Self-Mixing Diode Laser Interferometry

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dc.contributor.advisorKünnemeyer, Rainer
dc.contributor.authorShrestha, Pawan Kumaren_NZ
dc.date.accessioned2011-11-20T23:37:58Z
dc.date.available2011-11-20T23:37:58Z
dc.date.issued2010en_NZ
dc.description.abstractSelf-mixing interferometry in a laser diode is a very powerful tool in measurement science. The Self-mixing interferometer is a very robust and low cost interferometer with extreme simplicity in alignment and setup. In this thesis, a self-mixing interferometer is analysed and developed. The measurements of the self-mixing interferometer are verified using a Michelson interferometer. It is then followed by the signal processing of the detected signal. Three different methods are developed to retrieve the movement of the target. Results obtained by applying these methods to different experimental data sets are presented. In the later part of the thesis, a phase locked self-mixing interferometer is developed. This slightly modified interferometer follows the target movement. As a result no additional circuitry or signal processing is necessary for the recovery of the target movement. Phase locked interferometer developed in this thesis was able to measure down to 1 nm of vibration. It is then followed by a novel method to detect cracks in eggshells using the phase locked vibrometer. The proposed method is tested and proved to be capable of differentiating between the intact and cracked eggs.en_NZ
dc.format.mimetypeapplication/pdf
dc.identifier.citationShrestha, P. K. (2010). Self-Mixing Diode Laser Interferometry (Thesis, Master of Engineering (ME)). The University of Waikato, Hamilton, New Zealand. Retrieved from https://hdl.handle.net/10289/5910en
dc.identifier.urihttps://hdl.handle.net/10289/5910
dc.language.isoen
dc.publisherThe University of Waikatoen_NZ
dc.rightsAll items in Research Commons are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectSelf-mixingen_NZ
dc.subjectinterferometryen_NZ
dc.subjectlaser diodeen_NZ
dc.subjectphase lockeden_NZ
dc.subjectvibrometeren_NZ
dc.subjectintact and cracked eggs.en_NZ
dc.titleSelf-Mixing Diode Laser Interferometryen_NZ
dc.typeThesisen_NZ
pubs.elements-id55784
pubs.place-of-publicationHamilton, New Zealanden_NZ
thesis.degree.disciplineEngineeringen_NZ
thesis.degree.grantorUniversity of Waikatoen_NZ
thesis.degree.levelMasters
thesis.degree.nameMaster of Engineering (ME)en_NZ
uow.date.accession2010-02-08en_NZ
uow.identifier.adthttp://adt.waikato.ac.nz/uploads/adt-uow20100208.135206
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