The attain bandwidth e.g. of Yb:KGW and Yb:KYW is quite significant in comparison with that of Yb:YAG. This permits for large wavelength tunability and for much shorter pulse durations from mode-locked lasers. Values properly under one hundred fs are actually accomplished with passive manner locking.

The comparison with Eyeglasses is suitable Considering that the substantial gain bandwidth will allow e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.

The Yb:KYW crystal’s proficiency in light-weight absorption at close to 981 nm tends to make the crystal well suited for diode pumping. It can be even more enhanced by its impressive efficiency in this process, coupled with its lower quantum defect.

Coloration-coded reflectivity of the Bragg mirror as a perform of wavelength and angle on the incident beam.

Optical structure of the laser with direct pumping with the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output with the radiation, WP can be a half-wave plate, CL is a collimating lens, FL is a concentrating lens, AE is undoubtedly an active ingredient created from an Yb:KYW crystal, DM is really a spherical dichroic mirror, M1-M6 tend to be the cavity mirrors, OC is definitely the output mirror, and SAM is actually a semiconductor saturable-absorber mirror.

The monoclinic crystal constructions ends in a organic birefringence, assisting to stay away from thermally induced polarization rotation and depolarization decline.

PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and so are used as lasing products to crank out ultrashort (~ 100-200 fs) significant electricity pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser units.

5 mm aside from the middle get more info of the beam caustic. So that you can Check out the method matching simulation, we executed the experiment with Ng-Lower crystal oscillator, which was developed previously As well as in a exact affliction with simulation [eleven]. As revealed in Figure three(b) with crimson dots and line, the CW output power is very depending on the place of laser crystal along with the experimental end result coincides effectively with simulation consequence. Being a note, multimode Procedure happened in experiment if the dimension from the pump beam is greater than TEM00 cavity mode and it results in bigger CW output electricity during the displacement area below three.five mm.

For tungstates, the ytterbium doping concentration can be extremely higher devoid of important quenching as the replaced ions have an exceedingly equivalent ion radius, plus the inter-ion distance is relatively substantial.

By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW mainly because of the very similar dimensions of these chemical aspects up to 100% of Yb-doping may be reached.

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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) when compared with its counterpart Yb:KGW, is a exceptional content that performs a very important role in laser technological innovation. Its Key functionality is to generate ultrashort pulses of sunshine, spanning just some hundred femtoseconds.

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