New Step by Step Map For KYW Crystal
New Step by Step Map For KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, compared to its counterpart Yb:KGW, is really a remarkable material that performs a significant job in laser technological know-how. Its Most important operate will be to deliver ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
We present a dual-crystal Yb:KGW laserthat iscapable to function to be a Q-switched oscillator with output ability nearly 24 W and pulse duration of twenty ns,or for a regenerative amplifier with output electric power as many as 21 W and pulse length under 200 fs following compression of chirped pulses. The two lasers have superb beam quality with beam parameter M2
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This paper describes a femtosecond laser regenerative amplifier dependant on two Yb:KYW crystals with immediate longitudinal pumping by highly effective linear arrays of semiconductor injection lasers acquiring fiber output. To avoid spectral narrowing throughout amplification and the corresponding lengthening of the amplified pulse when it is actually compressed, a mix of two Yb:KYW crystals had been utilized, with the spectral maxima of your amplification shifted relative to each other and with spectral profiling of the amplified radiation.
Ahead of the event of Nd:YAG, Nd3+:CaWO4 was a very important unusual-earth-doped laser attain medium. It was the truth is Employed in the very first continually running crystal laser.
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Spatial framework with the beam plus the corresponding depth profiles I for the output on the laser.
For tungstates, the ytterbium doping focus can be very substantial without important quenching as the replaced ions have an incredibly identical ion radius, as well as the inter-ion length is fairly large.
By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW due to comparable sizes of such chemical aspects around a hundred% of Yb-doping may very well be reached.
When ytterbium-doped laser attain media generally exhibit a small quantum defect, ytterbium-doped tungstates permit for notably modest values. One example is, a 1030-nm Yb:YAG laser would Ordinarily be pumped all-around 940 nm, Whilst Yb:KGW or Yb:KYW can be most competently pumped all over 981 nm.
This tandem of characteristics has much-reaching implications, significantly in the construction of compact nevertheless powerfull lasers.
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At the same time, a shorter laser wavelength could be acquired; it can be done to work by using a quantum here defect properly underneath 1%. As a consequence, the warmth era is often so smaller this partly compensates the lessen thermal conductivity.