Fascination About KYW Crystal
Fascination About KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison with its counterpart Yb:KGW, is often a remarkable substance that performs a significant job in laser technology. Its Main perform would be to make ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
We existing a twin-crystal Yb:KGW laserthat iscapable to work to be a Q-switched oscillator with output energy around 24 W and pulse size of 20 ns,or like a regenerative amplifier with output electrical power up to 21 W and pulse period underneath two hundred fs immediately after compression of chirped pulses. Both equally lasers have exceptional beam good quality with beam parameter M2
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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 having fiber output. To stop spectral narrowing in the course of amplification as well as the corresponding lengthening in the amplified pulse when it's compressed, a mix of two Yb:KYW crystals were being applied, Together with the spectral maxima of your amplification shifted relative to one another and with spectral profiling in the amplified radiation.
In advance of the development of Nd:YAG, Nd3+:CaWO4 was an important scarce-earth-doped laser obtain medium. It had been the truth is Employed in the very first repeatedly functioning crystal laser.
FIG. one. Optical structure of a laser with direct pumping While using the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
Tungstates have a tendency to acquire substantial Raman coefficients (�?Raman scattering). Hence, they could crank out sizeable Raman attain at average optical intensities. It is feasible to use the laser crystal itself as being a Raman converter.
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By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW mainly because of the related sizes of those chemical elements as many as 100% of Yb-doping may be realized.
The thermal conductivity of widespread double tungstates is of the buy to three–4 W/(K m) �?which is not undesirable compared with other laser crystals (While several moments fewer than for YAG), and relatively substantial as opposed with the thermal conductivity of common Eyeglasses.
Li2WO4-WO3 flux was properly applied lowering The expansion temperature under 900 oC. As outlined by one crystal x-ray measurements, the crystal corresponds towards the P2/n Area group.
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