Not known Details About KGW Crystal
Not known Details About KGW Crystal
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Publish your investigate on American Aspect Web site Unravelling the dissociation pathways of acetic acid on electron transfer in potassium collisions: experimental and theoretical reports.
Even though ytterbium-doped laser attain media normally show a small quantum defect, ytterbium-doped tungstates allow for notably little values. For instance, a 1030-nm Yb:YAG laser would Typically be pumped all around 940 nm, Whilst Yb:KGW or Yb:KYW might be most efficiently pumped all around 981 nm.
Figure 8 Intra-cavity pulse amplification approach monitored by an oscilloscope. The heartbeat underwent an unsaturated amplification due to mirror hurt limitation.
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are successful nonlinear products for broadband SC technology while in the near-infrared and quick-wave infrared spectral ranges, when pumped by a hundred and eighty fs fundamental harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO generated two octave-spanning SC spectra, which Evaluate to SC spectra created in YAG. These components exhibit pretty very similar performances to YAG also concerning threshold and best pump pulse energies for SC generation. Nonetheless, for what considerations the likelihood to work at high laser pulse repetition amount, YSO, LSO and LYSO demonstrate long lasting operation only at ten kHz and immediately degrade (inside of a few minutes) at twenty kHz. Besides the relatively very low SC generation threshold (169 nJ), GGG shown excellent general performance characteristics while in the small-wave infrared Together with the exceptional pump pulse Vitality of 464 nJ, which can be two periods reduced than in YAG: the biggest pink-shifted spectral broadening and the best spectral Strength density, outperforming KGW and YAG crystals in that factor.
The monoclinic crystal structures brings about a pure birefringence, assisting to stay clear of thermally induced polarization rotation and depolarization reduction.
The comparison with glasses is suitable For the reason that massive acquire bandwidth enables e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
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Comparison of spectral Power densities of supercontinua manufactured while in the situations of exceptional pumping while in the investigated supplies.
Though BGO and LT manufactured the narrowest SC spectra (marginally fewer than 1.5 optical octaves), they might be considered as extremely desirable nonlinear components for broadband SC technology with pumping at more time laser wavelengths. Owing to its significant nonlinearity, BGO exhibited the bottom SC technology threshold (seventy eight nJ) Amongst the investigated supplies, that's twenty five % reduce than in KGW and could be considered as great nonlinear material for really minimal-threshold SC generation. The observed steady and durable injury-no cost overall performance of BGO and GGG at 200 kHz pulse repetition fee indicates that these nonlinear elements have a possible for SC era at even increased, MHz, repetition premiums. Also, these resources provide SC radiation with a wonderful list of parameters that are important for apps in significant pace spectroscopy and imaging that make use of bulk-produced SC, see e.g.17,18,19,20.
The two-pump laser could offer you nearly 120 W energy. Around sixty% of the utmost pump electric power was utilized within our experiment looking at the low overall performance of the dichroic mirrors. Less than this twin-crystal configuration, our cavity supports a 100 W pump energy input, as mentioned in Area 2.two. Higher-high quality dichroic mirrors will be utilised Down the road, and laser pulses will likely be stretched to a longer pulse duration.
Even though BGO, GGG, YSO, LSO and LYSO occasionally serve as laser hosts37, They're largely identified as successful scintillators, whose scintillation Houses are studied fairly well38. Having said that, the nonlinear optical Qualities of these crystals and so their possible to function nonlinear products for SC technology particularly, and some other experiments about nonlinear propagation of intense femtosecond laser pulses, continue to be really badly studied. So far, GGG, LT23,25 and YSO24 ended up only sketchily tested for SC era with Ti:sapphire laser pumping, even so, to the most beneficial of our understanding, none of the investigated supplies had been examined with Yb-laser pumping, especially for what fears their overall performance at quite higher (tens to countless kHz) pulse repetition charges.
The Yb:KGW laser system includes a quasi-3-amount actions. The net obtain in the Yb:KGW check here crystal wasn't superior: several tens of roundtrips had been necessary to amplify the nanojoule seed to your millijoule amount. As a result, the attain-narrowing effect was inevitable in Yb:KGW regenerative amplifiers.
Figure 8 Intra-cavity pulse amplification course of action monitored by an oscilloscope. The heart beat underwent an unsaturated amplification as a result of mirror hurt limitation.
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