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Dissertations / Theses on the topic 'ZBLAN'

Author: Grafiati

Published: 4 June 2021

Last updated: 21 February 2023

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1

Lu, Hsin-yu. "Development of ZBLAN fiber-based components." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106358.

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With a superior transmittance in the mid-infrared, fluoride fibers such as ZBLAN fibers can be used to develop fiber-based components for that spectrum. In this thesis, we investigate the fusion splicing of ZBLAN fibers as well as the fabrication of long-period gratings and Mach-Zehnder interferometer structures. Average losses in the range of 0.23-0.31 dB are achieved for the fusion splicing among multi-mode and single-mode ZBLAN fibers. In the C- and O-bands, notches of depths ranging from 6-17 dB are obtained with mechanically induced long-periog gratings. All-fiber Mach-Zehnder interferome

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2

Viatroski, Marcos Aurélio. "Análise espectroscópica do sistema vítreo ZBLAN: Er3+ em baixa temperatura." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-05122014-172440/.

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Vidros dopados com íons de elementos terras−raras são amplamente estudados com o objetivo de obtenção de meios ativos para lasers, amplificadores e sensores ópticos. Dentro desta classe de materiais, o vidro ZBLAN dopado com íons de Er+3, tem recebido grande atenção nos últimos anos. No entanto, nenhum estudo em espectroscopia óptica foi realizado para este sistema vítreo (ZBLAN:Er3+) em temperaturas inferiores a 10 K. Nesta dissertação foi promovida com sucesso, através de medidas de absorção, e luminescência entre os multipletos 4S3⁄2 e 4I15⁄2, uma completa identificação ex

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3

Kopp, Fernando Marini. "Análise da emissão de conversão ascendente de energia do sistema vítreo ZBLAN: Er3+ em baixa temperatura." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2006. http://tede2.uepg.br/jspui/handle/prefix/896.

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Made available in DSpace on 2017-07-21T19:26:02Z (GMT). No. of bitstreams: 1 FernandoMarini.pdf: 872940 bytes, checksum: 00bc75841ddcac163c60f80471aee109 (MD5) Previous issue date: 2006-06-07<br>The upconversion process in rare earth elements (Er, Nd, Pr, Tm and Yb) doped fluoride glasses has received great attention from several researches. The main interest is its use in several technological applications as optical amplifiers and lasers. The fluoride glass (ZBLAN) is an amorphous glass and a good rare earth host material with low multiphonon relaxation, good chemical stability under diver

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4

JARDIN, MURIELLE. "Elaboration en phase vapeur des fluorures du verre zblan par la technique omcvd." Le Mans, 1993. http://www.theses.fr/1993LEMA1003.

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Un procede cvd (chemical vapor deposition) est applique a la synthese du verre fluore zblan ou de ses constituants. Les precurseurs des metaux zr, ba, la, al et na sont des complexes de beta-dicetones. Nous les avons synthetises et caracterises aussi completement que possible (dosage, ir, rmn, rx, atg). Nous rappelons leurs proprietes thermiques qui forment le facteur determinant quant a leur utilisation comme precurseur cvd: la volatilisation de al(dpm)#3, na(hpm) et la(dpm)#3 est rapide et pratiquement quantitative a 220c, 240c et 280c, respectivement. Dans le cas de al(dpm)#3, une etude the

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5

Ong, Teng-Cheong. "Research of the suppression effects of cooling rate on crystallization in ZBLAN glass." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/116614/1/Teng-Cheong_Ong_Thesis.pdf.

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ZBLAN glass shows great potential in the application of long-haul telecommunication cables. However, during processing in the fibre-drawing temperature region, the material tends to crystallize, resulting in large transmission losses. In this study, ZBLAN glass was processed with different cooling rates to discern how the rate of cooling affects the process of crystallization. The results of this study revealed that by rapidly cooling ZBLAN test samples, it was possible to completely impede all crystallization phenomena and yield a fully amorphous glass suitable for use as an optical waveguide

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6

Androz, Guillaume. "Étude d'un laser à fibre de ZBLAN dopée au thulium émettant dans le proche infrarouge." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27464/27464.pdf.

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7

Bertrand, Didier. "Etude des conditions d'analyse des traces de fer, cobalt, nickel et cuivre dans les verres fluores zblan." Le Mans, 1991. http://www.theses.fr/1991LEMA1013.

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Le dosage des elements de transition fer, cobalt, nickel et cuivre a l'etat de traces dans les verres fluores necessite une etape de mise en solution acide, mais la dissolution totale du verre n'est pas necessaire. L'analyse du solide residuel montre un melange d'une phase amorphe et des composes cristallises bazr#2f#1#0,2h#2o et nabazr#2f#1#1. La separation elements de la matrice du verre-traces est effectuee par complexation a l'apdc, puis extraction a la dibk. Les rendements de separation sont toujours de l'ordre de 100%. Le dosage final est effectue par absorption atomique electrothermique

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8

Frison, Blaise David. "Single and dual-wavelength lasing in the 800-820 nm and 1460 1520 nm bands in a thulium ZBLAN fibre laser." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114254.

