Characterization and alignment of microchip lasers for space applications

Detalhes bibliográficos
Autor(a) principal: Sousa, Ana Luísa Antunes de
Data de Publicação: 2022
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10451/56017
Resumo: Tese de mestrado, Engenharia Física, 2022, Universidade de Lisboa, Faculdade de Ciências
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spelling Characterization and alignment of microchip lasers for space applicationslaser microchipQ-switchingeficiênciavidro de érbioemissão laser pulsadaTeses de mestrado - 2022Departamento de FísicaTese de mestrado, Engenharia Física, 2022, Universidade de Lisboa, Faculdade de CiênciasThe focus of this work was the implementation of an assembly process for fixed external microchip laser cavities and the characterization of optical cavities with different configurations. Two test setups were done. In the first, four different laser cavity configurations were assembled, two with CW emission and two with pulsed emission. The pumping was done in an end-pump configuration with a laser diode emitting in the 975 nm region and had QCW1 emission to preserve the active medium. The microchip laser emitted in the 1532 nm region. Depending on the configuration, its emission was CW2 or pulsed. The active media used for this laser were two Er:Yb co-doped phosphate glasses with thicknesses of 1 mm and 1.5 mm. Both active media had HR@1550nm3 coatings as input couplers. The output coupler was externally implemented using a silica glass with a HR@1550nm coating with 98% reflectivity. The results from the CW cavities were compared. To obtain the pulsed emissions, the passive Q-switching technique was employed using a saturable absorber. This optical component was a Co-spinel glass placed inside the cavity with initial transmission of 98%. Two cavities with pulsed emission were assembled using different thicknesses for the active medium and their results were compared. The result was burst emission. It was concluded that factors such as a higher active medium thickness and the addition of the Q-switch led to a lower efficiency. In the second test setup, the previous components were glued to an aluminium substrate to produce a fixed optical cavity with pulsed emission as a commercial product. The manufacturing process proved to be very sensitive and unstable. The test setup was adapted and thrice attempted. The resulting cavity produced QCW emission.Gordo, Paulo Romeu SeabraRepositório da Universidade de LisboaSousa, Ana Luísa Antunes de2023-01-26T09:36:22Z202220222022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10451/56017enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-08T17:03:20Zoai:repositorio.ul.pt:10451/56017Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:06:34.663381Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Characterization and alignment of microchip lasers for space applications
title Characterization and alignment of microchip lasers for space applications
spellingShingle Characterization and alignment of microchip lasers for space applications
Sousa, Ana Luísa Antunes de
laser microchip
Q-switching
eficiência
vidro de érbio
emissão laser pulsada
Teses de mestrado - 2022
Departamento de Física
title_short Characterization and alignment of microchip lasers for space applications
title_full Characterization and alignment of microchip lasers for space applications
title_fullStr Characterization and alignment of microchip lasers for space applications
title_full_unstemmed Characterization and alignment of microchip lasers for space applications
title_sort Characterization and alignment of microchip lasers for space applications
author Sousa, Ana Luísa Antunes de
author_facet Sousa, Ana Luísa Antunes de
author_role author
dc.contributor.none.fl_str_mv Gordo, Paulo Romeu Seabra
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Sousa, Ana Luísa Antunes de
dc.subject.por.fl_str_mv laser microchip
Q-switching
eficiência
vidro de érbio
emissão laser pulsada
Teses de mestrado - 2022
Departamento de Física
topic laser microchip
Q-switching
eficiência
vidro de érbio
emissão laser pulsada
Teses de mestrado - 2022
Departamento de Física
description Tese de mestrado, Engenharia Física, 2022, Universidade de Lisboa, Faculdade de Ciências
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022-01-01T00:00:00Z
2023-01-26T09:36:22Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10451/56017
url http://hdl.handle.net/10451/56017
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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