The smart Trick of KGW Crystal That Nobody is Discussing
The smart Trick of KGW Crystal That Nobody is Discussing
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Down the road, an investigation on the spectral obtain curve of Yb:KGW in the principle amplifier might be performed underneath cryogenic temperature evolution from seventy seven K to 300 K. The Doing work temperature will be managed to comprehend broader gain bandwidth and fewer shift for the central wavelength of the key amplifier.
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are productive nonlinear elements for broadband SC generation during the in close proximity to-infrared and quick-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 produced two octave-spanning SC spectra, which Examine to SC spectra manufactured in YAG. These products show fairly comparable performances to YAG also with regard to threshold and optimal pump pulse energies for SC generation. Nevertheless, for what worries the possibility to function at significant laser pulse repetition level, YSO, LSO and LYSO exhibit resilient operation only at 10 kHz and rapidly degrade (within just a few minutes) at 20 kHz. Apart from the rather minimal SC technology threshold (169 nJ), GGG demonstrated superb effectiveness attributes while in the short-wave infrared Together with the best pump pulse energy of 464 nJ, and that is two times lower than in YAG: the most important crimson-shifted spectral broadening and the best spectral Strength density, outperforming KGW and YAG crystals in that element.
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Sooner or later, We're going to adopt a laser seed having a broader spectral bandwidth and utilize an acousto-optical programmable dispersive filter to modulate the seed’s spectrum to generate entire use in the gain bandwidth of our regenerative amplifier.
The merged obtain is sophisticated and should be calculated less than diverse pumping situations because of the quasi-3-amount method actions with the Yb-doped attain medium. The blueshift, with a person peak from 1037 nm under the same crystal placement orientation to 1035 nm beneath the orthogonal crystal placement orientation, could end result from your reabsorption losses at a protracted wavelength while in the crystal where by the laser polarization is parallel to its Nm -axis, creating the attain at 1035 nm better than that at 1037 nm beneath orthogonal orientation.
Thermal outcomes are drastically lesser in KGW. This along with the significant destruction threshold make the crystal an excellent candidate for ability scaling. Comparing Ba(NO3)two and KGW for Raman application Ba(NO3)2 are more effective in the event of ns pulses and KGW �?in case of ps pulses.
The red-shifted Component of the SC spectrum in BGO has the lowest spectral Power density, that's 1–two orders of magnitude lower than in the rest of the components. However, incredibly low Power threshold of SC generation, in addition to low ideal pump Electrical power in BGO, must be pointed out. The approximated spectral Vitality densities made in LSO and LYSO are very KGW Crystal similar to YAG throughout the significant Portion of the SC spectrum. Probably the most interesting discovering in that regard is GGG crystal, which, Regardless of extremely moderate blue-shifted spectral broadening, provides the biggest spectral purple-shift and the best spectral Power density while in the 1600�?000 nm variety, which is sort of an get of magnitude higher than that made in YAG.
Despite the fact that BGO, GGG, YSO, LSO and LYSO sometimes serve as laser hosts37, These are generally discovered as effective scintillators, whose scintillation properties are studied fairly well38. On the other hand, the nonlinear optical Houses of these crystals and so their prospective to serve as nonlinear resources for SC era especially, and any other experiments about nonlinear propagation of intensive femtosecond laser pulses, continue being extremely improperly researched. So far, GGG, LT23,25 and YSO24 ended up only sketchily examined for SC technology with Ti:sapphire laser pumping, nonetheless, to the best of our expertise, Not one of the investigated resources have been examined with Yb-laser pumping, especially for what concerns their performance at extremely high (tens to numerous kHz) pulse repetition rates.
-switched laser output beneath the two crystal placement configurations. The black line denotes the configuration Using the crystals placed in the same orientation, whilst the crimson line is beneath the configuration of crystals put in orthogonal orientation.
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