Fascination About KGW Crystal
Fascination About KGW Crystal
Blog Article
PDF Please find a format to avoid wasting. By utilizing this provider, you concur that you're going to only continue to keep material for private use, and will likely not overtly distribute them by way of Dropbox, Google Push or other file sharing services Be sure to verify you take the terms of use. Cancel
Even though ytterbium-doped laser achieve media usually exhibit a small quantum defect, ytterbium-doped tungstates let for significantly smaller values. For instance, a 1030-nm Yb:YAG laser would Generally be pumped around 940 nm, whereas Yb:KGW or Yb:KYW can be most successfully pumped all-around 981 nm.
Remember to enter information on the conflict of curiosity or choose 'No'. Be sure to tick the box to substantiate you conform to our Phrases of use. *
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are successful nonlinear resources for broadband SC technology while in the near-infrared and small-wave infrared spectral ranges, when pumped by a hundred and eighty fs elementary harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO manufactured two octave-spanning SC spectra, which Examine to SC spectra generated in YAG. These products exhibit really very similar performances to YAG also when it comes to threshold and ideal pump pulse energies for SC era. Having said that, for what concerns the possibility to operate at large laser pulse repetition fee, YSO, LSO and LYSO exhibit tough operation only at ten kHz and rapidly degrade (within just a couple of minutes) at twenty kHz. Besides the comparatively very low SC technology threshold (169 nJ), GGG demonstrated outstanding performance characteristics during the small-wave infrared Along with the best pump pulse Electricity of 464 nJ, and that is two moments reduced than in YAG: the biggest red-shifted spectral broadening and the best spectral Electricity density, outperforming KGW and YAG crystals in that aspect.
Its pump laser requires a brief pulse period, a small time jitter, and clean temporal and spatial distributions because of the intrinsic instantaneous procedure. Thus, the OPCPA process is more difficult and pricey.
For tungstates, the ytterbium doping focus can be extremely superior without the need of significant quenching because the changed ions have a really identical ion radius, plus the inter-ion distance is comparatively big.
In the future, we will undertake a laser seed using a broader spectral bandwidth and utilize an acousto-optical programmable dispersive filter to modulate the seed’s spectrum for making entire use on the achieve bandwidth of our regenerative amplifier.
KGW (potassium gadolinium tungstate) is often a crystal that is usually applied for a Raman crystal in Raman spectroscopy. It is just a colorless, transparent crystal which has a more info significant Raman scattering efficiency and a strong Raman spectrum, making it suitable for An array of Raman purposes.
Thermal results are significantly smaller in KGW. This together with the superior harm threshold make the crystal a wonderful prospect for power scaling. Comparing Ba(NO3)2 and KGW for Raman application Ba(NO3)2 are more effective in case of ns pulses and KGW �?in case of ps pulses.
The pink-shifted Portion of the SC spectrum in BGO has the lowest spectral Electrical power density, which is one–two orders of magnitude decrease than in the rest of the components. Nonetheless, extremely reduced Electrical power threshold of SC technology, together with lower optimum pump energy in BGO, should be pointed out. The believed spectral Strength densities created in LSO and LYSO are quite much like YAG throughout the big Portion of the SC spectrum. Probably the most appealing discovering in that regard is GGG crystal, which, Inspite of very moderate blue-shifted spectral broadening, makes the largest spectral crimson-change and the highest spectral Electricity density within the 1600�?000 nm array, which is almost an get of magnitude increased than that produced in YAG.
Even though BGO, GGG, YSO, LSO and LYSO at times function laser hosts37, They may be mostly discovered as productive scintillators, whose scintillation Homes are studied rather well38. Nonetheless, the nonlinear optical properties of those crystals and so their opportunity to function nonlinear components for SC generation specifically, and any other experiments concerning nonlinear propagation of extreme femtosecond laser pulses, keep on being quite poorly analyzed. To this point, GGG, LT23,twenty five and YSO24 were being only sketchily tested for SC era with Ti:sapphire laser pumping, having said that, to the most effective of our know-how, none of the investigated elements ended up examined with Yb-laser pumping, specifically for what issues their effectiveness at very higher (tens to countless kHz) pulse repetition premiums.
The Yb:KGW laser technique features a quasi-3-degree behavior. The online acquire on the Yb:KGW crystal wasn't significant: a number of tens of roundtrips were being needed to amplify the nanojoule seed into a millijoule degree. As a result, the obtain-narrowing influence was inevitable in Yb:KGW regenerative amplifiers.
Figure 8 Intra-cavity pulse amplification procedure monitored by an oscilloscope. The pulse underwent an unsaturated amplification as a result of mirror destruction limitation.
Springer Mother nature remains neutral regarding jurisdictional claims in released maps and institutional affiliations.