CRYSTALLINE FLUORIDE FIBER LASER AND CHARACTERIZATION OF RARE EARTH DOPED FIBERS / Laser de fibra monocristalina de fluoretos e caracterização de fibras dopadas com terras raras

AUTOR(ES)

Jonas Jakutis Neto

DATA DE PUBLICAÇÃO

2008

RESUMO

Diode pumped solid state lasers have supplied a large part of the search for high power lasers, with good beam quality, in addition, these lasers are useful for generation of visible laser radiation. Fiber lasers have the capacity to reach these high powers with a good beam quality, due to its special design which confines the radiation through long fiber lengths. In this work were characterized the emission of tellurite glasses and Yb3+ doped fibers, with a blue fluorescence around 500 nm (cooperative effect) and germanates doped with Er3+ and codoped with Yb3+, emitting green and red photons. Furthermore, losses and the gain of a Nd:YLF fiber were characterized, using two different setups, side pump and end pump. As a result, was obtained blue emission in tellurite fibers and an increase of visible emissions in germanate, both glass and fiber, by the use of Yb3+ ions as a sensitizer. For higher Yb3+ concentrations, these germanates got red intensities bigger than green ones. Both the glass fibers pulled, presented the same emission profile of that measured in its respective bulks. The Nd:YLF fiber demonstrated a gain higher than the losses, through end pump setup, characterizing as an amplifier, attesting the possibility for a laser action in future works. It will be a new result, which is unpublished until the present moment, according with our researches, a laser action with this kind of fiber has never been reported.

ASSUNTO(S)

espectroscopia fibras dopadas com terras raras espectroscopia laser de estado sólido laser de estado sólido fibras dopadas com terras raras

Documentos Relacionados

• CRESCIMENTO E CARACTERIZAÇÃO DE FIBRAS MONOCRISTALINAS DE FLUORETOS DO TIPO LiY1-xTRxF4 (TR = TERRAS-RARAS)
• Caracterizações estruturais e espectroscópicas de cerâmicas ferroelétricas de PLZT dopadas com íons de terras raras trivalentes
• Produção e caracterização de vidros de óxidos de metais pesados dopados com terras-raras e nanopartículas metálicas
• Síntese, caracterização e estudo termoanalítico de etanossulfonatos de terras raras
• ESTUDO DO COMPORTAMENTO PTCR EM CERÂMICAS DE BCT DOPADAS COM ÍONS TERRA RARAS.