Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, compared to its counterpart Yb:KGW, can be a amazing content that plays a very important part in laser engineering. Its Major operate should be to deliver ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
time. Crystals in the compound melts congruently at 1007 oC, however soften crystallization of top quality crystal is impossible as a result of period transition at ~920 oC. The best seeded Alternative process from
FIG. 4. Autocorrelation perform of the heartbeat 共a兲and spectrum 共b兲of the laser with an oblong Energetic factor for an output electric power of 700 mW. The width of
This paper describes a femtosecond laser regenerative amplifier depending on two Yb:KYW crystals with direct longitudinal pumping by strong linear arrays of semiconductor injection lasers owning fiber output. To circumvent spectral narrowing for the duration of amplification and also the corresponding lengthening on the amplified pulse when it's compressed, a mix of two Yb:KYW crystals ended up used, Using the spectral maxima from the amplification shifted relative to each other and with spectral profiling of your amplified radiation.
Adhesion Check Compliant with MIL-C-675C army standards, an adhesion exam included applying a tape that satisfies LT-ninety technical specs on to the lens movie layer. The tape was affixed completely and afterwards eradicated vertically. This procedure was performed 3 times, causing no blistering or peeling.
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five mm in addition to the middle on the beam caustic. So as to Verify the manner matching simulation, we done the experiment with Ng-Reduce crystal oscillator, which was formulated Beforehand As well as in a exact ailment with simulation [eleven]. As revealed in Figure three(b) with red dots and line, the CW output electric power is very depending on the situation of laser crystal plus the experimental consequence coincides nicely with simulation result. Being a Notice, multimode Procedure happened in experiment once the size from the pump beam is greater than TEM00 cavity mode and it brings about bigger CW output electric power within the displacement location below three.five mm.
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By substituting yttrium with ytterbium within the crystal lattice of Yb:KYW a result of the identical dimensions of these chemical factors approximately one hundred% of Yb-doping may be reached.
Even though ytterbium-doped laser get media usually exhibit a little quantum defect, ytterbium-doped tungstates more info make it possible for for particularly small values. As an example, a 1030-nm Yb:YAG laser would Generally be pumped all over 940 nm, While Yb:KGW or Yb:KYW could be most competently pumped about 981 nm.
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