The smart Trick of KGW Crystal That No One is Discussing
The smart Trick of KGW Crystal That No One is Discussing
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Former perform showed that the dual-crystal configuration can be used to compensate for your thermal lensing result[
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Later on, an investigation on the spectral attain curve of Yb:KGW in the key amplifier might be carried out less than cryogenic temperature evolution from 77 K to 300 K. The working temperature will likely be controlled to understand broader attain bandwidth and less change in the central wavelength of the principle amplifier.
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are effective nonlinear products for broadband SC era from the in the vicinity of-infrared and quick-wave infrared spectral ranges, when pumped by a hundred and eighty fs basic harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO generated two octave-spanning SC spectra, which Assess to SC spectra produced in YAG. These components show rather comparable performances to YAG also regarding threshold and best pump pulse energies for SC era. Nevertheless, for what worries the chance to work at higher laser pulse repetition fee, YSO, LSO and LYSO exhibit strong Procedure only at 10 kHz and speedily degrade (within just a couple of minutes) at twenty kHz. Aside from the somewhat low SC technology threshold (169 nJ), GGG demonstrated exceptional functionality properties during the short-wave infrared with the optimal pump pulse Electrical power of 464 nJ, and that is two moments reduced than in YAG: the largest crimson-shifted spectral broadening and the best spectral Electrical power density, outperforming KGW and YAG crystals in that aspect.
-switched manner. The bandwidth within the orthogonal orientation was Plainly A great deal broader. The calculated Fourier change confined pulse duration was as small as sub-a hundred and sixty fs. Under the configuration where The 2 crystals were put in the exact same orientation, Together with the seed enter, the amplified pulse bandwidth was only 3 nm with 180 μJ Strength when it broke the dichroic mirrors.
The calculated Reduce-off wavelengths on the limited-wavelength facet are in line with the overall pattern of blue-shifted spectral broadening over the bandgap of nonlinear material. Each of the nonlinear components generated fair crimson-shifted spectral broadenings less than disorders of optimum pump pulse energies, with the biggest crimson-change exceeding 2000 nm measured in GGG crystal. Our final results unveiled that GGG and BGO (which also experienced the bottom supercontinuum era threshold) offer sturdy, optical damage-absolutely free effectiveness in a laser repetition rate of two hundred kHz, suggesting that these supplies are fantastic alternate options to YAG and KGW for very low threshold, significant typical ability supercontinuum technology while in the near- and short-wave infrared spectral ranges. We also demonstrated that scintillating Houses of bulk products may be readily analyzed from the filamentation regime, by means of multiphoton excitation applying close to-infrared femtosecond laser pulses.
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Dynamic expression of genes encoding subunits of inward rectifier potassium (Kir) channels while in the yellow fever mosquito Aedes aegypti.
Hence, with an additional advancement in our regenerative amplifier, two mJ compressed pulses can be envisioned, without harmful any component inside of our compressor.
The threshold Electrical power for SC era (hbox E _ textrm th ) was described since the pump pulse Electricity, in which the blue-shifted spectral broadening rapidly settles to a particular Slash-off wavelength that remains almost constant In spite of further more boost from the pump pulse energy. get more info The the best possible Power (hbox E _textrm opt ), was described since the pump pulse Strength, which creates the largest purple-shifted spectral broadening before the onset of periodic modulation within the SC spectrum on account of filament refocusing.
These products can be employed for frequency conversion in lasers for extending of tuning assortment. SRS in crystals is compatible with existing all-reliable-condition technological innovation and supplies a very simple, compact indicates of frequency conversion.
-switched output spectrum from the regenerative amplifier supports a sub-a hundred and sixty fs pulse amplification. Therefore, pulses with energies of nearly 2 mJ and period beneath two hundred fs might be acquired employing greater-excellent dichroic mirrors and a broader-spectrum laser seed. This regenerative amplifier will work as a very good pre-amplifier for even more laser amplification.
Figure 4 Beam radius variation on The 2 crystals whilst switching the focal size of the thermal lensing influence.
Equally energies are marked through the dashed lines as well as their values are labeled inside the plots. The similar capabilities have been also observed in KGW and YAG crystals, whose spectral broadening dynamics are demonstrated for just a comparison in Fig. 4.