An Unbiased View of KYW Crystal
An Unbiased View of KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared to its counterpart Yb:KGW, is a extraordinary product that plays a very important function in laser know-how. Its Principal purpose should be to produce ultrashort pulses of light, spanning only a few hundred femtoseconds.
The Yb:KYW crystal’s proficiency in mild absorption at all-around 981 nm can make the crystal well suited for diode pumping. It is actually more Increased by its impressive efficiency in this method, coupled with its minimal quantum defect.
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This paper describes a femtosecond laser regenerative amplifier according to two Yb:KYW crystals with direct longitudinal pumping by powerful linear arrays of semiconductor injection lasers having fiber output. To circumvent spectral narrowing all through amplification and also the corresponding lengthening in the amplified pulse when it's compressed, a mix of two Yb:KYW crystals have been utilized, with the spectral maxima with the amplification shifted relative to each other and with spectral profiling with the amplified radiation.
Prior to the event of Nd:YAG, Nd3+:CaWO4 was a vital unusual-earth-doped laser attain medium. It was the truth is Employed in the very first continually operating crystal laser.
FIG. one. Optical structure of a laser with direct pumping Using the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output
five mm other than the center from the beam caustic. To be able to Look at the method matching simulation, we carried out the experiment with Ng-Reduce crystal oscillator, which was made Beforehand and in a exact affliction with simulation [11]. As revealed in Figure three(b) with crimson dots and line, the CW output power is very dependent on the situation of laser crystal as well as the experimental consequence coincides nicely with simulation final result. For a Be aware, multimode Procedure happened in experiment if the size on the pump beam is larger than TEM00 cavity mode and it brings about higher CW output electrical power from the displacement location below 3.5 mm.
For tungstates, the ytterbium doping concentration can be quite higher devoid of substantial quenching since the changed ions have a really very similar ion radius, and the inter-ion distance is comparatively substantial.
However, when Nd3+:YAG grew to check here become commercially available, the curiosity in CaWO4 dropped sharply. In later on yrs, certain other tungstate crystals started to draw in many attention.
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