Pavel Nicolaie, Lünstedt Kai, Petermann Klaus, Huber Günter
National Institute for Laser, Plasma and Radiation Physics, Solid-State Quantum Electronics Laboratory, 077125 Bucharest, Romania.
Appl Opt. 2007 Dec 1;46(34):8256-63. doi: 10.1364/ao.46.008256.
The laser performances of the 1.06 microm (4)F(3/2) --> (4)I(11/2) four-level transition and of the 0.9 microm (4)F(3/2) --> I(9/2)4 quasi-three-level transition were investigated using multipass pumped Nd-based media in thin-disk geometry. When pumping at 0.81 microm into the (4)F(5/2) level, continuous-wave laser operation was obtained with powers in excess of 10 W at 1.06 microm, in the multiwatt region at 0.91 microm in Nd:YVO(4) and Nd:GdVO(4), and at 0.95 microm in Nd:YAG. Intracavity frequency-doubled Nd:YVO(4) thin-disk lasers with output powers of 6.4 W at 532 nm and of 1.6 W at 457 nm were realized at this pumping wavelength. The pumping at 0.88 microm, which is directed into the (4)F(3/2) emitting level, was also employed, and Nd:YVO(4) and Nd:GdVO(4) thin-disk lasers with ~9 W output power at 1.06 microm and visible laser radiation at 0.53 microm with output power in excess of 4 W were realized. Frequency-doubled Nd:vanadate thin-disk lasers with deep blue emission at 0.46 microm were obtained under pumping directly into the (4)F(3/2) emitting level.
利用薄片几何结构中多程泵浦的钕基介质，研究了1.06微米（4）F（3/2）→（4）I（11/2）四能级跃迁和0.9微米（4）F（3/2）→I（9/2）4准三能级跃迁的激光性能。当在0.81微米处泵浦到（4）F（5/2）能级时，在1.06微米处获得了连续波激光运转，功率超过10瓦；在Nd:YVO₄和Nd:GdVO₄中，0.91微米处为多瓦功率区域，在Nd:YAG中0.95微米处也获得了连续波激光运转。在该泵浦波长下，实现了腔内倍频的Nd:YVO₄薄片激光器，在532纳米处输出功率为6.4瓦，在457纳米处输出功率为1.6瓦。还采用了在0.88微米处泵浦并直接进入（4）F（3/2）发射能级的方式，实现了Nd:YVO₄和Nd:GdVO₄薄片激光器，在1.06微米处输出功率约为9瓦，在0.53微米处有可见激光辐射，输出功率超过4瓦。在直接泵浦进入（4）F（3/2）发射能级的情况下，获得了在0.46微米处有深蓝色发射的倍频Nd:钒酸盐薄片激光器。
