Little Known Facts About KGW Crystal.
Little Known Facts About KGW Crystal.
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The achieve bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly huge in comparison with that of Yb:YAG. This permits for wide wavelength tunability and for Significantly shorter pulse durations from method-locked lasers. Values perfectly beneath one hundred fs have been realized with passive mode locking.
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are productive nonlinear products for broadband SC era while in the close to-infrared and shorter-wave infrared spectral ranges, when pumped by 180 fs elementary harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO created two octave-spanning SC spectra, which Assess to SC spectra made in YAG. These supplies show very very similar performances to YAG also when it comes to threshold and optimal pump pulse energies for SC era. However, for what issues the possibility to operate at high laser pulse repetition rate, YSO, LSO and LYSO demonstrate tough Procedure only at ten kHz and immediately degrade (in a couple of minutes) at twenty kHz. Moreover the comparatively low SC era threshold (169 nJ), GGG demonstrated wonderful overall performance qualities from the shorter-wave infrared While using the optimum pump pulse Strength of 464 nJ, that's two situations reduced than in YAG: the most important red-shifted spectral broadening and the very best spectral Electricity density, outperforming KGW and YAG crystals in that part.
], but it will insert considerably more Price tag to this component. The intra-cavity spectral achieve curve could possibly be modulated by inserting an etalon that lowers the actual achieve for the wavelength with the most achieve component[
Before the event of Nd:YAG, Nd3+:CaWO4 was an important rare-earth-doped laser gain medium. It absolutely was the truth is Utilized in the very first constantly working crystal laser.
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The blended achieve is complicated and may be calculated beneath distinct pumping situations due to quasi-a few-degree system actions from the Yb-doped acquire medium. The blueshift, with a person peak from 1037 nm underneath the same crystal placement orientation to 1035 nm under the orthogonal crystal placement orientation, could end result within the reabsorption losses at an extended wavelength within the crystal the place the laser polarization is parallel to its Nm -axis, building the gain at 1035 nm greater than that at 1037 nm underneath orthogonal orientation.
Hence, with an additional enhancement within our regenerative amplifier, 2 mJ compressed pulses could be expected, without having harmful any component within our compressor.
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The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The enter from the stretcher (incident angle: 52°) Which of the compressor incident with the grating were being from your identical facet; consequently, a slight angular tuning with the grating may be made to obtain the ideal compression final result. Inside the compressor, the enter angle over the grating and the space involving the interpretation stage (S1) and also the transmission grating (TG) had been made to compensate for the stretcher dispersion and all dispersion released because of the resources.
-switched output spectrum of check here your regenerative amplifier supports a sub-one hundred sixty fs pulse amplification. Hence, pulses with energies of as many as 2 mJ and length below 200 fs might be attained employing higher-good quality dichroic mirrors and a broader-spectrum laser seed. This regenerative amplifier performs as a good pre-amplifier for even further laser amplification.
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