KGW Crystal Things To Know Before You Buy
KGW Crystal Things To Know Before You Buy
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Concurrently, a shorter laser wavelength may be received; it is achievable to operate using a quantum defect nicely beneath 1%. As a consequence, the heat technology may be so compact that this partly compensates the reduce thermal conductivity.
-switched method. The bandwidth during the orthogonal orientation was clearly A lot broader. The calculated Fourier change restricted pulse duration was as small as sub-160 fs. Under the configuration in which The 2 crystals ended up positioned in the identical orientation, Along with the seed enter, the amplified pulse bandwidth was only 3 nm with 180 μJ Electricity when it broke the dichroic mirrors.
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Eventually, we investigated the very long-expression performances of SC era in crystal samples beneath ideal pumping situations at greater laser repetition rates. In doing this, the crystal samples were not translated and stored in a stationary posture with respect to your pump beam in the full measurement. The illustrations illustrating sturdy long-term performances of SC generation in KGW and YAG crystals at significant laser repetition fees can be uncovered elsewhere. Extra precisely, steady efficiency of KGW crystal at two MHz pulse repetition price less than extremely comparable pump beam concentrating geometry was described recently30, While YAG crystal shown secure performance for numerous hours at 200 kHz pulse repetition price In spite of pretty limited concentrating with the pump beam (NA=0.085)32. The lengthy-time period overall performance assessments in LSO, LYSO and YSO uncovered gradual narrowing on the SC spectra to the long-wavelength side that get more info occurred right after a particular publicity time and could be attributed for the optical degradation of those resources. For illustration, in LSO, the onset of spectral narrowing was noticed following (sim twenty) minutes at a laser repetition price of ten kHz, even though at a laser repetition amount of 20 kHz, steady SC generation performance was noticed just for approximately two min.
]. This technique was based upon The truth that the spectral emission cross-part curves differ from one another when laser polarization is paralleled to the several optical axis of Yb-doped double tungstates[
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A multi-move principal amplifier will additional Strengthen the Electricity to above forty mJ. We will use cryogenically cooled Yb:KGW engineering to restrain the thermal outcome. Two stages of compression is going to be made use of right after amplification. The 1st phase involves a common Treacy-variety compressor, and will compress the heart beat period to down below three hundred fs with an efficiency of around 70%. The next stage requires a fuel-loaded multi-pass cell[
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An example of this kind of conduct is revealed in Fig. 7a. The character of spectral changes is highlighted in Fig. 7d, which displays how the SC spectrum to the extended-wavelength aspect shrinks considerably, from 1800 nm to 1450 nm, just soon after eight minutes of publicity time in a very stationary sample. LT crystal shown considerably greater prolonged-time period performance: at pulse repetition fees of nearly one hundred kHz no narrowing on either side on the SC spectrum was detected. On the other hand, speedy narrowing from the SC spectrum in LT crystal was noticed soon after the very first five minutes of operation when the heart beat repetition rate was established at two hundred kHz (knowledge not shown). In contrast to the above mentioned resources, BGO and GGG demonstrated exceptional SC era performances without any spectral improvements at a pulse repetition fee of two hundred kHz, as attested by the time number of SC spectra in BGO and GGG, revealed in Fig. 7b and c, respectively. Figure 7e and f outline equivalent styles of SC spectra at first and at the conclusion of one hour-lasting measurement in the two elements.