The Ultimate Guide To KGW Crystal
The Ultimate Guide To KGW Crystal
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The thermal conductivity of prevalent double tungstates is from the get to 3–4 W/(K m) �?which isn't undesirable when compared with other laser crystals (although numerous times below for YAG), and quite massive as opposed Along with the thermal conductivity of typical glasses.
In the future, an investigation around the spectral attain curve of Yb:KGW in the key amplifier are going to be carried out underneath cryogenic temperature evolution from seventy seven K to three hundred K. The Operating temperature will be managed to realize broader get bandwidth and fewer change within the central wavelength of the key amplifier.
At the same time, a shorter laser wavelength might be acquired; it is achievable to function which has a quantum defect well down below 1%. To be a consequence, the warmth era is often so modest that this partly compensates the lessen thermal conductivity.
], but it could increase a great deal more Value to this ingredient. The intra-cavity spectral acquire curve could possibly be modulated by inserting an etalon that cuts down the particular get in the wavelength with the utmost achieve element[
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Down the road, We're going to adopt a laser seed with a broader spectral bandwidth and implement an acousto-optical programmable dispersive filter to modulate the seed’s spectrum to create full use in the obtain bandwidth of our regenerative amplifier.
The combined attain is complicated and will be measured less than distinctive pumping disorders due to quasi-a few-level procedure actions with the Yb-doped gain medium. The blueshift, with just one peak from 1037 nm underneath the exact same crystal placement orientation to 1035 nm under the orthogonal crystal placement orientation, could consequence through the reabsorption losses at an extended wavelength from the crystal where by the laser polarization is parallel to its Nm -axis, creating the achieve at 1035 nm bigger than that at 1037 nm under orthogonal orientation.
]. This process was based upon the fact that the spectral emission cross-part curves differ from one another when laser polarization is paralleled to different optical axis of Yb-doped double tungstates[
The two-pump more info laser could offer you around a hundred and twenty W power. Around sixty% of the utmost pump electricity was utilized in our experiment thinking about the minimal overall performance from the dichroic mirrors. Under this twin-crystal configuration, our cavity supports a a hundred W pump power enter, as discussed in Portion 2.two. Higher-high quality dichroic mirrors will likely be utilised Down the road, and laser pulses will probably be stretched to a longer pulse length.
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-switched output spectrum in the regenerative amplifier supports a sub-one hundred sixty fs pulse amplification. Thus, pulses with energies of as many as two mJ and duration below 200 fs is often attained utilizing increased-high quality dichroic mirrors along with a broader-spectrum laser seed. This regenerative amplifier functions as a superb pre-amplifier for even further laser amplification.
Figure eight Intra-cavity pulse amplification process monitored by an oscilloscope. The heartbeat underwent an unsaturated amplification as a result of mirror damage limitation.
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