Getting My KYW Crystal To Work
Getting My KYW Crystal To Work
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared with its counterpart Yb:KGW, is usually a remarkable material that performs a very important job in laser technologies. Its Major perform is always to produce ultrashort pulses of light, spanning just some hundred femtoseconds.
The Yb:KYW crystal’s proficiency in gentle absorption at all over 981 nm helps make the crystal well matched for diode pumping. It's even more Increased by its outstanding performance in this method, coupled with its very 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 potent linear arrays of semiconductor injection lasers acquiring fiber output. To stop spectral narrowing during amplification along with the corresponding lengthening of the amplified pulse when it truly is compressed, a mix of two Yb:KYW crystals had been applied, Using the spectral maxima on the amplification shifted relative to one another and with spectral profiling on the amplified radiation.
In advance of the event of Nd:YAG, Nd3+:CaWO4 was an important unusual-earth-doped laser attain medium. It was in reality Utilized in the primary continuously working crystal laser.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and they are utilised as lasing supplies to deliver ultrashort (~ one hundred-two hundred fs) large power pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser methods.
Tungstates are inclined to own substantial Raman coefficients (�?Raman scattering). Hence, they might make major Raman gain at average optical intensities. It is achievable to make use of the laser crystal itself as being a Raman converter.
For tungstates, the ytterbium doping concentration can be extremely higher with no major quenching since the changed ions have an exceptionally identical more info ion radius, and also the inter-ion distance is comparatively massive.
By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW as a result of equivalent sizes of such chemical factors nearly one hundred% of Yb-doping might be obtained.
The thermal conductivity of popular double tungstates is in the purchase to 3–four W/(K m) �?which is not terrible in contrast with other laser crystals (although various instances fewer than for YAG), and relatively huge as opposed Together with the thermal conductivity of usual glasses.
Li2WO4-WO3 flux was properly applied lowering The expansion temperature underneath 900 oC. Based on solitary crystal x-ray measurements, the crystal corresponds for the P2/n Room team.
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Concurrently, a shorter laser wavelength might be obtained; it can be done to function with a quantum defect very well beneath one%. Like a consequence, the warmth generation is often so tiny this partly compensates the reduce thermal conductivity.