Structure, spectroscopy and laser performance of an Er:YGGAG crystal.
Opt Express
; 31(14): 23631-23641, 2023 Jul 03.
Article
en En
| MEDLINE
| ID: mdl-37475443
ABSTRACT
In this work, we report on investigations of structure, spectroscopic properties and laser performances of, what we believe to be, a novel ErYGGAG laser crystal. High crystalline quality is proved by an FWHW of XRC of 0.019°. Thermal conductivity of a 30 at.% ErYGGAG crystal is determined as 4.98 W/(m·K). The refractive index is measured in the range of 400 to 1000â
nm and fitting with Sellmeier equation is done. A broad fluorescence emission band is located at 2786â¼2819â
nm, suggesting that this crystal is favorable to realize tunable and ultrafast laser. Under the pump at 969â
nm with a fiber-coupled diode laser, at 400â
Hz repetition rate and 600 µs pulse duration, the 30 at.% ErYGGAG delivered maximum average power of 506â
mW with overall optical-to-optical efficiency of 12.4% and slope efficiency of 16.9%. The laser beam quality was characterized by M2 factors of 1.53 and 1.39 in horizontal and vertical directions, respectively.
Texto completo:
1
Banco de datos:
MEDLINE
Idioma:
En
Año:
2023
Tipo del documento:
Article