KYW Crystal - An Overview
KYW Crystal - An Overview
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly significant in contrast with that of Yb:YAG. This enables for huge wavelength tunability and for A great deal shorter pulse durations from manner-locked lasers. Values effectively down below a hundred fs have been achieved with passive method locking.
The comparison with glasses is acceptable For the reason that large acquire bandwidth allows e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
The Yb:KYW crystal’s proficiency in light absorption at all around 981 nm will make the crystal like minded for diode pumping. It truly is further enhanced by its remarkable efficiency in this process, coupled with its reduced quantum defect.
Color-coded reflectivity of a Bragg mirror like a purpose of wavelength and angle of your incident beam.
By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW mainly because of the identical dimensions of those chemical factors nearly one hundred% of Yb-doping might be achieved. This one of a kind characteristic permits ytterbium to go ahead and take position of yttrium with pretty much no disruption into the crystal’s lattice.
Adhesion Test Compliant with MIL-C-675C armed forces criteria, an adhesion exam concerned making use of a tape that fulfills LT-90 specs onto the lens film layer. The tape was affixed completely then taken off vertically. This course of action was executed thrice, causing no blistering or peeling.
PDF Yb:KGW and Yb:KYW crystals have broad emission bandwidths and are used as lasing materials to deliver ultrashort (~ one hundred-200 fs) superior electric power pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser devices.
5 mm apart from the middle with the beam caustic. So as to Check out the mode matching simulation, we executed the experiment with Ng-Slice crystal oscillator, which was designed Formerly As well as in a very same problem with simulation [eleven]. As demonstrated in Determine 3(b) with purple dots and line, the CW output electrical power is highly dependent on the position of laser crystal and the experimental end result coincides nicely with simulation consequence. As being a Observe, multimode operation transpired in experiment if the measurement of your pump beam is greater than TEM00 cavity method and it causes larger CW output electric power during the displacement region beneath 3.5 mm.
For tungstates, the ytterbium doping concentration can be extremely large without the need of sizeable quenching because the replaced ions have a very equivalent ion radius, plus the inter-ion length is relatively massive.
Significant-energy repetitively pulsed ytterbium lasers with supershort pulse width and immediate diode pumping for technological and biomedical purposes
While ytterbium-doped laser gain media typically exhibit a small quantum defect, ytterbium-doped tungstates permit for specifically small values. By way of example, a 1030-nm Yb:YAG laser would Usually be website pumped close to 940 nm, While Yb:KGW or Yb:KYW could possibly be most efficiently pumped about 981 nm.
This tandem of attributes has significantly-reaching implications, especially in the construction of compact nonetheless powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at home temperature had been measured. The emission spectrum and life time with the three File four excited point out ended up determined. Utilizing normal and modified Judd–Ofelt theories, the intensity parameters along with the radiative lifetimes ended up calculated and superior settlement While using the experimental results was obtained for both theories.
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