The Ultimate Guide To KYW Crystal
The Ultimate Guide To KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared to its counterpart Yb:KGW, is a impressive substance that performs a very important role in laser technologies. Its Major operate is always to create ultrashort pulses of light, spanning only a few hundred femtoseconds.
The Yb:KYW crystal’s proficiency in gentle absorption at all over 981 nm would make the crystal well suited for diode pumping. It really is even more Increased by its outstanding effectiveness in this process, coupled with its minimal quantum defect.
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This paper describes a femtosecond laser regenerative amplifier based on two Yb:KYW crystals with immediate longitudinal pumping by potent linear arrays of semiconductor injection lasers owning fiber output. To avoid spectral narrowing in the course of amplification and the corresponding lengthening on the amplified pulse when it is compressed, a combination of two Yb:KYW crystals were being employed, While using the spectral maxima in the amplification shifted relative to one another and with spectral profiling of your amplified radiation.
In advance of the event of Nd:YAG, Nd3+:CaWO4 was a vital scarce-earth-doped laser gain medium. It was actually used in the initial repeatedly functioning crystal laser.
FIG. 1. Optical structure of a laser with immediate pumping Using the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output
Tungstates are likely to have higher Raman coefficients (�?Raman scattering). As a result, they could make important Raman get at reasonable optical intensities. It is achievable to make use of the laser crystal itself as a Raman converter.
For tungstates, the ytterbium doping concentration can be quite superior without having sizeable quenching since the changed ions have an extremely very similar ion radius, and the inter-ion distance is comparatively substantial.
By substituting yttrium with ytterbium while in the crystal lattice of Yb:KYW mainly because of the very similar sizes of these chemical aspects up to one hundred% of Yb-doping may be accomplished.
The thermal conductivity of popular double tungstates is on the get to 3–four W/(K m) �?which is not terrible in contrast with other laser crystals (Whilst numerous situations below for YAG), and reasonably large in comparison While using the thermal conductivity of standard glasses.
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