The smart Trick of KGW Crystal That Nobody is Discussing
The smart Trick of KGW Crystal That Nobody is Discussing
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Later on, an investigation around the spectral attain curve of Yb:KGW in the principle amplifier is going to be performed less than cryogenic temperature evolution from 77 K to 300 K. The Functioning temperature will likely be controlled to comprehend broader acquire bandwidth and less shift within the central wavelength of the leading amplifier.
Figure 7 exhibits the calculated dispersion compensation consequence. The compressed pulse duration is all over 185 fs in the event the duration of input pulses is one hundred fifty fs. The discrepancy amongst them are going to be considerably minimized with an extended pulse input because uncompensated higher-get dispersion issues a lot less for lengthier pulses. This configuration was utilized to display the compressibility of our amplified pulses in the preliminary phase of our full process. Sooner or later we might adopt a grating-pair compressor for fantastic payment for prime-buy dispersion.
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For tungstates, the ytterbium doping concentration can be very superior devoid of major quenching because the replaced ions have a really similar ion radius, along with the inter-ion length is relatively big.
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Lastly, we investigated the long-term performances of SC generation in crystal samples less than best pumping problems at higher laser repetition premiums. In doing so, the crystal samples were not translated and stored inside a stationary place with respect to your pump beam during the entire measurement. The illustrations illustrating robust very long-time period performances of SC technology in KGW and YAG crystals at large laser repetition costs could be found elsewhere. Additional precisely, stable overall performance of KGW crystal at 2 MHz pulse repetition price underneath very equivalent pump beam focusing geometry was noted recently30, Whilst YAG crystal shown secure overall performance for many several hours at two hundred kHz pulse repetition level In spite of really restricted concentrating with the pump beam (NA=0.085)32. The extended-term effectiveness assessments in LSO, LYSO and YSO discovered gradual narrowing on the SC spectra about the long-wavelength side that transpired soon after a certain exposure time and could be attributed for the optical degradation of these materials. As an illustration, in LSO, the onset of spectral narrowing was observed after (sim 20) minutes in a laser repetition level of ten kHz, whilst in a laser repetition amount of twenty kHz, secure SC generation efficiency was noticed just for approximately two min.
]. This method was dependant on the fact that the spectral emission cross-area curves vary from each other when laser polarization is paralleled to the different optical axis of Yb-doped double tungstates[
The red-shifted Component of the SC spectrum in BGO has the bottom spectral Electricity density, which is one–2 orders of magnitude reduce than in the remainder of the supplies. On the other hand, extremely minimal Electricity threshold of SC generation, along with small ideal pump Vitality in BGO, needs to be identified. The approximated spectral Electrical power densities generated in LSO and LYSO are fairly similar to YAG all over the big Section of the SC spectrum. Essentially the get more info most fascinating getting in that regard is GGG crystal, which, In spite of extremely average blue-shifted spectral broadening, generates the largest spectral pink-change and the highest spectral Power density within the 1600�?000 nm vary, which is nearly an order of magnitude greater than that created in YAG.
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KGW has a solid Raman spectrum that extends from the ultraviolet on the in the vicinity of infrared, rendering it practical for An array of applications. The crystal can be used for a reference product for Raman spectroscopy, in addition to a sample for researching Raman scattering while in the sound condition.
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The two energies are marked with the dashed traces as well as their values are labeled within the plots. The similar functions had been also noticed in KGW and YAG crystals, whose spectral broadening dynamics are demonstrated for any comparison in Fig. four.