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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, as compared to its counterpart Yb:KGW, is often a outstanding substance that performs a crucial position in laser technology. Its Main operate should be to generate ultrashort pulses of sunshine, spanning just some hundred femtoseconds.
We current a twin-crystal Yb:KGW laserthat iscapable to function like a Q-switched oscillator with output power around 24 W and pulse length of twenty ns,or as being a regenerative amplifier with output ability approximately 21 W and pulse period under 200 fs right after compression of chirped pulses. Both equally lasers have fantastic beam quality with beam parameter M2
FIG. 4. Autocorrelation functionality of the heartbeat 共a兲and spectrum 共b兲of the laser with a rectangular Lively ingredient for an output electricity of 700 mW. The width of
By substituting yttrium with ytterbium while in the crystal lattice of Yb:KYW mainly because of the very similar dimensions of such chemical things approximately a hundred% of Yb-doping could possibly be obtained. This distinctive characteristic permits ytterbium to take the position of yttrium with pretty much no disruption for the crystal’s lattice.
Adhesion Examination Compliant with MIL-C-675C army specifications, an adhesion examination involved implementing a tape that meets LT-ninety specifications onto the lens film layer. The tape was affixed fully after which you can eliminated vertically. This method was done 3 times, resulting in no blistering or peeling.
FIG. one. Optical format of a laser with direct pumping Using the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
A superior brightnessQ-switched oscillator and regenerative amplifier based on a dual-crystal Yb:KGW laser
For tungstates, the ytterbium doping concentration can be very superior devoid of important quenching because the changed ions have an exceptionally equivalent ion radius, and also the inter-ion length is relatively big.
By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW due to similar sizes of such chemical things approximately one hundred% of Yb-doping might be obtained.
While ytterbium-doped laser attain media frequently show a small quantum defect, ytterbium-doped tungstates allow for for significantly modest values. As an example, a 1030-nm Yb:YAG laser would Generally be pumped around 940 nm, Whilst Yb:KGW or Yb:KYW can be most successfully pumped all around 981 nm.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at room temperature had been calculated. The emission spectrum and life time from the 3 File 4 psyched condition were decided. Making use of common and modified Judd–Ofelt theories, the depth parameters and the radiative lifetimes get more info ended up calculated and good settlement Using the experimental outcomes was attained for both theories.
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