Wagner Volker, Paa Wolfgang, Knappe Christoph, Triebel Wolfgang
Institut für Photonische Technologien, Albert-Einstein-Strasse 9, 07745 Jena, Germany.
Appl Opt. 2010 Feb 20;49(6):1020-4. doi: 10.1364/AO.49.001020.
We investigate the characteristics of a thin disk laser system based on the master oscillator-power amplifier design. The amplifier emits parasitic laser oscillation (PL) when the wavelength of the tunable narrow-bandwidth seed pulse is detuned more than 4 nm from the gain maximum at 1030 nm. For suppression of this unwanted PL, a birefringent filter (Lyot filter) was inserted into the amplifier cavity in order to generate wavelength selective losses, especially at the gain maximum of the Yb:YAG crystal. It is shown that the tunability range of the laser system can be extended by a factor of 4, when a properly chosen Lyot filter is applied and its angle of rotation is adapted to the seed wavelength of the system.
我们研究了基于主振荡器 - 功率放大器设计的薄盘激光系统的特性。当可调谐窄带宽种子脉冲的波长与1030nm处的增益最大值失谐超过4nm时，放大器会发射寄生激光振荡（PL）。为了抑制这种不需要的PL，在放大器腔中插入了一个双折射滤波器（利奥滤光片），以产生波长选择性损耗，特别是在Yb:YAG晶体的增益最大值处。结果表明，当应用适当选择的利奥滤光片并将其旋转角度调整到系统的种子波长时，激光系统的可调谐范围可以扩大4倍。
