GLASSES AND GLASS-CERAMICS TRANSPARENT IN THE INFRARED RANGE TO BE USED AS OPTICAL SENSORS

Persistent Link:
http://hdl.handle.net/10150/193808
Title:
GLASSES AND GLASS-CERAMICS TRANSPARENT IN THE INFRARED RANGE TO BE USED AS OPTICAL SENSORS
Author:
Lepine, Eric
Issue Date:
2010
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The present work deals with the study of infrared transparent glasses and their applications for sensor use. Their behavior under LASER irradiation, as well as the possibility to modify the surface, and the exploration of new glass compositions has been studied. Four tasks were completed with the main goal of designing infrared optical sensors. In a first task, the deposition of various thin films at the surface of a chalcogenide glass has been investigated in order to produce nano porous surfaces. Films were produced by vapor deposition and cathodic sputtering. Vapor deposition did not produce homogeneous films while cathodic sputtering lead to layers of controlled thickness which could produce a porous surface by selective etching. In a second task, the possibility of writing waveguide with femtosecond laser was investigated in Ge-Ga-S/Se-CsCl glasses. It was shown that high power leads to negative index changes unfit for light guiding, while low power lead to small positive index change. It was also shown that the filamentation method lead to homogeneous waveguide with large positive index changes. In a third task, photo-induced phenomena were investigated, especially photo-induced fluidity, on the binary system Ge-Se. The study initiated with the work on relaxation of fiber optics of composition Ge-Se₃ Ge-Se₄ and Ge-Se₉ and their response to shear stress under LASER irradiation in the Urbach region. This leads to the determination of their viscosity under irradiation as a function of the power and wavelength used. This preliminary study enabled using this technique for optical tapering of chalcogenide fibers. A tapered fiber was obtained with good control over the diameter, and length of the sensor and improved sensing sensitivity was demonstrated. Finally, exploration of new glassy systems containing no chalcogenide elements but only heavy halide compounds (PbI₂, PbBr₂, CsI…) were investigated. These amorphous ionic compounds lead to infrared window transmitting from 500 nm up to 26 μm, unfortunately their moisture sensitivity as well as poor mechanical and thermal properties did not make them good candidate for sensor applications.
Type:
text; Electronic Dissertation
Keywords:
Materials Science & Engineering
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Materials Science & Engineering; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Lucas, Pierre

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleGLASSES AND GLASS-CERAMICS TRANSPARENT IN THE INFRARED RANGE TO BE USED AS OPTICAL SENSORSen_US
dc.creatorLepine, Ericen_US
dc.contributor.authorLepine, Ericen_US
dc.date.issued2010en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe present work deals with the study of infrared transparent glasses and their applications for sensor use. Their behavior under LASER irradiation, as well as the possibility to modify the surface, and the exploration of new glass compositions has been studied. Four tasks were completed with the main goal of designing infrared optical sensors. In a first task, the deposition of various thin films at the surface of a chalcogenide glass has been investigated in order to produce nano porous surfaces. Films were produced by vapor deposition and cathodic sputtering. Vapor deposition did not produce homogeneous films while cathodic sputtering lead to layers of controlled thickness which could produce a porous surface by selective etching. In a second task, the possibility of writing waveguide with femtosecond laser was investigated in Ge-Ga-S/Se-CsCl glasses. It was shown that high power leads to negative index changes unfit for light guiding, while low power lead to small positive index change. It was also shown that the filamentation method lead to homogeneous waveguide with large positive index changes. In a third task, photo-induced phenomena were investigated, especially photo-induced fluidity, on the binary system Ge-Se. The study initiated with the work on relaxation of fiber optics of composition Ge-Se₃ Ge-Se₄ and Ge-Se₉ and their response to shear stress under LASER irradiation in the Urbach region. This leads to the determination of their viscosity under irradiation as a function of the power and wavelength used. This preliminary study enabled using this technique for optical tapering of chalcogenide fibers. A tapered fiber was obtained with good control over the diameter, and length of the sensor and improved sensing sensitivity was demonstrated. Finally, exploration of new glassy systems containing no chalcogenide elements but only heavy halide compounds (PbI₂, PbBr₂, CsI…) were investigated. These amorphous ionic compounds lead to infrared window transmitting from 500 nm up to 26 μm, unfortunately their moisture sensitivity as well as poor mechanical and thermal properties did not make them good candidate for sensor applications.en_US
dc.typetexten_US
dc.typeElectronic Dissertationen_US
dc.subjectMaterials Science & Engineeringen_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineMaterials Science & Engineeringen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairLucas, Pierreen_US
dc.contributor.committeememberUhlmann, Donald R.en_US
dc.contributor.committeememberDeymier, Pierreen_US
dc.contributor.committeememberZhang, Xiang-Huaen_US
dc.contributor.committeememberBureau, Brunoen_US
dc.identifier.proquest11367en_US
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