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Tm3+ ions provide amplification in a wide variety of wavelength bands,including 480 nm, 810 nm, 1480 nm, 1900 nm, and 2300 nm. This thesis presentsthe characteristics of lasers fabricated with Tm:ZBLAN fibre as the gain medium.First, a single-wavelength linear cavity fibre laser at 810 nm is presented. Dual-wavelength lasing and bistable behaviour are demonstrated in single cavity lasers,while dual-wavelength lasing, bistable behaviour and wavelength switching are demonstrated in cascaded cavity lasers. Second, single wavelengths fibre lasers at 1480 nm in linear and ring cavities are presente

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9

Blanc, Olivier. "Elaboration sans conteneur sous atmosphères réactives de verres fluorés ZBLAN et optimisation des pertes par diffusion pour l'application aux fibres optiques de télécommunication." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0004.

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Cette etude a ete motivee par la necessite d'eliminer la dispersion observee sur les proprietes optiques de verres fluores zblan elabores par le procede de levitation sur film de gaz a partir de poudres dans des conditions identiques, et egalement de confirmer sur un plus large domaine de longueurs d'onde les excellents niveaux de performances obtenus pour certains de ces echantillons. A partir d'une revue preliminaire des differents facteurs influant typiquement sur la qualite optique des verres de fluorures, la recherche des causes de dispersion nous a conduits a analyser de maniere critique

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10

Gao, Youping. "Les Verres fluorés ZBLAN : étude de la synthèse chimique des fluorures en milieu organique et étude de la dégradation de ces verres en milieu acide (HCl ou HF)." Le Mans, 1991. http://www.theses.fr/1991LEMA1012.

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Un azeotrope a 55% ch#3cn 45% hf (molaire) existe dans le systeme ch#3cn hf. La formule developpee de complexes organometalliques est obtenue a partir de leur structure cristalline determinee par diffraction x sur monocristaux: (fecl#2(ch#3cn)#4) (fecl#4) pour fecl#3, 2ch#3cn; (alcl(ch#3cn)#5)(fecl#4)#2ch#3cn pour fe#0#. #6#6al#0#. #3#3cl#3,2ch#3cn; zr#2f#8(dmso)#4) pour zrf#4, 2dmso; (zrf#4,dmso,(h#2o)#2)(h#2o)#2 pour zrf#4, dmso, 4h#2o. Ces composes ont une teneur en fer abaissee au niveau du ppm poids mais sont pollues par le carbone. Le verre zblan ou des compositions dans les systemes baf

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11

ROGARD, STEPHANIE. "Contribution a l'etude de verres fluores dopes a l'erbium : dosage de er#3#+ dans des fibres optiques actives en zblan, mise en evidence de contraintes dans des pzg : er#3#+ evapores." Le Mans, 1997. http://www.theses.fr/1997LEMA1010.

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Les proprietes de luminescence de l'erbium dans des verres fluores sont exploitees d'une part pour effectuer des dosages de cet ion dans des fibres optiques actives en zblan, et d'autre part pour sonder l'etat de contrainte de films en pzg : er#3#+ obtenus par evaporation. Dans les deux cas, les analyses sont realisees sous microscope au moyen d'un spectrometre raman, la source excitatrice etant un laser a argon ionise. Les dosages de er#3#+ dans le zblan sont deduits d'une etude comparee de l'intensite d'une des bandes de luminescence de l'erbium (evoluant lineairement avec la puissance incid

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12

Ayoub, Anas. "Sources laser ultrarapides performantes dans le moyen IR et le Tz." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR044.

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La sonde atomique tomographique est un instrument d’analyse de la matière à trois dimensions avec une résolution atomique. Cet instrument s’appuie sur l’effet de champ électrique généré à l’extrémité d’un échantillon taillé sous la forme d’une aiguille nanométrique pour faire évaporer les atomes de surface qui sont collectés par un détecteur à deux dimensions. La mesure du temps de vol des ions dont l’évaporation est déclenchée par une impulsion électrique ou optique permettent de remonter à la composition chimique en plus de la localisation 3D des atomes. Dans les sondes atomiques actuelles,

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13

Jagosich, Fábio Henrique. "ESTUDOS DOS PROCESSOS DE TRANSFERÊNCIA DE ENERGIA DOS ÍONS DE Er3+ E Ho3+ PARA OS ÍONS DE Nd3+, Tb3+ E Eu3+ NO CRISTAL DE LiYF4 E NO VIDRO ZBLAN PARA A OTIMIZAÇÃO DE MEIOS LASER ATIVOS QUE OPERAM NA REGIÃO DE 3 µm." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-05062007-135456/.

