Fascination About KYW Crystal
Fascination About KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared to its counterpart Yb:KGW, is a exceptional content that plays a vital position in laser know-how. Its Principal operate would be to produce ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
The Yb:KYW crystal’s proficiency in mild absorption at about 981 nm would make the crystal well matched for diode pumping. It's more Improved by its amazing performance in this method, coupled with its very low quantum defect.
Shade-coded reflectivity of the Bragg mirror for a functionality of wavelength and angle from the incident beam.
This paper describes a femtosecond laser regenerative amplifier according to two Yb:KYW crystals with immediate longitudinal pumping by impressive linear arrays of semiconductor injection lasers acquiring fiber output. To prevent spectral narrowing during amplification and the corresponding lengthening from the amplified pulse when it is actually compressed, a mix of two Yb:KYW crystals had been employed, Using the spectral maxima of your amplification shifted relative to each other and with spectral profiling of your amplified radiation.
In advance of the event of Nd:YAG, Nd3+:CaWO4 was a very important rare-earth-doped laser achieve medium. It was the truth is Employed in the very first continually functioning crystal laser.
FIG. 1. Optical structure of a laser with immediate pumping Along with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
five mm in addition to the middle on the click here beam caustic. To be able to check the manner matching simulation, we done the experiment with Ng-Lower crystal oscillator, which was created Beforehand As well as in a exact issue with simulation [eleven]. As shown in Determine three(b) with crimson dots and line, the CW output power is extremely depending on the placement of laser crystal and the experimental consequence coincides well with simulation end result. Like a Take note, multimode operation transpired in experiment in the event the size in the pump beam is larger than TEM00 cavity mode and it brings about bigger CW output energy while in the displacement location down below three.five mm.
... at fifty percent-height were being produced within a master oscillator with selfsynchronization of your axial modes, explained in our before write-up. 21 The new version with the laser, not like that described inside our earlier post, used an Yb:KYW crystal by having an N pcut (optical axis N p from the index ellipsoid was parallel into the propagation route of your laser radiation), Together with the polarization of the produced radiation directed together the N m axis.
By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW due to the identical measurements of these chemical features as many as 100% of Yb-doping could be realized.
Whilst ytterbium-doped laser obtain media normally exhibit a small quantum defect, ytterbium-doped tungstates permit for specifically tiny values. By way of example, a 1030-nm Yb:YAG laser would Generally be pumped all around 940 nm, whereas Yb:KGW or Yb:KYW might be most efficiently pumped all-around 981 nm.
This tandem of attributes has far-reaching implications, notably in the development of compact however powerfull lasers.
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