An Unbiased View of KGW Crystal
An Unbiased View of KGW Crystal
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The get bandwidth e.g. of Yb:KGW and Yb:KYW is rather huge when compared with that of Yb:YAG. This allows for large wavelength tunability and for Considerably shorter pulse durations from manner-locked lasers. Values well below a hundred fs have already been attained with passive manner locking.
In addition to its use like a Raman crystal, KGW is likewise Employed in other optical applications, which include in laser methods and for a scintillator in professional medical imaging.
-switched mode. The bandwidth while in the orthogonal orientation was Obviously Significantly broader. The calculated Fourier completely transform confined pulse period was as shorter as sub-160 fs. Underneath the configuration where The 2 crystals were being positioned in the exact same orientation, Along with the seed enter, the amplified pulse bandwidth was only 3 nm with 180 μJ Power when it broke the dichroic mirrors.
Amplified pulses with the Vitality earlier mentioned two.5 mJ might be expected by applying the next pump power to the regenerative amplifier and making it function on the saturation level. The laser fluence of ~one J/cm2 to the dichroic mirrors is believed for being beneath the damage threshold of substantial-top quality dielectric-coated mirrors.
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KGW (potassium gadolinium tungstate) is actually a crystal that is usually used being a Raman crystal in Raman spectroscopy. It's a colorless, clear crystal that includes a higher Raman scattering efficiency and a powerful Raman spectrum, which makes it ideal for An array of Raman purposes.
The particular spectra were reconstructed by correcting the measured spectra by having an account for that filter transmission capabilities and for that sensitivity capabilities from the spectrometers at the information put up-processing stage. The spectral dynamics in each sample was measured by great tuning the pump pulse Power with a computer-controlled attenuator that was integrated while in the laser process. Thermal Power meter EM (Ophir 3A-PF-twelve) was used to measure the SC Electrical power which was thereafter used to calculate the spectral Electrical power density of the SC radiation. Each of the measurements have been done with none translation with the sample with respect to the pump beam.
The threshold Strength for SC technology (hbox E _ textrm th ) was outlined since the pump pulse Power, where by the blue-shifted spectral broadening speedily settles to a certain Minimize-off wavelength That is still almost constant Despite having further more boost with the pump pulse Power. The ideal Electricity (hbox E _textrm opt ), was defined since the pump pulse Electrical power, which produces the largest purple-shifted spectral broadening ahead of the onset of periodic modulation from the SC spectrum due to filament refocusing.
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）
A multi-move most important amplifier will even further Enhance the Strength to above 40 mJ. We're going to apply cryogenically cooled Yb:KGW technological know-how to restrain the thermal impact. Two phases of compression might be employed just after amplification. The very first phase will involve a common Treacy-sort compressor, and could compress the heartbeat length to underneath three hundred fs with an efficiency of about 70%. The next phase involves a gas-filled multi-pass mobile[
Prognostic impression of late gadolinium enhancement in the chance stratification of coronary heart transplant sufferers.
Assembling tungsten oxide hydrate nanocrystal colloids fashioned by laser ablation in liquid into fast-response electrochromic films.