Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, compared to its counterpart Yb:KGW, is a impressive substance that plays an important function in laser technology. Its Principal functionality is always to deliver ultrashort pulses of sunshine, spanning just some hundred femtoseconds.
Femtosecond laser according to Yb:KYW crystals with suppression of spectral narrowing in the regenerative amplifier by spectral profiling of the pulse
FIG. 4. Autocorrelation functionality of the heart beat 共a兲and spectrum 共b兲of the laser with a rectangular Energetic component for an output ability of 700 mW. The width of
This paper describes a femtosecond laser regenerative amplifier based upon two Yb:KYW crystals with immediate longitudinal pumping by strong linear arrays of semiconductor injection lasers possessing fiber output. To stop spectral narrowing throughout amplification and the corresponding lengthening of your amplified pulse when it can be compressed, a combination of two Yb:KYW crystals were being utilised, With all the spectral maxima in the amplification shifted relative to one another and with spectral profiling of your amplified radiation.
Immediately after air drying and subsequent cleaning which has a cotton cloth soaked in Alcoholic beverages, the film area showed no indications of peeling or scratches.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and so are employed as lasing components to produce ultrashort (~ a hundred-200 fs) high ability pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes operating at 981 nm supports compact laser devices.
five mm other than the middle in the beam caustic. So as to Test the manner matching simulation, we performed the experiment with Ng-Lower crystal oscillator, which was developed previously As well as in a identical affliction with simulation [eleven]. As proven in Determine three(b) with pink dots and line, the CW output electricity is highly dependent on the place of laser crystal along with the experimental result coincides well with simulation result. To be a note, multimode Procedure happened in experiment in the event the sizing on the pump beam is greater than TEM00 cavity method and it causes bigger CW output ability while in the displacement location underneath three.five mm.
... at fifty percent-height were created within a master oscillator with selfsynchronization of your axial modes, explained in our before report. 21 The new version with the laser, not like that described within our earlier article, applied an Yb:KYW crystal with the N pcut (optical axis N p of the index ellipsoid was parallel on the propagation direction on the laser radiation), Using the polarization on the created radiation directed along the N m axis.
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW mainly because of the very similar measurements of such chemical things around 100% of Yb-doping may very well be attained.
The thermal conductivity of common double tungstates is with the order to three–4 W/(K m) �?which isn't negative as opposed with other laser crystals (Despite the fact that several moments less than for YAG), and reasonably significant in contrast Along with the thermal conductivity of common glasses.
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At the same time, a shorter laser wavelength is usually received; it is possible to work with a quantum defect very well beneath one%. Like a consequence, the warmth generation is often so tiny this partly compensates the reduce thermal conductivity.