Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, as compared to its counterpart Yb:KGW, is often a remarkable substance that performs a very important role in laser technologies. Its Major perform is always to produce ultrashort pulses of light, spanning just some hundred femtoseconds.
We existing a twin-crystal Yb:KGW laserthat iscapable to operate for a Q-switched oscillator with output ability nearly 24 W and pulse size of twenty ns,or to be a regenerative amplifier with output ability up to 21 W and pulse period under two hundred fs after compression of chirped pulses. Both lasers have great beam excellent with beam parameter M2
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This paper describes a femtosecond laser regenerative amplifier depending on two Yb:KYW crystals with direct longitudinal pumping by powerful linear arrays of semiconductor injection lasers obtaining fiber output. To avoid spectral narrowing in the course of amplification as well as the corresponding lengthening from the amplified pulse when it is compressed, a mix of two Yb:KYW crystals had been used, with the spectral maxima on the amplification shifted relative to each other and with spectral profiling with the amplified radiation.
Right after air drying and subsequent cleansing using a cotton fabric soaked in alcohol, the film area showed no indications of peeling or scratches.
FIG. 1. Optical format of a laser with direct pumping Using the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output
Tungstates are likely to obtain higher Raman coefficients (�?Raman scattering). For that reason, they might generate significant Raman get at average optical intensities. It is achievable to utilize the laser crystal alone being a Raman converter.
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Higher-ability repetitively pulsed ytterbium lasers with supershort pulse width and immediate diode pumping for technological and click here biomedical purposes
Whilst ytterbium-doped laser obtain media normally show a little quantum defect, ytterbium-doped tungstates let for particularly little values. For example, a 1030-nm Yb:YAG laser would normally be pumped around 940 nm, Whilst Yb:KGW or Yb:KYW can be most competently pumped all over 981 nm.
This tandem of characteristics has far-reaching implications, significantly in the construction of compact nevertheless powerfull lasers.
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At the same time, a shorter laser wavelength is usually received; it is possible to work by using a quantum defect very well below one%. As being a consequence, the warmth generation is often so little this partly compensates the reduce thermal conductivity.