Fascination About KGW Crystal
Fascination About KGW Crystal
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Publish your investigate on American Element Web page Unravelling the dissociation pathways of acetic acid on electron transfer in potassium collisions: experimental and theoretical experiments.
When ytterbium-doped laser obtain media normally show a small quantum defect, ytterbium-doped tungstates enable for specially compact values. Such as, a 1030-nm Yb:YAG laser would Commonly be pumped all over 940 nm, whereas Yb:KGW or Yb:KYW may very well be most competently pumped around 981 nm.
For a few programs, tungstates offer you a mix of several valuable Attributes. Specifically for passive method locking, ytterbium-doped double tungstates tend to be excellent to other media concerning The mix of higher attain bandwidth, large cross-sections, and comparatively very good thermal properties �?even though in Just about every distinct self-control superior resources could possibly be identified.
The red-shifted Portion of the SC is of realistic importance, especially for what worries the effectiveness of broadly tunable optical parametric amplifiers pumped by the basic harmonics of Yb lasers. The dearth of seed photons inside the very long-wavelength area on the SC spectrum boundaries the amplification effectiveness and leads to pulse-to-pulse Strength fluctuations round the degeneracy location in the optical parametric amplifier. This element is quantified in Fig. 6a by plotting the SC spectra concerning spectral Strength more info density, which was estimated by measuring the Electrical power on the axial Section of SC radiation (that's the sole pretty much beneficial part of SC emission). KGW crystal provides the best spectral Vitality density from the 1200�?450 nm variety, as pointed out in the the latest study30.
The monoclinic crystal structures leads to a pure birefringence, helping to stay clear of thermally induced polarization rotation and depolarization reduction.
Amplified pulses using an energy previously mentioned 2.5 mJ may be expected by applying a better pump electricity to your regenerative amplifier and rendering it get the job done in the saturation level. The laser fluence of ~one J/cm2 over the dichroic mirrors is considered to generally be under the injury threshold of high-high-quality dielectric-coated mirrors.
However, at the time Nd3+:YAG grew to become commercially offered, the curiosity in CaWO4 dropped sharply. In later a long time, specific other tungstate crystals began to catch the attention of plenty of awareness.
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Consequently, with an additional enhancement in our regenerative amplifier, two mJ compressed pulses is often predicted, without harming any ingredient within our compressor.
Figure 4 Beam radius variation on the two crystals even though changing the focal duration with the thermal lensing influence.
相关工作得到了上海扬帆计划、国家重点研发计划、中国科学院战略性先导科技专项、国家自然科学基金项目、上海市优秀学术/技术带头人计划、上海市市级科技重大专项、中国科学院青年创新促进会的支持。（强场激光物理国家重点实验室供稿）
The Yb:KGW laser system incorporates a quasi-a few-level conduct. The online gain in the Yb:KGW crystal wasn't superior: a number of tens of roundtrips have been required to amplify the nanojoule seed to some millijoule stage. So, the gain-narrowing outcome was inevitable in Yb:KGW regenerative amplifiers.
Figure 4 Beam radius variation on the two crystals although transforming the focal duration of the thermal lensing impact.
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