The Ultimate Guide To KGW Crystal
The Ultimate Guide To KGW Crystal
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For many applications, tungstates supply a combination of numerous useful Attributes. Especially for passive manner locking, ytterbium-doped double tungstates in many cases are superior to other media with regards to The mix of substantial gain bandwidth, big cross-sections, and comparatively fantastic thermal Homes �?Despite the fact that in Each and every certain self-control much better products may very well be discovered.
In its elemental kind, potassium contains a silvery gray metallic appearance, but its compounds (like potassium hydroxide) are more regularly Utilized in industrial and chemical applications.
In contrast, the seed laser is usually amplified to about one mJ under the orthogonal orientation configuration.
The calculated Lower-off wavelengths in the short-wavelength side are in line with the final development of blue-shifted spectral broadening about the bandgap of nonlinear material. The many nonlinear resources made reasonable crimson-shifted spectral broadenings underneath circumstances of exceptional pump pulse energies, with the largest red-change exceeding 2000 nm measured in GGG crystal. Our effects uncovered that GGG and BGO (which also experienced the lowest supercontinuum generation threshold) present durable, optical destruction-cost-free overall performance in a laser repetition charge of 200 kHz, suggesting that these materials are fantastic alternatives to YAG and KGW for minimal threshold, significant common power supercontinuum era while in the near- and quick-wave infrared spectral ranges. We also shown that scintillating Houses of bulk products might be commonly studied inside the filamentation regime, by means of multiphoton excitation applying in close proximity to-infrared femtosecond laser pulses.
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Last but not least, we investigated the extended-term performances of SC era in crystal samples under best pumping circumstances at bigger laser repetition rates. In doing this, the crystal samples weren't translated and held in a stationary situation with respect on the pump beam during the read more total measurement. The illustrations illustrating robust prolonged-term performances of SC generation in KGW and YAG crystals at large laser repetition charges may very well be found in other places. A lot more precisely, steady performance of KGW crystal at two MHz pulse repetition charge beneath extremely very similar pump beam concentrating geometry was described recently30, whereas YAG crystal shown secure efficiency for numerous hours at 200 kHz pulse repetition rate Despite incredibly limited focusing of your pump beam (NA=0.085)32. The lengthy-phrase general performance tests in LSO, LYSO and YSO unveiled gradual narrowing of the SC spectra about the extensive-wavelength side that occurred right after a particular exposure time and could be attributed towards the optical degradation of these resources. As an illustration, in LSO, the onset of spectral narrowing was observed just after (sim 20) minutes at a laser repetition rate of 10 kHz, while in a laser repetition fee of 20 kHz, steady SC era general performance was noticed just for approximately 2 min.
]. This process was depending on The point that the spectral emission cross-part curves vary from each other when laser polarization is paralleled to different optical axis of Yb-doped double tungstates[
The 2-pump laser could give around one hundred twenty W electric power. Roughly 60% of the utmost pump energy was used inside our experiment considering the low efficiency in the dichroic mirrors. Beneath this dual-crystal configuration, our cavity supports a one hundred W pump electrical power input, as mentioned in Segment two.two. Superior-high-quality dichroic mirrors will be used in the future, and laser pulses will be stretched to an extended pulse period.
These materials can be employed for frequency conversion in lasers for extending of tuning array. SRS in crystals is compatible with recent all-strong-condition technologies and presents a very simple, compact signifies of frequency conversion.
The Yb:KGW laser method features a quasi-3-stage behavior. The net get of the Yb:KGW crystal was not substantial: quite a few tens of roundtrips had been necessary to amplify the nanojoule seed to your millijoule amount. Therefore, the gain-narrowing effect was inevitable in Yb:KGW regenerative amplifiers.
Figure 4 Beam radius variation on The 2 crystals while changing the focal length on the thermal lensing outcome.
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