The KGW Crystal Diaries
The KGW Crystal Diaries
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Publish your exploration on American Component Internet site Unravelling the dissociation pathways of acetic acid upon electron transfer in potassium collisions: experimental and theoretical studies.
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly huge in contrast with that of Yb:YAG. This permits for large wavelength tunability and for Substantially shorter pulse durations from mode-locked lasers. Values perfectly underneath 100 fs have been reached with passive manner locking.
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are efficient nonlinear elements for broadband SC technology inside the around-infrared and brief-wave infrared spectral ranges, when pumped by 180 fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO produced two octave-spanning SC spectra, which compare to SC spectra manufactured in YAG. These supplies show very related performances to YAG also when it comes to threshold and ideal pump pulse energies for SC technology. Nevertheless, for what considerations the chance to function at substantial laser pulse repetition fee, YSO, LSO and LYSO demonstrate resilient Procedure only at ten kHz and quickly degrade (inside a couple of minutes) at twenty kHz. Aside from the reasonably reduced SC era threshold (169 nJ), GGG demonstrated wonderful performance features inside the short-wave infrared Using the optimum pump pulse Electrical power of 464 nJ, which can be two situations reduced than in YAG: the most important red-shifted spectral broadening and the very best spectral energy density, outperforming KGW and YAG crystals in that facet.
In distinction, the seed laser is often amplified to around 1 mJ underneath the orthogonal orientation configuration.
Amplified pulses having an Power earlier mentioned two.five mJ could be anticipated by implementing the next pump electricity to your regenerative amplifier and rendering it work on the saturation level. The laser fluence of ~one J/cm2 around the dichroic mirrors is thought for being beneath the injury threshold of large-quality dielectric-coated mirrors.
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Dynamic expression of genes encoding subunits of inward rectifier potassium (Kir) channels inside the yellow fever mosquito Aedes aegypti.
The particular spectra were reconstructed by correcting the measured spectra having an account for your filter transmission capabilities and for the sensitivity features with the spectrometers at the info publish-processing stage. The spectral dynamics in Every single sample was calculated by wonderful tuning the pump pulse Electrical power with a computer-controlled attenuator that was built-in in the laser technique. Thermal Power meter EM (Ophir 3A-PF-12) was accustomed to evaluate the SC Electricity which was thereafter utilized to work out the spectral Power density of your SC radiation. All of the measurements had been executed without any translation from the sample with respect to the pump beam.
We designed a diode-pumped Yb:KGW regenerative amplifier given that the entrance end on the kilohertz terawatt laser process. Wide bandwidth pulses ended up obtained by applying dual crystals with various orientations of their optical axes[
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）
-switched output spectrum on the regenerative amplifier supports a sub-one hundred sixty fs pulse amplification. Therefore, pulses with energies of as many as 2 mJ and length down below 200 fs is usually attained making use of larger-high-quality dichroic mirrors plus a broader-spectrum laser seed. This regenerative amplifier functions as a superb get more info pre-amplifier for even more laser amplification.
Determine eight Intra-cavity pulse amplification procedure monitored by an oscilloscope. The pulse underwent an unsaturated amplification due to the mirror injury limitation.
The two energies are marked through the dashed lines and their values are labeled in the plots. The equivalent functions were also noticed in KGW and YAG crystals, whose spectral broadening dynamics are revealed for a comparison in Fig. 4.