Facts About KGW Crystal Revealed
Facts About KGW Crystal Revealed
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For many applications, tungstates present a mix of several useful Homes. In particular for passive mode locking, ytterbium-doped double tungstates tend to be superior to other media when it comes to the combination of substantial acquire bandwidth, significant cross-sections, and relatively good thermal Houses �?Regardless that in Just about every particular willpower better supplies could possibly be found.
In its elemental sort, potassium features a silvery gray metallic visual appeal, but its compounds (which include potassium hydroxide) tend to be more frequently used in industrial and chemical programs.
-switched method. The bandwidth from the orthogonal orientation was clearly A great deal broader. The calculated Fourier renovate constrained pulse duration was as small as sub-160 fs. Beneath the configuration where by the two crystals were being put in a similar orientation, With all the seed input, the amplified pulse bandwidth was only three nm with a hundred and eighty μJ Vitality when it broke the dichroic mirrors.
The comparison with Eyeglasses is acceptable Because the massive attain bandwidth lets e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
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Comparison of spectral Power densities of supercontinua produced during the conditions of ideal pumping from the investigated supplies.
Therefore, with a further improvement inside our regenerative amplifier, 2 mJ compressed pulses could be expected, without having harming any ingredient inside our compressor.
The crimson-shifted Section of the SC spectrum in BGO has the bottom spectral energy density, and that is more info 1–2 orders of magnitude decreased than in the remainder of the products. However, extremely lower Strength threshold of SC era, and lower optimum pump energy in BGO, ought to be pointed out. The approximated spectral Strength densities produced in LSO and LYSO are really similar to YAG all through the major Element of the SC spectrum. The most attention-grabbing acquiring in that regard is GGG crystal, which, In spite of pretty average blue-shifted spectral broadening, produces the largest spectral crimson-change and the best spectral Vitality density during the 1600�?000 nm assortment, which is nearly an get of magnitude bigger than that generated in YAG.
Though BGO, GGG, YSO, LSO and LYSO once in a while function laser hosts37, they are mostly discovered as efficient scintillators, whose scintillation Houses are examined very well38. However, the nonlinear optical Houses of those crystals and so their likely to serve as nonlinear components for SC technology specifically, and some other experiments relating to nonlinear propagation of extreme femtosecond laser pulses, continue to be pretty badly researched. To date, GGG, LT23,twenty five and YSO24 were only sketchily tested for SC generation with Ti:sapphire laser pumping, even so, to the top of our knowledge, none of the investigated elements have been examined with Yb-laser pumping, specifically for what worries their performance at incredibly superior (tens to many kHz) pulse repetition charges.
The Yb:KGW laser program contains a quasi-three-level behavior. The web attain of the Yb:KGW crystal was not significant: quite a few tens of roundtrips ended up needed to amplify the nanojoule seed to a millijoule degree. Consequently, the achieve-narrowing influence was inevitable in Yb:KGW regenerative amplifiers.
Figure four Beam radius variation on The 2 crystals although switching the focal duration with the thermal lensing impact.
The two energies are marked with the dashed lines as well as their values are labeled in the plots. The similar functions have been also observed in KGW and YAG crystals, whose spectral broadening dynamics are shown to get a comparison in Fig. four.