在同质散装材料中以76 MHz的脉冲重复率产生低值超连续性
Optics letters
|September 1, 2023
概括
研究人员使用Yb:KGW振荡器在散装加多 tungstate (KGW) 中实现了高功率,低值超连续生成. 这种强大,无损的方法产生了八度跨度的超连续体,为先进的光学应用铺平了道路.
科学领域:
- 激光物理 激光物理
- 非线性光学是非线性光学.
- 材料科学 材料科学 材料科学
背景情况:
- 对各种光谱和光子应用来说,超级连续的生成至关重要.
- 在散装材料中实现高平均功率和低值仍然是一个挑战.
研究的目的:
- 为了证明高平均功率,在同质散装材料中低值超连续生成.
- 为了研究无兴奋剂金酸 (KGW) 对此应用的性能.
主要方法:
- 使用一个Yb:KGW振荡器,以76MHz的脉冲重复率工作.
- 使用放大和不放大脉冲用于超级连续生成.
- 使用导线诱导的发光,角度分辨率的光谱测量和第二波频率分辨率的光学关 (SHG-FROG) 来描述超级连续体.
主要成果:
- 在未使用过的KGW中产生了八度跨度超连续,总平均功率为6.4W.
- 证明了强大,无损,长期的性能.
- 观察到的特征现象包括光束线,形发射和相回收脉冲分裂.
结论:
- 无毒化KGW是用于高功率,低值超连续生成的有希望的材料.
- 观察到的现象证实了超级连续的生成过程.
- 该技术为生产宽带光源提供了稳定高效的方法.
相关概念视频
01:17NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
01:12Double Resonance Techniques: Overview
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...