Development of an optical pulsing by using pockels effect

Laser produced from active medium is normally in continuous mode. The beam can be modulated by inserting switching mechanism. An electro-optic mechanism is one of the techniques used to alter the operation of laser beam from continuous into pulse mode. Hence, the objective of this project is to deve...

Full description

Saved in:

Bibliographic Details
Main Author:	Thian, Lee Eng
Format:	Thesis
Language:	English
Published:	2005
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/4194/1/ThianLeeEngMFS2005.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.4194
record_format	uketd_dc
spelling	my-utm-ep.41942018-01-16T03:41:55Z Development of an optical pulsing by using pockels effect 2005-08 Thian, Lee Eng QC Physics Laser produced from active medium is normally in continuous mode. The beam can be modulated by inserting switching mechanism. An electro-optic mechanism is one of the techniques used to alter the operation of laser beam from continuous into pulse mode. Hence, the objective of this project is to develop an optical switch system by using Pockels effect. Helium-Neon (He-Ne) laser was used as continuous light source in the project. Calcite and quartz crystals were employed as natural birefringent materials. While a synthetic birefringent material, lithium niobate was used as a Pockels cell. The lithium niobate crystal can become birefringent only through the application of electric field. Therefore, several pulse generators were developed and used to trigger an electrooptic driver to electrify the lithium niobate crystal. A Pockels cell house was designed and fabricated by using perspex. The Pockels cell house was completed with electrodes. The performance of the fabricated Pockels cell was compared to the commercial Pockels cell. Both of the Pockels cells exhibited similar characteristic, whereby the linear polarization state of laser light was turned into circular state when it entered the electrified Pockels cells with a : b ratio of 1.0 : 1.0 (2 kV and 3 kV voltage applied) and 1.1 : 1.0 (4 kV voltage applied). This converts the continuous He-Ne beam into pulse mode. The generation of the laser pulse can be operated either in a single or repetitive mode. It depends on the frequency of the pulse generator. The amplitude of the produced laser pulse was increased by increasing the voltage supplied to electrify the lithium niobate crystal. The amplitude of the produced laser pulse by using transverse Pockels cell was 500 mV, 700 mV and 1000 mV at 2 kV, 3 kV and 4 kV applied voltage. While the result obtained by using commercial Pockels cell was 700 mV, 900mV and 1200 mV. 2005-08 Thesis http://eprints.utm.my/id/eprint/4194/ http://eprints.utm.my/id/eprint/4194/1/ThianLeeEngMFS2005.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Thian, Lee Eng Development of an optical pulsing by using pockels effect
description	Laser produced from active medium is normally in continuous mode. The beam can be modulated by inserting switching mechanism. An electro-optic mechanism is one of the techniques used to alter the operation of laser beam from continuous into pulse mode. Hence, the objective of this project is to develop an optical switch system by using Pockels effect. Helium-Neon (He-Ne) laser was used as continuous light source in the project. Calcite and quartz crystals were employed as natural birefringent materials. While a synthetic birefringent material, lithium niobate was used as a Pockels cell. The lithium niobate crystal can become birefringent only through the application of electric field. Therefore, several pulse generators were developed and used to trigger an electrooptic driver to electrify the lithium niobate crystal. A Pockels cell house was designed and fabricated by using perspex. The Pockels cell house was completed with electrodes. The performance of the fabricated Pockels cell was compared to the commercial Pockels cell. Both of the Pockels cells exhibited similar characteristic, whereby the linear polarization state of laser light was turned into circular state when it entered the electrified Pockels cells with a : b ratio of 1.0 : 1.0 (2 kV and 3 kV voltage applied) and 1.1 : 1.0 (4 kV voltage applied). This converts the continuous He-Ne beam into pulse mode. The generation of the laser pulse can be operated either in a single or repetitive mode. It depends on the frequency of the pulse generator. The amplitude of the produced laser pulse was increased by increasing the voltage supplied to electrify the lithium niobate crystal. The amplitude of the produced laser pulse by using transverse Pockels cell was 500 mV, 700 mV and 1000 mV at 2 kV, 3 kV and 4 kV applied voltage. While the result obtained by using commercial Pockels cell was 700 mV, 900mV and 1200 mV.
format	Thesis
qualification_level	Master's degree
author	Thian, Lee Eng
author_facet	Thian, Lee Eng
author_sort	Thian, Lee Eng
title	Development of an optical pulsing by using pockels effect
title_short	Development of an optical pulsing by using pockels effect
title_full	Development of an optical pulsing by using pockels effect
title_fullStr	Development of an optical pulsing by using pockels effect
title_full_unstemmed	Development of an optical pulsing by using pockels effect
title_sort	development of an optical pulsing by using pockels effect
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2005
url	http://eprints.utm.my/id/eprint/4194/1/ThianLeeEngMFS2005.pdf
_version_	1747814501531516928

Development of an optical pulsing by using pockels effect

Similar Items