Apresentação Pública de Doutoramento do Aluno Miguel Catela

Apresentação Pública do Plano de Tese de Doutoramento

Aluno: Miguel Catela

Orientador: Prof. Dawei Liang

Coorientadora: Dra. Cláudia R. Vistas

Título da Tese: "Solar laser operation under non-continuous solar tracking, integrado no Programa Doutoral de Engenharia Fisica da Universidade Nova de LisboaTítulo: Solar laser operation under non-continuous solar tracking

Resumo:

 Compared to conventional lasers, solar lasers offer reduced operating costs
and improved environmental sustainability. However, in order to sustain laser emission,
a solar tracking system must continuously operate with high precision, which can
increase energy consumption and lead to reduced system lifetime. To address this
limitation, we propose a novel solar laser head for solar pumping under non-continuous
solar tracking. Using a heliostat, solar radiation was redirected towards a first-stage
parabolic concentrator. At its focus, an aspheric lens further concentrated the solar rays
onto multiple Nd:YAG rods positioned within a single pump cavity. Furthermore, the
system incorporated a homogenizer to ensure stable and uniform pump flux into the
laser rods. Zemax ® and LASCAD TM analysis demonstrated simultaneous and stable 1064
nm continuous-wave solar laser emissions with similar multimode power levels, even
with azimuthal solar tracking errors up to ±0.5ᵒ. More importantly, simultaneous and
stable TEM 00 mode solar laser emissions were also numerically attained under non-
continuous solar tracking.