INVESTIGADORES
TORCHIA Gustavo Adrian
congresos y reuniones científicas
Título:
Buried Waveguides in Nd:YFL crystals obtained by femtosecond laser writing under double line approach
Autor/es:
D. BIASETTI, E. NEYRA, M.R. TEJERINA, J. RODRIGUEZ VAZQUEZ DE ALDANA, L. ROSO, G.A. TORCHIA
Lugar:
Playa del Carmen
Reunión:
Conferencia; Conference on Laser Ablation (COLA); 2011
Resumen:
In this paper, we present buried waveguides fabricated by fs laser writing in Nd3+ doped YFL crystal under double line approach [3]. The waveguides were made by focusing two consecutive optical breakdown tracks (OBT) separated about 20 mm. To make the optimal OBT, we have focused the fs laser pulses 200 mm
below to the surface at intensities above the OB threshold for the
material and controlling the writing velocity. The guiding structures
were fabricated by using The CPA femtosecond (fs) laser system. We have
chosen optimal writing parameters in order to obtain suitable
waveguides, using around 3 mJ and writing velocity from 10 m/s up to 50 mm/s.
After explore optically the waveguides by end fire coupling, the
guiding structures showed well optical performance. Reconstruction of
the guiding profiles was retrieved from the modal analysis from the
waveguides structures by using BeamProp (RSOFT) commercial software.
The spatial distribution of the index increment by taking into account
the lower refractive barrier on the OBT region plus the compressed
region between the tracks, has been obtained from the fit correctly
profiles modes obtained. Finally, optical spectroscopy measurements were
also performed in the waveguides, the results showed that the
luminescence properties are preserved in the waveguides compared with
values obtained for bulk.