The Definitive Guide to KGW Crystal
The Definitive Guide to KGW Crystal
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For that reason There is certainly minimal independence for optimizing the dispersion payment influence. Sub-two hundred fs pulses could be expected that has a broader bandwidth seed input. Due to the twin-crystal configuration, the laser cavity delivers a in the vicinity of diffraction restricted laser beam with M
The monoclinic crystal buildings results in a natural birefringence, assisting to keep away from thermally induced polarization rotation and depolarization decline.
The comparison with glasses is suitable Considering that the substantial get bandwidth enables e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
Sooner or later, We're going to undertake a laser seed with a broader spectral bandwidth and use an acousto-optical programmable dispersive filter to modulate the seed’s spectrum to produce total use on the achieve bandwidth of our regenerative amplifier.
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We approach to boost the heartbeat Strength to above forty mJ in two-phase multi-pass amplifiers, get more info similar to a get aspect of twenty. In Every single amplifier, we may also undertake two cascaded crystals placed underneath orthogonal orientation to reduce the thermal load on Each individual crystal and compensate for that achieve-narrowing impact.
The two-pump laser could provide around one hundred twenty W power. About sixty% of the most pump electric power was utilized within our experiment taking into consideration the very low efficiency on the dichroic mirrors. Underneath this dual-crystal configuration, our cavity supports a one hundred W pump ability input, as discussed in Portion two.two. High-good quality dichroic mirrors will be used in the future, and laser pulses will be stretched to an extended pulse length.
The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The enter on the stretcher (incident angle: 52°) and that on the compressor incident within the grating had been in the identical aspect; as a result, a slight angular tuning from the grating could be designed to get the very best compression consequence. From the compressor, the input angle over the grating and the gap concerning the translation stage (S1) plus the transmission grating (TG) were built to compensate to the stretcher dispersion and all dispersion launched because of the supplies.
-switched laser output under the two crystal placement configurations. The black line denotes the configuration With all the crystals positioned in precisely the same orientation, even though the pink line is underneath the configuration of crystals placed in orthogonal orientation.
Figure eight Intra-cavity pulse amplification approach monitored by an oscilloscope. The pulse underwent an unsaturated amplification due to mirror damage limitation.
Equally energies are marked because of the dashed strains as well as their values are labeled during the plots. The identical options were being also observed in KGW and YAG crystals, whose spectral broadening dynamics are demonstrated for the comparison in Fig. 4.