The best Side of KGW Crystal
The best Side of KGW Crystal
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Prior get the job done showed that the dual-crystal configuration can be used to compensate for your thermal lensing influence[
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We applied a transmission grating (TG) being a dispersive ingredient inside our stretcher and compressor. A compact configuration was adopted, where the stretcher as well as compressor shared just one grating similar to that in Ref.
The very first two peaks may very well be related to luminescence of pure material59, whilst the remaining peaks may be attributed to the luminescence of unidentified dopants, Even though the supplier specified the sample as undoped. The luminescence of YAG crystal makes potent UV luminescence by using a greatest depth at three hundred nm, that is attributed to put together self-trapped exciton and antisite defect-connected emissions60. Finally, no luminescence inside the UV, visible and around-IR was noticed in KGW and LT crystals, a minimum of inside the detection number of fiber spectrometer (two hundred�?00 nm).
Replacement on the Computer system for an even better 1 or perhaps a wonderful adjustment with the Computer system orientation along with the used superior voltage is needed to prevent this phenomenon. A quick pulse picker may be used to Increase the nanosecond-scale distinction of your output key pulse.
The measured Minimize-off wavelengths with the shorter-wavelength facet are consistent with the general pattern of blue-shifted spectral broadening within the bandgap of nonlinear substance. All the nonlinear resources produced fair purple-shifted spectral broadenings below ailments of ideal pump pulse energies, with the largest crimson-shift exceeding 2000 nm calculated in GGG crystal. Our outcomes exposed that GGG and BGO (which also had the bottom supercontinuum technology threshold) offer you tough, optical injury-totally free efficiency at a laser repetition rate of two hundred kHz, suggesting that these products are excellent possibilities to YAG and KGW for very low threshold, significant normal power supercontinuum technology in the near- and small-wave infrared spectral ranges. We also demonstrated that scintillating Houses of bulk supplies could be readily researched in the filamentation routine, by using multiphoton excitation working with in close proximity to-infrared femtosecond laser pulses.
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Lastly, we investigated the long-expression performances of SC technology in crystal samples below best pumping problems at higher laser repetition premiums. In doing check here so, the crystal samples weren't translated and kept inside a stationary posture with respect to your pump beam throughout the full measurement. The illustrations illustrating sturdy very long-expression performances of SC generation in KGW and YAG crystals at substantial laser repetition fees can be uncovered in other places. Extra exclusively, secure general performance of KGW crystal at 2 MHz pulse repetition charge beneath pretty equivalent pump beam focusing geometry was claimed recently30, Whilst YAG crystal demonstrated stable effectiveness for a number of hours at two hundred kHz pulse repetition rate In spite of incredibly tight concentrating from the pump beam (NA=0.085)32. The extensive-phrase overall performance assessments in LSO, LYSO and YSO revealed gradual narrowing of your SC spectra within the long-wavelength aspect that happened soon after a specific publicity time and will be attributed into the optical degradation of these supplies. By way of example, in LSO, the onset of spectral narrowing was noticed following (sim twenty) minutes in a laser repetition rate of 10 kHz, when in a laser repetition amount of twenty kHz, steady SC generation general performance was noticed just for roughly two min.
So, with a further improvement within our regenerative amplifier, two mJ compressed pulses may be predicted, with out harming any part within our compressor.
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-switched laser output under the two crystal placement configurations. The black line denotes the configuration Along with the crystals put in the exact same orientation, when the crimson line is underneath the configuration of crystals put in orthogonal orientation.
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]. The twin-crystal configuration lowers the thermal load on Just about every crystal while protecting a large attain, and facilitates the payment of every one’s thermal lensing result. Hence, the laser cavity can operate with a large balance assortment in excess of the thermal lensing impact variation.