Tai Po-Tse, Hsieh Wen-Feng, Chen Ching-Hsu
Opt Express. 2004 Nov 29;12(24):5827-33. doi: 10.1364/opex.12.005827.
We demonstrate that various optical bottle beams can be directly generated from a tightly focused end-pumped Nd:YVO4 laser. By controlling the size of pump beam and intracavity aperture in a planoconcave cavity, we obtain well contrasting optical bottles with semiconfocal, 1/3-, and 1/5-degenerate cavity configurations. These beams result, respectively, from the superposition of the fundamental mode and the corresponding lowest degenerate transverse eigenmode, which is in-phase at their beam waists. Unlike that of our previous simulation model, this new observation is universal; it is suitable for any kind of gain media in tightly end-pumped lasers.
我们证明，各种光学瓶形光束可以直接从紧聚焦端面泵浦的Nd:YVO4激光器中产生。通过控制平凹腔中泵浦光束的尺寸和腔内孔径，我们获得了具有半共焦、1/3简并和1/5简并腔配置的对比度良好的光学瓶。这些光束分别由基模和相应的最低简并横向本征模叠加产生，它们在束腰处同相。与我们之前的模拟模型不同，这一新观察结果具有普遍性；它适用于紧端面泵浦激光器中的任何增益介质。
