The Single Best Strategy To Use For KGW Crystal
The Single Best Strategy To Use For KGW Crystal
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Down the road, an investigation within the spectral get curve of Yb:KGW in the most crucial amplifier will probably be carried out beneath cryogenic temperature evolution from seventy seven K to 300 K. The Doing work temperature is going to be controlled to comprehend broader get bandwidth and fewer change with the central wavelength of the principle amplifier.
Determine 7 reveals the calculated dispersion payment result. The compressed pulse length is around 185 fs once the period of input pulses is a hundred and fifty fs. The discrepancy among them will be drastically reduced with a longer pulse enter simply because uncompensated higher-order dispersion matters a lot less for extended pulses. This configuration was utilized to display the compressibility of our amplified pulses on the preliminary stage of our complete technique. Sooner or later we'd undertake a grating-pair compressor for great compensation for high-get dispersion.
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Amplified pulses with the Strength higher than 2.5 mJ is often anticipated by applying a better pump electric power to the regenerative amplifier and making it function on the saturation degree. The laser fluence of ~1 J/cm2 around the dichroic mirrors is believed to become beneath the destruction threshold of superior-quality dielectric-coated mirrors.
A number of methods are already adopted to resolve this problem. An acousto-optical programmable dispersive filter is often utilized to modulate the seed’s spectrum to read more suppress the attain-narrowing effect[
The black line denotes the configuration Together with the crystals placed in the same orientation, even though the red line is beneath the configuration of crystals put in orthogonal orientation.
The spectral measurements of filament-induced luminescence counsel that scintillating Qualities of materials may be readily researched using femtosecond close to-infrared gentle resource by way of multiphoton excitation while in the filamentation routine, which enables effortless separation of excitation and emission wavelengths and small possibility of optical injury.
The edge Strength for SC generation (hbox E _ textrm th ) was described given that the pump pulse energy, where the blue-shifted spectral broadening swiftly settles to a particular Lower-off wavelength that remains Nearly continuous In spite of additional increase of your pump pulse Electrical power. The ideal Strength (hbox E _textrm opt ), was described as being the pump pulse Vitality, which produces the largest red-shifted spectral broadening prior to the onset of periodic modulation within the SC spectrum due to filament refocusing.
Whilst BGO, GGG, YSO, LSO and LYSO occasionally serve as laser hosts37, they are largely discovered as effective scintillators, whose scintillation Attributes are studied very well38. Nevertheless, the nonlinear optical Houses of such crystals and so their likely to function nonlinear supplies for SC era specifically, and another experiments about nonlinear propagation of intense femtosecond laser pulses, stay really inadequately examined. To this point, GGG, LT23,25 and YSO24 have been only sketchily examined for SC era with Ti:sapphire laser pumping, nonetheless, to the top of our expertise, none of the investigated supplies were examined with Yb-laser pumping, specifically for what fears their general performance at really large (tens to a huge selection of kHz) pulse repetition rates.
The Yb:KGW laser system features a quasi-three-degree behavior. The online get with the Yb:KGW crystal was not higher: a number of tens of roundtrips were being needed to amplify the nanojoule seed to a millijoule degree. Thus, the obtain-narrowing influence was inescapable in Yb:KGW regenerative amplifiers.
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