The smart Trick of KYW Crystal That Nobody is Discussing
The smart Trick of KYW Crystal That Nobody is Discussing
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The comparison with glasses is appropriate Because the large gain bandwidth will allow e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
The Yb:KYW crystal’s proficiency in light-weight absorption at all over 981 nm makes the crystal like minded for diode pumping. It is even more Improved by its amazing performance in this method, coupled with its low 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 impressive linear arrays of semiconductor injection lasers acquiring fiber output. To avoid spectral narrowing for the duration of amplification along with the corresponding lengthening with the amplified pulse when it truly is compressed, a mix of two Yb:KYW crystals have been used, with the spectral maxima on the amplification shifted relative to each other and with spectral profiling in the amplified radiation.
Before the event of Nd:YAG, Nd3+:CaWO4 was a very important uncommon-earth-doped laser attain medium. It was the truth is Employed in the very first continually functioning crystal laser.
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Tungstates are inclined to obtain superior Raman coefficients (�?Raman scattering). Therefore, they're able to create important Raman acquire at average optical intensities. It is possible to make use of the laser crystal alone for a Raman converter.
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By substituting yttrium with ytterbium while in the crystal lattice of Yb:KYW a result of the equivalent sizes of such chemical aspects around a hundred% of Yb-doping may very well be reached.
The thermal conductivity of frequent double tungstates is of the buy to 3–4 W/(K m) �?which isn't undesirable as opposed with other laser crystals (although quite a few situations a lot less than for YAG), and rather significant when compared Together with the thermal conductivity of normal glasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) compared to its counterpart Yb:KGW, is really a outstanding materials that plays an essential role in laser engineering. Its Major perform is always to generate ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
Concurrently, a shorter laser wavelength might be acquired; it is possible to work by using a quantum defect nicely below 1%. As being a consequence, the warmth generation is usually so modest this partly compensates the decrease check here thermal conductivity.