KYW Crystal Secrets
KYW Crystal Secrets
Blog Article
In realistic conditions, the Yb:KYW crystal has found its market in higher-energy laser purposes due to its ability to deliver high Electrical power ultrashort laser pulses although protecting a compact dimensions. The interplay of its attributes �?seamless ytterbium substitution, robust absorption features, ultrashort pulse era and effectiveness in Vitality conversion �?positions the Yb:KYW crystal for a cornerstone in the laser technological know-how, masking varied fields ranging from scientific exploration to industrial applications.
The comparison with Eyeglasses is suitable Because the large attain bandwidth will allow e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
time. Crystals of the compound melts congruently at 1007 oC, having said that soften crystallization of high quality crystal is unachievable resulting from stage changeover at ~920 oC. The highest seeded solution system from
Colour-coded reflectivity of the Bragg mirror for a functionality of wavelength and angle of the incident beam.
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with direct longitudinal pumping by potent linear arrays of semiconductor injection lasers getting fiber output. To prevent spectral narrowing during amplification as well as corresponding lengthening with the amplified pulse when it's compressed, a combination of two Yb:KYW crystals ended up made use of, with the spectral maxima of the amplification shifted relative to each other and with spectral profiling of the amplified radiation.
The monoclinic crystal constructions brings about a purely natural birefringence, helping to avoid thermally induced polarization rotation and depolarization reduction.
FIG. 1. Optical structure of the laser with direct pumping Along with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
five mm aside from the middle on the beam caustic. So as to Check out the manner matching simulation, we carried out the experiment with Ng-cut crystal oscillator, which was designed previously and in a exact situation with simulation [eleven]. As revealed in Figure 3(b) with purple dots and line, the CW output power is highly dependent on the situation of laser crystal and also the experimental end result coincides very well with simulation end result. To be a note, multimode operation occurred in experiment once the measurement on the pump beam is larger sized than TEM00 cavity manner and it causes higher CW output energy within the displacement region below three.five mm.
... at 50 %-height were being produced in a grasp oscillator with selfsynchronization of the axial modes, described inside our earlier short article. 21 The new version on the laser, in contrast to that described inside our before write-up, made use of an Yb:KYW crystal with the N pcut (optical axis N p of your index ellipsoid was parallel towards the propagation course of your laser radiation), With all the polarization from the produced radiation directed alongside the N m axis.
By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW mainly because of the related sizes of those chemical features approximately a hundred% of Yb-doping could possibly be achieved.
The thermal conductivity of prevalent double tungstates is of the purchase to three–four W/(K m) �?which is not undesirable as opposed with other laser crystals (Though several instances a lot less than for YAG), and fairly huge in comparison Along with the thermal conductivity of usual Eyeglasses.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at space temperature have been measured. The emission spectrum and life time on the 3 F 4 psyched condition have been established. Making use of regular and modified Judd–Ofelt theories, the intensity parameters as well as radiative lifetimes were being calculated and superior agreement Along with the experimental final results was obtained for both theories.
Simultaneously, a shorter laser wavelength may be attained; it is achievable to operate which has a quantum defect properly below one%. As being a consequence, the warmth generation might be so small that this partly compensates the decrease thermal conductivity.