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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In its elemental kind, potassium has a silvery grey metallic physical appearance, but its compounds (like potassium hydroxide) are more commonly Utilized in industrial and chemical purposes.
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Amplified pulses with the Vitality previously mentioned 2.5 mJ could be anticipated by implementing an increased pump electricity into the regenerative amplifier and making it do the job on the saturation degree. The laser fluence of ~one J/cm2 to the dichroic mirrors is believed to be below the harm threshold of higher-quality dielectric-coated mirrors.
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Last but not least, we investigated the extended-term performances of SC era in crystal samples below exceptional pumping disorders at better laser repetition charges. In doing this, the crystal samples weren't translated and saved inside of a stationary position with respect towards the pump beam in the overall measurement. The examples illustrating sturdy extensive-phrase performances of SC generation in KGW and YAG crystals at large laser repetition costs might be located somewhere else. A lot more especially, secure performance of KGW crystal at two MHz pulse repetition amount underneath incredibly similar pump beam focusing geometry was noted recently30, whereas YAG crystal shown steady efficiency for a number of several hours at two hundred kHz pulse repetition charge Despite having quite tight focusing with the pump beam (NA=0.085)32. The lengthy-term performance exams in LSO, LYSO and YSO disclosed gradual narrowing from the SC spectra within the lengthy-wavelength facet that happened soon after a particular publicity time and will be attributed towards the optical degradation of those components. As an example, in LSO, the onset of spectral narrowing was noticed immediately after (sim twenty) minutes in a laser repetition level of ten kHz, though at a laser repetition amount of twenty kHz, stable SC technology overall performance was observed just for approximately two min.
]. This process was based upon The truth that the spectral emission cross-section curves vary from each other when laser polarization is paralleled to the various optical axis of Yb-doped double tungstates[
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Tungstates are likely to possess significant Raman coefficients (�?Raman scattering). Consequently, they might produce important Raman attain at average optical intensities. It is feasible to use the laser crystal itself to be a Raman converter.
Figure more info 4 Beam radius variation on The 2 crystals although modifying the focal length from the thermal lensing effect.
The origin of your aspect's identify comes from the English term 'potash,' meaning pot ashes, plus the Arabic term qali