An Unbiased View of KYW Crystal
An Unbiased View of KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, as compared to its counterpart Yb:KGW, is often a extraordinary content that plays a vital role in laser engineering. Its Key functionality would be to crank out ultrashort pulses of light, spanning just some hundred femtoseconds.
time. Crystals in the compound melts congruently at 1007 oC, however soften crystallization of top of the range crystal is unattainable as a consequence of phase changeover at ~920 oC. The very best seeded Resolution process from
Coloration-coded reflectivity of a Bragg mirror like a function of wavelength and angle in the incident beam.
This paper describes a femtosecond laser regenerative amplifier based upon two Yb:KYW crystals with immediate longitudinal pumping by strong linear arrays of semiconductor injection lasers acquiring fiber output. To circumvent spectral narrowing during amplification and the corresponding lengthening on the amplified pulse when it truly is compressed, a combination of two Yb:KYW crystals had been used, Along with the spectral maxima on the amplification shifted relative to each other and with spectral profiling on the amplified radiation.
Ahead of the event of Nd:YAG, Nd3+:CaWO4 was an important uncommon-earth-doped laser obtain medium. It absolutely was actually used in the very first continually functioning crystal laser.
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five mm in addition to the middle from the beam caustic. So as to check the mode matching simulation, we done the experiment with Ng-Lower crystal oscillator, which was developed Formerly and in a very same ailment with simulation [11]. As proven in Determine three(b) with purple dots and line, the CW output electric power is very dependent on the placement of laser crystal as well as the experimental outcome coincides nicely with simulation final result. To be a Notice, multimode operation transpired in experiment if the dimension from the pump beam is more substantial than TEM00 cavity mode and it results in increased CW output electrical power while in the displacement region under 3.five mm.
For tungstates, the ytterbium doping concentration can be very high without sizeable quenching since the changed ions have an incredibly equivalent ion radius, and the inter-ion length is pretty large.
By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW due to similar sizes of these chemical things as much as a hundred% of Yb-doping might be accomplished.
While ytterbium-doped laser gain media normally show a little quantum defect, ytterbium-doped tungstates allow for notably smaller values. For example, a 1030-nm Yb:YAG laser would Usually be pumped all over 940 nm, While Yb:KGW or Yb:KYW might be most effectively pumped close to 981 nm.
This tandem of characteristics has considerably-achieving implications, notably in the construction of compact however powerfull lasers.
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Check with RP Photonics for just about any assistance relating to tungstate lasers, which include femtosecond lasers and large-electric power lasers.