Abstract
A compact diode-end-pumped passively Q-switchedNd3+:GdVO4/Cr4+:YAG self-Raman laser at 1176 nm isdemonstrated. When the T0 = 80% Cr4+:YAG saturableabsorber is inserted into the cavity, the maximum Raman laser outputreaches 175 mW with 3.8 W incident pump power. The optical conversionfrom incident to the Raman laser is 4.6% and the slope efficiency is6.5%. The pulse energy, duration, and repetition frequency of thefirst stokes laser are 4.5 μJ, 1.8 ns, and 38.5 kHz, respectively.There is strong blue emission (about 350–400 nm) can be observed inthe Nd3+:GdVO4 crystal when the process of stimulatedRaman scattering occurs, which is induced by the upconversion of theNd3+ ions.
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