Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The achieve bandwidth e.g. of Yb:KGW and Yb:KYW is rather huge in comparison with that of Yb:YAG. This permits for huge wavelength tunability and for A lot shorter pulse durations from manner-locked lasers. Values nicely down below 100 fs are actually obtained with passive mode locking.
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The Yb:KYW crystal’s proficiency in mild absorption at close to 981 nm would make the crystal well matched for diode pumping. It is even more Improved by its impressive effectiveness in this process, coupled with its small quantum defect.
FIG. 4. Autocorrelation functionality of the pulse 共a兲and spectrum 共b兲of the laser with a rectangular Energetic ingredient for an output electricity of seven-hundred mW. The width of
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW due to related sizes of such chemical things approximately one hundred% of Yb-doping could possibly be achieved. This exclusive characteristic permits ytterbium to go ahead and take position of yttrium with nearly no disruption to your crystal’s lattice.
The monoclinic crystal buildings results in a natural birefringence, helping to steer clear of thermally induced polarization rotation and depolarization loss.
PDF Yb:KGW and Yb:KYW crystals have broad emission bandwidths and therefore are used as lasing supplies to generate ultrashort (~ 100-two hundred fs) high power pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser systems.
5 mm apart from the center of your beam caustic. In an effort to check the method matching simulation, we executed the experiment with Ng-Lower crystal oscillator, which was made Formerly As well as in a same ailment with simulation [eleven]. As proven in Figure 3(b) with crimson dots and line, the CW output electricity is very dependent on the place of laser crystal and also the experimental final result coincides nicely with simulation outcome. As being a Observe, multimode Procedure happened in experiment when the sizing with the pump beam is bigger than TEM00 cavity method and it results in better CW output power in the displacement area down below KYW Crystal three.five mm.
For tungstates, the ytterbium doping focus can be quite higher with no significant quenching as the replaced ions have an exceedingly equivalent ion radius, and the inter-ion distance is pretty large.
... Not just the situation of crystal while in the cavity and also the amplification axis of crystal affects the laser operation significantly, since the absorption and emission cross sections from the crystal are rather unique according to the orientation in the crystal.
The thermal conductivity of frequent double tungstates is of your get to three–4 W/(K m) �?which is not terrible compared with other laser crystals (although numerous instances less than for YAG), and fairly big in comparison With all the thermal conductivity of normal Eyeglasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) in comparison to its counterpart Yb:KGW, can be a extraordinary materials that performs an essential role in laser technological innovation. Its Principal purpose is to produce ultrashort pulses of sunshine, spanning just some hundred femtoseconds.
Inquire RP Photonics for virtually any information concerning tungstate lasers, which includes femtosecond lasers and higher-energy lasers.