The Definitive Guide to KGW Crystal
The Definitive Guide to KGW Crystal
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Even though ytterbium-doped laser achieve media generally exhibit a small quantum defect, ytterbium-doped tungstates permit for specifically tiny values. One example is, a 1030-nm Yb:YAG laser would Commonly be pumped close to 940 nm, While Yb:KGW or Yb:KYW could possibly be most effectively pumped around 981 nm.
We employed a transmission grating (TG) to be a dispersive element within our stretcher and compressor. A compact configuration was adopted, where the stretcher as well as the compressor shared 1 grating much like that in Ref.
Figure seven exhibits the calculated dispersion payment outcome. The compressed pulse length is around 185 fs once the length of enter pulses is 150 fs. The discrepancy involving them will be appreciably reduced with an extended pulse enter simply because uncompensated substantial-purchase dispersion matters a lot less for for a longer period pulses. This configuration was utilized to clearly show the compressibility of our amplified pulses on the preliminary stage of our entire program. Later on we would adopt a grating-pair compressor for good compensation for high-get dispersion.
The datasets employed and/or analysed for the duration of The present examine obtainable in the corresponding writer on reasonable request.
For tungstates, the ytterbium doping focus can be quite substantial with no important quenching as the changed ions have an exceptionally similar ion radius, as well as the inter-ion distance is pretty massive.
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The combined obtain is sophisticated and should be calculated under unique pumping conditions due to the quasi-three-degree technique habits from the Yb-doped gain medium. The blueshift, with one peak from 1037 nm beneath the similar crystal placement orientation to 1035 nm beneath the orthogonal crystal placement orientation, could final result from the reabsorption losses at a lengthy wavelength while in the crystal where the laser polarization is parallel to its Nm -axis, generating the acquire at 1035 nm better than that at 1037 nm below orthogonal orientation.
We program to boost the pulse Vitality to previously mentioned 40 mJ in two-stage multi-pass amplifiers, equivalent to a get aspect of twenty. In Just about every amplifier, we can even undertake two cascaded crystals positioned underneath orthogonal orientation to decrease the thermal load on Every single crystal and compensate for that get-narrowing influence.
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KGW has a robust Raman spectrum that extends within the ultraviolet for the near infrared, making it valuable for A selection of purposes. The crystal can be used being a reference substance for Raman spectroscopy, in addition to a sample for learning Raman scattering during the good state.
Figure eight Intra-cavity pulse amplification approach monitored by an oscilloscope. The pulse underwent an unsaturated amplification because of the mirror harm limitation.
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