Experimental set up for characterization of acousto-optic modulator system

Acousto-optic effect can be used in many useful devices such as modulators, switches, filters, frequency shifters and spectrum analyzers. In this study, the modulating effect was generated by low cost SF6 glass with a lithium niobate transducer. Tunable Helium Neon Laser was used as the main light s...

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Main Author:	Ismail, Norshahida
Format:	Thesis
Language:	English
Published:	2010
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/15925/6/NorshahidaIsmailMFSA2010.pdf
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id	my-utm-ep.15925
record_format	uketd_dc
spelling	my-utm-ep.159252017-09-18T06:37:22Z Experimental set up for characterization of acousto-optic modulator system 2010-01 Ismail, Norshahida QC Physics Acousto-optic effect can be used in many useful devices such as modulators, switches, filters, frequency shifters and spectrum analyzers. In this study, the modulating effect was generated by low cost SF6 glass with a lithium niobate transducer. Tunable Helium Neon Laser was used as the main light source. The function generator was used to generate external input signal and to vary the amplitude of acoustic wave. The modulated output signal was measured and analyzed using laser beam profiler, spectrometer, Si photo detector and power meter. The investigation shows that there was a shift of the horizontal main beam spot position when the driving frequency of the modulator is changed. A shift of beam spot between 4.0 mm to 5.5 mm was observed for a frequency range between 70 MHz to 90MHz. This is accordance with the expected theoretical model of the modulator. Results also show that a modulator can produce output signals, which are of the same type as the input signal. Increasing the amplitude of modulating signal in the range of 119 mV to 196 mV decreases the amplitude of modulated square wave signal from 2.6 V to 0.4 V. There was a decrease in the output power of the zero order diffraction but an increase in the first order diffraction with respect to the increase of the RF driving power. 2010-01 Thesis http://eprints.utm.my/id/eprint/15925/ http://eprints.utm.my/id/eprint/15925/6/NorshahidaIsmailMFSA2010.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 Ismail, Norshahida Experimental set up for characterization of acousto-optic modulator system
description	Acousto-optic effect can be used in many useful devices such as modulators, switches, filters, frequency shifters and spectrum analyzers. In this study, the modulating effect was generated by low cost SF6 glass with a lithium niobate transducer. Tunable Helium Neon Laser was used as the main light source. The function generator was used to generate external input signal and to vary the amplitude of acoustic wave. The modulated output signal was measured and analyzed using laser beam profiler, spectrometer, Si photo detector and power meter. The investigation shows that there was a shift of the horizontal main beam spot position when the driving frequency of the modulator is changed. A shift of beam spot between 4.0 mm to 5.5 mm was observed for a frequency range between 70 MHz to 90MHz. This is accordance with the expected theoretical model of the modulator. Results also show that a modulator can produce output signals, which are of the same type as the input signal. Increasing the amplitude of modulating signal in the range of 119 mV to 196 mV decreases the amplitude of modulated square wave signal from 2.6 V to 0.4 V. There was a decrease in the output power of the zero order diffraction but an increase in the first order diffraction with respect to the increase of the RF driving power.
format	Thesis
qualification_level	Master's degree
author	Ismail, Norshahida
author_facet	Ismail, Norshahida
author_sort	Ismail, Norshahida
title	Experimental set up for characterization of acousto-optic modulator system
title_short	Experimental set up for characterization of acousto-optic modulator system
title_full	Experimental set up for characterization of acousto-optic modulator system
title_fullStr	Experimental set up for characterization of acousto-optic modulator system
title_full_unstemmed	Experimental set up for characterization of acousto-optic modulator system
title_sort	experimental set up for characterization of acousto-optic modulator system
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2010
url	http://eprints.utm.my/id/eprint/15925/6/NorshahidaIsmailMFSA2010.pdf
_version_	1747814998807150592

Experimental set up for characterization of acousto-optic modulator system

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