Open AccessYVO_4 Raman laser pumped by a passively Q-switched Yb:YAG laser
Author(s) -
Wei Jiang,
Zhen Li,
Siqi Zhu,
Hao Yin,
Zhenqiang Chen,
Ge Zhang,
Weidong Chen
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.014033
Subject(s) - materials science , raman spectroscopy , optics , laser , raman laser , q switching , fabry–pérot interferometer , raman scattering , slope efficiency , energy conversion efficiency , optoelectronics , fiber laser , physics
We have experimentally demonstrated passively Q-switched (PQS) stimulated Raman scatting (SRS) emissions in an a-cut YVO 4 Raman crystal in a coupled cavity, using a Yb:YAG/YAG/Cr 4+ :YAG/YAG composite crystal to generate the PQS fundamental laser, for the first time, to our best knowledge. At the incident pump power of 6.30 W, the Stokes average output power of 0.42 W was achieved. Due to the cascaded Raman effect, four first-Stokes lines operating at 1092.6 nm, 1125.4 nm, 1135.1 nm and 1157.0 nm and three second-Stokes lines operating at 1210.6 nm, 1263.2 nm and 1290.1 nm were generated simultaneously. It is noted that the spectral broadening of the fundamental field was observed. With the inclusion of an etalon in the fundamental cavity to suppress the spectral broadening, the average output power of the Stokes lines increased to 0.49 W and the maximum pulse energy was enhanced up to 84.30 μJ, corresponding to the diode-to-Stokes conversion efficiency of 7.78%.