The Greatest Guide To KGW Crystal

The Greatest Guide To KGW Crystal

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We employed a transmission grating (TG) like a dispersive ingredient in our stretcher and compressor. A compact configuration was adopted, where the stretcher and the compressor shared a single grating much like that in Ref.

In conclusion, we shown that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are efficient nonlinear components for broadband SC generation during the close to-infrared and limited-wave infrared spectral ranges, when pumped by 180 fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO generated two octave-spanning SC spectra, which Examine to SC spectra created in YAG. These supplies show rather very similar performances to YAG also when it comes to threshold and optimal pump pulse energies for SC technology. Even so, for what considerations the possibility to function at substantial laser pulse repetition charge, YSO, LSO and LYSO present resilient operation only at ten kHz and immediately degrade (within a few minutes) at twenty kHz. Apart from the relatively minimal SC generation threshold (169 nJ), GGG shown excellent performance features in the limited-wave infrared Together with the optimum pump pulse Strength of 464 nJ, which happens to be two occasions lower than in YAG: the biggest red-shifted spectral broadening and the very best spectral Electrical power density, outperforming KGW and YAG crystals in that element.

-switched manner. The bandwidth in the orthogonal orientation was clearly A lot broader. The calculated Fourier transform limited pulse length was as small as sub-160 fs. Under the configuration in which the two crystals had been placed in the exact same orientation, with the seed input, the amplified pulse bandwidth was only 3 nm with a hundred and eighty μJ Vitality when it broke the dichroic mirrors.

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Another was put with its Np -axis parallel While using the s-polarized path. A comparison was built concerning a configuration with the crystals positioned in the exact same orientation (

Finally, we investigated the prolonged-term performances of SC generation in crystal samples underneath optimum pumping circumstances at higher laser repetition prices. In doing this, the crystal samples were not translated and stored inside a stationary situation with regard to the pump beam over the complete measurement. The examples illustrating sturdy lengthy-phrase performances of SC generation in KGW and YAG crystals at substantial laser repetition rates may be observed elsewhere. More especially, stable effectiveness of KGW crystal at 2 MHz pulse repetition price below pretty very similar pump beam concentrating geometry was described recently30, Whilst YAG crystal shown secure efficiency for numerous hrs at two hundred kHz pulse repetition charge Despite having pretty tight concentrating of your pump beam (NA=0.085)32. The extensive-expression efficiency tests in LSO, LYSO and YSO discovered gradual narrowing on the SC spectra about the extensive-wavelength side that occurred immediately after a particular publicity time and could be attributed on the optical degradation of such supplies. As an illustration, in LSO, the onset of spectral narrowing was noticed soon after (sim 20) minutes in a laser repetition rate of 10 kHz, though at a laser repetition fee of twenty kHz, secure SC technology general performance was observed just for about 2 min.

Hence, with a further enhancement within our regenerative amplifier, two mJ compressed pulses may be envisioned, without having damaging any component inside our compressor.

We formulated a diode-pumped Yb:KGW regenerative amplifier as being the entrance close with the kilohertz terawatt laser method. Wide bandwidth pulses were received by applying twin crystals with different orientations of their optical axes[

The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The input with the stretcher (incident angle: fifty two°) Which of the compressor incident with the grating were being in the identical side; that's why, a slight angular tuning of your grating might be produced to obtain the best compression final result. In the compressor, the enter angle click here about the grating and the space in between the interpretation stage (S1) plus the transmission grating (TG) were created to compensate for your stretcher dispersion and all dispersion launched with the materials.

A multi-pass main amplifier will further Improve the Electrical power to over forty mJ. We're going to apply cryogenically cooled Yb:KGW technological innovation to restrain the thermal outcome. Two levels of compression might be made use of just after amplification. The initial phase will involve a typical Treacy-kind compressor, and will compress the heart beat period to underneath 300 fs with the efficiency of close to 70%. The 2nd phase will involve a gasoline-stuffed multi-go mobile[

The scattered photons have a special wavelength and Strength compared to incident photons, which results in a Raman spectrum.

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