The Single Best Strategy To Use For KYW Crystal
The Single Best Strategy To Use For KYW Crystal
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The comparison with glasses is suitable Considering that the huge achieve bandwidth allows e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
We present a twin-crystal Yb:KGW laserthat iscapable to work to be a Q-switched oscillator with output power around 24 W and pulse duration of 20 ns,or for a regenerative amplifier with output electric power as much as 21 W and pulse duration down below two hundred fs immediately after compression of chirped pulses. Both equally lasers have superb beam good quality with beam parameter M2
The absorption and emission spectra of Yb:KYW Crystals Exhibit sturdy peaks at 980 nm and 1030 nm, respectively, making certain effective Electricity conversion and superior efficiency in laser units.
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with immediate longitudinal pumping by effective linear arrays of semiconductor injection lasers possessing fiber output. To stop spectral narrowing in the course of amplification and also the corresponding lengthening of the amplified pulse when it is actually compressed, a mix of two Yb:KYW crystals had been made use of, Along with the spectral maxima in the amplification shifted relative to one another and with spectral profiling on the amplified radiation.
The monoclinic crystal buildings brings about a purely natural birefringence, assisting to stay clear of thermally induced polarization rotation and depolarization decline.
FIG. one. Optical layout of the laser with direct pumping With all the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
Tungstates are inclined to possess significant Raman coefficients (�?Raman scattering). As a result, they can produce sizeable Raman acquire at reasonable optical intensities. It is achievable to make use of the laser crystal by itself for a Raman converter.
... at half-height were created in a grasp oscillator with click here selfsynchronization with the axial modes, explained within our earlier short article. 21 The new edition with the laser, contrary to that described in our before article, made use of an Yb:KYW crystal with an N pcut (optical axis N p in the index ellipsoid was parallel to the propagation way with the laser radiation), Along with the polarization on the generated radiation directed together the N m axis.
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW mainly because of the related dimensions of such chemical aspects nearly a hundred% of Yb-doping may be realized.
While ytterbium-doped laser achieve media frequently exhibit a small quantum defect, ytterbium-doped tungstates make it possible for for particularly modest values. Such as, a 1030-nm Yb:YAG laser would Typically be pumped all over 940 nm, Whilst Yb:KGW or Yb:KYW can be most successfully pumped close to 981 nm.
Li2WO4-WO3 flux was properly applied cutting down the growth temperature underneath 900 oC. In accordance with solitary crystal x-ray measurements, the crystal corresponds to the P2/n Room group.
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At the same time, a shorter laser wavelength may be obtained; it is possible to work that has a quantum defect properly under 1%. To be a consequence, the warmth generation is usually so smaller that this partly compensates the lessen thermal conductivity.