An Unbiased View of KGW Crystal
An Unbiased View of KGW Crystal
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The 1st two peaks might be connected to luminescence of pure material59, while the remaining peaks might be attributed towards the luminescence of unidentified dopants, Even though the supplier specified the sample as undoped. The luminescence of YAG crystal makes solid UV luminescence using a most depth at 300 nm, which happens to be attributed to mixed self-trapped exciton and antisite defect-relevant emissions60. Lastly, no luminescence while in the UV, seen and in the vicinity of-IR was observed in KGW and LT crystals, no less than inside the detection choice of fiber spectrometer (200�?00 nm).
-switched manner. The bandwidth in the orthogonal orientation was Evidently Substantially broader. The calculated Fourier remodel constrained pulse duration was as brief as sub-a hundred and sixty fs. Underneath the configuration in which The 2 crystals have been placed in the exact same orientation, While using the seed input, the amplified pulse bandwidth was only three nm with 180 μJ Vitality when it broke the dichroic mirrors.
]. Etalon insertion would bring about supplemental decline, on the other hand, time-to-time optimization would introduce the potential risk of element damage and instability on the method. A nonlinear regenerative amplifier could directly supply pulses which has a period as little as ninety seven fs as well as a spectral bandwidth of 19 nm[
Sooner or later, we will undertake a laser seed having a broader spectral bandwidth and apply an acousto-optical programmable dispersive filter to modulate the seed’s spectrum to generate complete use from the acquire bandwidth of our regenerative amplifier.
KGW (potassium gadolinium tungstate) is actually a crystal that is usually utilised to be a Raman crystal in Raman spectroscopy. It's really a colorless, transparent crystal which has a superior Raman scattering performance and a solid Raman spectrum, rendering it appropriate for A variety of Raman purposes.
Hence, with an additional improvement in our regenerative amplifier, two mJ compressed pulses is often predicted, devoid of harming any ingredient inside our compressor.
The two-pump laser could present approximately a hundred and twenty W electrical power. Roughly sixty% of the most pump electricity was used inside our experiment looking at the very low effectiveness with the dichroic mirrors. Beneath this dual-crystal configuration, our cavity supports a one hundred W check here pump power enter, as reviewed in Area two.two. High-excellent dichroic mirrors will likely be made use of in the future, and laser pulses is going to be stretched to an extended pulse length.
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 technique features a quasi-3-level habits. The net get from the Yb:KGW crystal wasn't large: several tens of roundtrips ended up needed to amplify the nanojoule seed into a millijoule level. Consequently, the gain-narrowing result was inescapable in Yb:KGW regenerative amplifiers.
Effect of potassium supplementation on vascular function: A meta-Examination of randomized managed trials.
Assembling tungsten oxide hydrate nanocrystal colloids fashioned by laser ablation in liquid into rapidly-response electrochromic movies.