KYW Crystal Options
KYW Crystal Options
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison with its counterpart Yb:KGW, is often a extraordinary material that plays an essential part in laser technological innovation. Its Principal purpose is usually to make ultrashort pulses of light, spanning just a few hundred femtoseconds.
Femtosecond laser determined by Yb:KYW crystals with suppression of spectral narrowing inside of a regenerative amplifier by spectral profiling of the pulse
FIG. four. Autocorrelation function of the pulse 共a兲and spectrum 共b兲of a laser with a rectangular Energetic element for an output power of seven hundred mW. The width of
This paper describes a femtosecond laser regenerative amplifier according to two Yb:KYW crystals with immediate longitudinal pumping by strong linear arrays of semiconductor injection lasers getting fiber output. To circumvent spectral narrowing through amplification as well as the corresponding lengthening of your amplified pulse when it really 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.
After air drying and subsequent cleaning using a cotton cloth soaked in Alcoholic beverages, the film surface area showed no signs of peeling or scratches.
FIG. 1. Optical structure of a laser with immediate pumping While using the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output
Tungstates have a tendency to acquire higher Raman coefficients (�?Raman scattering). For that reason, they might create important Raman get at average optical intensities. It is achievable to make use of the laser crystal by itself like a Raman converter.
For tungstates, the ytterbium doping focus can be very significant without the need of sizeable quenching as the replaced ions have an exceedingly related ion radius, plus the inter-ion distance is pretty massive.
By substituting yttrium with ytterbium while in the crystal lattice click here of Yb:KYW as a result of similar measurements of such chemical factors up to one hundred% of Yb-doping could be reached.
Even though ytterbium-doped laser get media frequently show a little quantum defect, ytterbium-doped tungstates make it possible for for particularly little values. By way of example, a 1030-nm Yb:YAG laser would Generally be pumped all around 940 nm, While Yb:KGW or Yb:KYW could possibly be most proficiently pumped about 981 nm.
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At the same time, a shorter laser wavelength can be received; it is feasible to work that has a quantum defect properly down below 1%. As being a consequence, the warmth generation is usually so modest that this partly compensates the decreased thermal conductivity.