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Three-level Nd:YLF Raman laser directly pumped by a beam shaped diode bar
Registro en:
10.1117/12.2544844
0000-0002-9379-9530
Autor
BERECZKI, A.
PAES, JOAO P.F.
WETTER, NIKLAUS U.
SPIE PHOTONICS WEST; SPIE LASE
Resumen
Low heat generation can be obtained when pumping Nd:YLF at wavelengths of 872 nm and 880 nm and emitting at the
three-level transition of 908 nm. These transitions show very low quantum defect with efficiencies of 0.96 and 0.97,
respectively. However, the low average absorption cross-section at these wavelengths makes efficient absorption even
for longitudinal pump setups difficult. Using a beam-shaped pump diode instead of a fiber-coupled diode bar may be an
effective means of increasing absorption because it can provide for ??-polarized radiation which shows higher absorption
cross section. In this work, a Nd:YLF was pumped at 872 nm by a diode bar using beam-shaping. Results were
compared to pumping at 872 and 880 nm with non-polarized fiber-coupled diodes. Stimulated Raman scattering was also
obtained with a KGW crystal generating first Stokes emissions at 990 nm and 976 nm. Funda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP) Coordena????o de Aperfei??oamento de Pessoal de N??vel Superior (CAPES) FAPESP: 19/23700-4; 17/05854-9 CAPES: 001