KYW Crystal - An Overview

KYW Crystal - An Overview

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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 Key purpose is to crank out ultrashort pulses of sunshine, spanning just some hundred femtoseconds.

The Yb:KYW crystal’s proficiency in gentle absorption at around 981 nm helps make the crystal well matched for diode pumping. It is more Improved by its impressive effectiveness in this method, coupled with its lower quantum defect.

FIG. four. Autocorrelation functionality of the heart beat 共a兲and spectrum 共b兲of the laser with an oblong Energetic element for an output ability of 700 mW. The width of

This paper describes a femtosecond laser regenerative amplifier depending on two Yb:KYW crystals with direct longitudinal pumping by powerful linear arrays of semiconductor injection lasers owning fiber output. To circumvent spectral narrowing all through amplification plus the corresponding lengthening on the amplified pulse when it really is compressed, a mix of two Yb:KYW crystals have been used, While using the spectral maxima on the amplification shifted relative to one another and with spectral profiling in the amplified radiation.

Before the development of Nd:YAG, Nd3+:CaWO4 was an important scarce-earth-doped laser obtain medium. It had been in actual fact used in the initial repeatedly functioning crystal laser.

FIG. one. Optical layout of a laser with immediate pumping With all the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output

Tungstates tend to get substantial Raman coefficients (�?Raman scattering). Thus, they might deliver significant Raman gain at average optical intensities. It is achievable to make use of the laser crystal by itself as being a Raman converter.

For tungstates, the ytterbium doping concentration can be very substantial with no major quenching since the changed ions have a really comparable ion radius, as well as the inter-ion length is relatively large.

By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW a result of the comparable measurements of these chemical aspects up to one hundred% of Yb-doping could check here be reached.

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