Not known Details About KGW Crystal
Not known Details About KGW Crystal
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The 1st two peaks may very well be related to luminescence of pure material59, although the remaining peaks might be attributed to the luminescence of unknown dopants, Even though the supplier specified the sample as undoped. The luminescence of YAG crystal provides potent UV luminescence by using a highest depth at three hundred nm, and that is attributed to blended self-trapped exciton and antisite defect-associated emissions60. At last, no luminescence while in the UV, visible and in the vicinity of-IR was observed in KGW and LT crystals, at the least within the detection variety of fiber spectrometer (two hundred�?00 nm).
-switched method. The bandwidth from the orthogonal orientation was Plainly A great deal broader. The calculated Fourier transform restricted pulse duration was as brief as sub-160 fs. Underneath the configuration where by The 2 crystals ended up positioned in the exact same orientation, Along with the seed input, the amplified pulse bandwidth was only 3 nm with a hundred and eighty μJ Electricity when it broke the dichroic mirrors.
Amplified pulses using an Strength earlier mentioned 2.5 mJ can be anticipated by making use of a greater pump energy towards the regenerative amplifier and making it do the job for the saturation stage. The laser fluence of ~1 J/cm2 on the dichroic mirrors is considered to get down below the injury threshold of substantial-high-quality dielectric-coated mirrors.
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Comparison of spectral Electricity densities of supercontinua manufactured during the problems of ideal pumping in the investigated resources.
Consequently, with an additional improvement inside our regenerative amplifier, two mJ compressed pulses might be expected, without having damaging any part inside our compressor.
Figure four Beam radius variation on The 2 crystals whilst transforming the focal duration from the thermal lensing influence.
Whilst BGO, GGG, YSO, LSO and LYSO sometimes function laser hosts37, They are really mainly discovered as effective scintillators, whose scintillation properties are researched pretty well38. Nonetheless, the nonlinear optical Attributes of these crystals and so their probable to function nonlinear elements for SC era especially, and any other experiments concerning nonlinear propagation of extreme femtosecond laser pulses, continue to be incredibly improperly examined. To date, GGG, LT23,25 and YSO24 have been only sketchily analyzed for SC technology with Ti:sapphire laser pumping, however, to the very best of our expertise, none of the investigated components had been examined with Yb-laser pumping, especially for what concerns their performance at really significant (tens to many hundreds of kHz) pulse repetition premiums.
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An illustration of such behaviour is shown in Fig. 7a. The character of spectral adjustments is highlighted in Fig. 7d, which displays how the SC spectrum to the extensive-wavelength facet shrinks noticeably, from 1800 nm to 1450 nm, just right after eight minutes of exposure time inside a stationary sample. LT crystal demonstrated somewhat better long-time period general performance: at pulse repetition fees of as many as one hundred kHz no narrowing on either facet on the SC spectrum was detected. Even so, fast narrowing of the SC spectrum in LT crystal was observed following the first five minutes of Procedure when the heartbeat repetition rate was established at two hundred kHz (info not revealed). click here In contrast to the above mentioned supplies, BGO and GGG shown superb SC era performances without any spectral improvements in a pulse repetition charge of two hundred kHz, as attested by the point series of SC spectra in BGO and GGG, proven in Fig. 7b and c, respectively. Determine 7e and file define equivalent shapes of SC spectra at first and at the conclusion of one hour-lasting measurement in the two components.