Facts About KYW Crystal Revealed
Facts About KYW Crystal Revealed
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The Yb:KYW crystal’s proficiency in light-weight absorption at around 981 nm tends to make the crystal like minded for diode pumping. It is additional Improved by its exceptional efficiency in this method, coupled with its small quantum defect.
The absorption and emission spectra of Yb:KYW Crystals Show robust peaks at 980 nm and 1030 nm, respectively, making sure effective Electricity conversion and higher effectiveness in laser programs.
This paper describes a femtosecond laser regenerative amplifier depending on two Yb:KYW crystals with immediate longitudinal pumping by powerful linear arrays of semiconductor injection lasers getting fiber output. To circumvent spectral narrowing throughout amplification along with the corresponding lengthening of your amplified pulse when it is compressed, a combination of two Yb:KYW crystals had been made use of, with the spectral maxima of your amplification shifted relative to each other and with spectral profiling on the amplified radiation.
The monoclinic crystal constructions leads to a organic birefringence, assisting to avoid thermally induced polarization rotation and depolarization reduction.
FIG. one. Optical structure of the laser with direct pumping While using the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
Tungstates tend to acquire higher Raman coefficients (�?Raman scattering). Therefore, they will crank out significant Raman acquire at reasonable optical intensities. It is achievable to make use of the laser crystal alone as a Raman converter.
... at 50 %-top have been created inside of a learn oscillator with selfsynchronization from the axial modes, described within our previously write-up. 21 The new edition of your laser, in contrast to that explained in our earlier post, made use of an Yb:KYW crystal having an N pcut (optical axis N p of the index ellipsoid was parallel to the propagation direction of your laser radiation), With all the polarization with the produced radiation directed along the N m axis.
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW due to very similar sizes of these chemical features approximately 100% of Yb-doping can be obtained.
Although ytterbium-doped laser achieve media frequently show a little quantum defect, ytterbium-doped tungstates allow for for particularly small values. By way of example, a 1030-nm Yb:YAG laser would normally be pumped around 940 nm, Whilst Yb:KGW or Yb:KYW may be most proficiently pumped about 981 nm.
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