An Unbiased View of KGW Crystal
An Unbiased View of KGW Crystal
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]. Due to limited storage time, Ti:sapphire is usually pumped by frequency-doubled Nd:YAG or Nd:glass strong-point out lasers, which ends up in a cumbersome and complicated procedure with substantial Price tag. Compared with common CPA laser systems, the OPCPA procedure can acquire a shorter pulse period and a higher peak power.
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We utilized a transmission grating (TG) being a dispersive element within our stretcher and compressor. A compact configuration was adopted, in which the stretcher as well as the compressor shared one particular grating similar to that in Ref.
In summary, we shown that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are effective nonlinear supplies for broadband SC era while in the around-infrared and small-wave infrared spectral ranges, when pumped by one hundred eighty fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO generated two octave-spanning SC spectra, which Look at to SC spectra generated in YAG. These materials exhibit fairly equivalent performances to YAG also in terms of threshold and ideal pump pulse energies for SC technology. Having said that, for what worries the chance to work at higher laser pulse repetition rate, YSO, LSO and LYSO exhibit long lasting Procedure only at 10 kHz and quickly degrade (within just a couple of minutes) at twenty kHz. In addition to the reasonably low SC generation threshold (169 nJ), GGG demonstrated excellent general performance traits inside the small-wave infrared Together with the best pump pulse Electricity of 464 nJ, and that is two moments decrease than in YAG: the biggest crimson-shifted spectral broadening and the highest spectral Electricity density, outperforming KGW and YAG crystals in that facet.
-switched manner. The bandwidth from the orthogonal orientation was Obviously much broader. The calculated Fourier completely transform limited pulse period was as limited as sub-a hundred and sixty fs. Underneath the configuration in which The 2 crystals were being put in exactly the same orientation, with the seed enter, the amplified pulse bandwidth was only 3 nm with one hundred eighty μJ Electricity when it broke the dichroic mirrors.
Amplified pulses by having an energy previously mentioned 2.5 mJ might be envisioned by making use of a greater pump electric power to your regenerative amplifier and rendering it work in the saturation degree. The laser fluence of ~1 J/cm2 around the dichroic mirrors is thought to become under the injury threshold of significant-top quality dielectric-coated mirrors.
The opposite was positioned with its Np -axis parallel with the s-polarized course. A comparison was produced involving a configuration Using the crystals positioned in a similar orientation (
Dynamic expression of genes encoding subunits of inward rectifier potassium (Kir) channels during the yellow fever mosquito Aedes aegypti.
]. This process was based upon The point that the spectral emission cross-portion curves vary from one another when laser polarization is paralleled to the different optical axis of Yb-doped double tungstates[
We designed a diode-pumped Yb:KGW regenerative amplifier because the entrance conclude of the kilohertz terawatt laser technique. Broad bandwidth pulses ended up obtained by making use of twin crystals with various orientations in their optical axes[
Even though BGO, GGG, YSO, LSO and LYSO from time to time serve as laser hosts37, They are really largely identified click here as productive scintillators, whose scintillation properties are examined rather well38. Nonetheless, the nonlinear optical Attributes of those crystals and so their prospective to serve as nonlinear materials for SC era especially, and another experiments relating to nonlinear propagation of extreme femtosecond laser pulses, remain extremely inadequately analyzed. Thus far, GGG, LT23,25 and YSO24 were only sketchily tested for SC generation with Ti:sapphire laser pumping, however, to the best of our knowledge, none of the investigated supplies ended up examined with Yb-laser pumping, specifically for what considerations their performance at quite high (tens to numerous kHz) pulse repetition rates.
Tungstates tend to own high Raman coefficients (�?Raman scattering). As a result, they might produce major Raman gain at moderate optical intensities. It is achievable to use the laser crystal by itself as being a Raman converter.
Prognostic affect of late gadolinium improvement in the chance stratification of heart transplant sufferers.
]. The dual-crystal configuration lowers the thermal load on Every single crystal though preserving a higher obtain, and facilitates the compensation of each one’s thermal lensing result. Therefore, the laser cavity can work with a considerable stability vary more than the thermal lensing impact variation.