Abstract

A diode-pumped neodymium-doped gadolinium vanadate (${\rm{Nd}}\!:\!{\rm{GdV}}{{\rm{O}}_4}$) laser is developed as a compact efficient yellow light at 578 nm by means of intracavity stimulated Raman scattering (SRS) in a potassium gadolinium tungstate (KGW) crystal and the second-harmonic generation in a lithium triborate crystal. The SRS process with a shift of ${{768}}\;{\rm{c}}{{\rm{m}}^{- 1}}$ is achieved by setting the polarization of the fundamental wave along the ${N_g}$ axis of the KGW crystal. The self-Raman effect arising from the ${\rm{Nd}}\!:\!{\rm{GdV}}{{\rm{O}}_4}$ crystal is systematically explored by employing two kinds of coating specification for the output coupler. With a specific coating on the output coupler to suppress the self-Raman effect, the maximum output power at 578 nm can reach 3.1 W at a pump power of 32 W. Moreover, two different lengths for the ${\rm{Nd}}\!:\!{\rm{GdV}}{{\rm{O}}_4}$ crystal are individually used to verify the influence of the self-Raman effect on the lasing efficiency.

© 2020 Optical Society of America

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