptions. The Q-switched pulses were generated by inserting the SA film into the laser cavity. The addition of 100 m single mode fiber (SMF) with group dispersion delay (GVD) of -21.7 ps2/km into the laser cavity increased its nonlinearity to balance the total cavity dispersion, consequently, promoted the mode-locking action. The performance of pulsed lasers were analysed and discussed in term of the pulsed laser parameters. The mode-locked pulsed laser with Sm2O3 SA had successfully generated stable pulses with the minimum pulse width of 3.4 ps. Gd2O3 and Nd2O3 SA films generated the mode-locked laser pulses with pulse widths of 3.82 ps and 4.62 ps respectively. The Q-switched laser performances acquired using the three SA films also show desirable laser outputs. Based on the performances of Q-switched and mode-locked pulsed lasers, this research was successfully done with less tedious SA preparation and simple laser cavity setup, thus it have a good potential for photonics applications.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mat Yusoff, Rabi’atul ‘Adawiyah
author_facet	Mat Yusoff, Rabi’atul ‘Adawiyah
author_sort	Mat Yusoff, Rabi’atul ‘Adawiyah
title	Erbium doped fiber lasers utilizing gadolinium oxide, neodymium oxide and samarium oxide as passive saturable absorbers
title_short	Erbium doped fiber lasers utilizing gadolinium oxide, neodymium oxide and samarium oxide as passive saturable absorbers
title_full	Erbium doped fiber lasers utilizing gadolinium oxide, neodymium oxide and samarium oxide as passive saturable absorbers
title_fullStr	Erbium doped fiber lasers utilizing gadolinium oxide, neodymium oxide and samarium oxide as passive saturable absorbers
title_full_unstemmed	Erbium doped fiber lasers utilizing gadolinium oxide, neodymium oxide and samarium oxide as passive saturable absorbers
title_sort	erbium doped fiber lasers utilizing gadolinium oxide, neodymium oxide and samarium oxide as passive saturable absorbers
granting_institution	Universiti Teknologi Malaysia
granting_department	Faculty of Science
publishDate	2022
url	http://eprints.utm.my/id/eprint/102407/1/Rabi%20atul%20AdawiyahMatYusoffPFS2022.pdf.pdf
_version_	1776100915860733952

Erbium doped fiber lasers utilizing gadolinium oxide, neodymium oxide and samarium oxide as passive saturable absorbers

Similar Items