Getting My KGW Crystal To Work
Getting My KGW Crystal To Work
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]. A result of the brief storage time, Ti:sapphire is often pumped by frequency-doubled Nd:YAG or Nd:glass stable-point out lasers, which leads to a cumbersome and complicated method with substantial Price. In comparison with conventional CPA laser methods, the OPCPA program can get hold of a shorter pulse length and a greater peak energy.
Even though ytterbium-doped laser acquire media commonly exhibit a little quantum defect, ytterbium-doped tungstates permit for especially compact values. By way of example, a 1030-nm Yb:YAG laser would Generally be pumped about 940 nm, Whilst Yb:KGW or Yb:KYW might be most successfully pumped all around 981 nm.
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Thus There is certainly very little liberty for optimizing the dispersion payment outcome. Sub-two hundred fs pulses could be expected which has a broader bandwidth seed input. Thanks to the twin-crystal configuration, the laser cavity delivers a close to diffraction constrained laser beam with M
The monoclinic crystal structures results in a purely natural birefringence, helping to steer clear of thermally induced polarization rotation and depolarization loss.
For tungstates, the ytterbium doping concentration can be extremely significant with no substantial quenching since the replaced ions have an exceptionally comparable ion radius, plus the inter-ion length is relatively big.
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Thermal effects are drastically smaller sized in KGW. This along with the higher destruction threshold make the crystal an excellent prospect for energy scaling. Comparing Ba(NO3)two and KGW for Raman application Ba(NO3)2 are simpler in case of ns pulses and KGW �?in the event of ps pulses.
The 2-pump laser could offer you up to a hundred and twenty W electrical power. Close to 60% of the most pump electricity was used in our experiment thinking about the small functionality of your dichroic mirrors. Less than this dual-crystal configuration, read more our cavity supports a one hundred W pump electrical power enter, as mentioned in Portion two.two. Large-good quality dichroic mirrors are going to be utilized Later on, and laser pulses will probably be stretched to an extended pulse length.
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-switched output spectrum of the regenerative amplifier supports a sub-a hundred and sixty fs pulse amplification. For that reason, pulses with energies of nearly two mJ and period down below two hundred fs may be acquired employing better-excellent dichroic mirrors in addition to a broader-spectrum laser seed. This regenerative amplifier is effective as a fantastic pre-amplifier for even more laser amplification.
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Both energies are marked with the dashed strains and their values are labeled inside the plots. The equivalent attributes were also noticed in KGW and YAG crystals, whose spectral broadening dynamics are shown to get a comparison in Fig. four.