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A record of 680-mW single-frequency red emission at 671.1 nm is demonstrated using a Nd:YVO4 ring laser intracavity frequency-doubled by a type-I critically phase-matched BiB3O6 crystal. Single-frequency tuning over ????red ~ 1.25 nm can be achieved with a thin etalon with reflectivity of 40%. At 1342.5 nm and with a T = 2% transmission output coupler, the laser provides an optimal 1.55 W of single-frequency...
In this work, we demonstrate indeed that complex cascaded second-order nonlinear processes occurring inside the ppKTP crystal are responsible of the KLM operation of a sigma-polarized (lambda=1321nm) Nd:YLF/ppKTP ring laser, over the full range of the ppKTP temperature tuning. The preliminary analysis of the laser emission versus the ppKTP temperature or versus the intra-cavity power demonstrates...
Single-frequency operation of diode-pumped Nd:YLiF4 and Nd:YVO4 continuous-wave (cw) ring lasers are investigated in the 1.31-1.34 mum range, together with their intracavity second-harmonic generation to the red spectral range (0.65-0.67 mum) using either BiB3O6 (BiBO), LiB3O5 (LBO) or periodically-poled KTiOPO4 (ppKTP). Smooth single-longitudinal mode wavelength tuning over Deltalambda~3-4 nm within...
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