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Foram estudados os processos de transferência de energia (TE) dos níveis 4I13/2 ; 4I11/2 do Er3+ e 5I7 ; 5I6 do Ho3+ no LiYF4 (YLF) e no ZBLAN, para os íons desativadores Nd3+, Tb3+ ou Eu3+. Os microparâmetros de interação dessas TE foram obtidos utilizandose o método da integral de sobreposição e os resultados indicaram que o íon de Eu3+ é o melhor desativador do primeiro estado excitado do Ho3+ no YLF e o Nd3+ é o mais eficiente desativador do Er3+ no YLF e ZBLAN. A dependência temporal das fluorescências do Er3+ em 1,5 ; 2,7 m e do Ho3+ em 2,1 ; 2,9 m foram medidas utilizandose excitações l

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14

JAGOSICH, FABIO H. "Estudos dos processos de transferência de energia dos íons de Ersup(3+) e Hosup(3+) para os íons de Ndsup(3+), Tbsup(3+) e Eusup(3+) no cristal de LiYFsub(4) e no vidro ZBLAN para a otimização de meios laser ativos que operam na região de 3 microns." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11432.

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Made available in DSpace on 2014-10-09T12:51:51Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:06:32Z (GMT). No. of bitstreams: 0<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP<br>FAPESP:00/11446-0

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15

Olivier, Mélinda. "Guides d'ondes ZBLA dopés Praséodyme réalisés par échange ionique pour émission dans le visible." Phd thesis, Université Rennes 1, 2012. http://tel.archives-ouvertes.fr/tel-00784756.

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Le développement de nouvelles technologies pour l'affichage et la vidéoprojection est au cœur des recherches actuelles. Les sources lasers RGB (Red-Green-Blue) apparaissent comme la solution la plus prometteuse. La miniaturisation de telles sources est un défi mais laisse entrevoir de nombreuses applications. Ce travail de thèse s'inscrit à l'interface de ces deux problématiques : la réalisation d'une source laser RGB efficace à partir d'un unique matériau dans l'optique de réduire les coûts de fabrication, et la miniaturisation de cette source par le développement de guides d'ondes microstruc

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16

Sarker, Md Samiul Islam. "Two micron Tm doped ZBLAN double clad fibre laser." Thesis, 2012. http://hdl.handle.net/2440/73182.

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Tm:ZBLAN fibre lasers have potential applications in many research areas, such as eye safe range detection, medical science and materials processing. In this thesis we investigate improving the laser performance of a thulium doped fluoride fibre (specifically ZBLAN) to generate laser output with wavelengths near 2 μm. Two approaches are demonstrated to investigate laser performance at 2 μm. One is 790 nm pumping in which the cross-relaxation mechanism is used for efficient operation by populating the upper laser level. Another is in-band pumping, where 1570 nm light is directly pumps the emitt

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17

Henderson-Sapir, Ori. "Development of dual-wavelength pumped mid-infrared fibre laser." Thesis, 2015. http://hdl.handle.net/2440/103471.

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There is an urgent need for efficient and compact sources of coherent mid-infrared wavelength radiation (3-5 μm). Cost-effective and bright mid-infrared sources will lead to exciting new sensing applications, ranging from the remote sensing of greenhouse gases, such as CO₂ and methane, to analysis of trace gases in exhaled breath for disease marker identification. The last decade has seen a continuing increase in the output power of various types of mid-infrared sources, such as optical parametric oscillators and amplifiers, quantum cascade lasers and fibre lasers. However, advances in brightn

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18

Petreski, Bill Petar. "Characterisation of optical fibre amplifiers: amplifiers for the 632.8 nm He-Ne wavelength in praseodymium-doped ZBLAN." Thesis, 1997. https://vuir.vu.edu.au/15750/.

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An investigation of small-signal amplification on the 3Po-3F2 transition in a praseodymium-doped fluorozirconate optical fibre at the 632.8 nm He-Ne wavelength, has been conducted. The optical gain is fundamentally related to the spectroscopic characteristics of praseodymium-doped in a fluorozirconate glass host together with optical fibre parameters, that determine the physical characteristics of the waveguide. These parameters have been experimentally determined independently of the gain and used to model the performance of the amplifier.

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19

Falconi, Mario Christian. "Design and Fabrication of Optical Fiber Sources in the Middle Infrared." Doctoral thesis, 2019. http://hdl.handle.net/11589/161085.

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In questa tesi viene svolto un accurato studio di fattibilità di diversi laser in fibra per applicazioni nel medio infrarosso tramite software fatti in casa. Vengono proposti diversi vetri drogati e schemi di pompaggio. In particolare, la tesi riporta i risultati di simulazioni riferite a: i) una sorgente ottica ottimizzata che sfrutta una configurazione MOPA (master oscillator power amplifier), con lunghezze d'onda di pompa e segnale pari a 1709 nm e 4384 nm, rispettivamente; ii) la progettazione di un efficiente schema di pompaggio per un laser in fibra Dy3+:Ga5Ge20Sb10Sb10S65 che fornisce u

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