Rumored Buzz on KYW Crystal
Rumored Buzz on KYW Crystal
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In simple terms, the Yb:KYW crystal has found its market in significant-power laser apps on account of its power to create high Electricity ultrashort laser pulses while keeping a compact dimensions. The interaction of its features �?seamless ytterbium substitution, powerful absorption properties, ultrashort pulse technology and performance in Vitality conversion �?positions the Yb:KYW crystal being a cornerstone within the laser technology, covering assorted fields starting from scientific investigate to industrial apps.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, as compared to its counterpart Yb:KGW, is a remarkable materials that plays a vital position in laser engineering. Its Main function is to crank out ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
We existing a twin-crystal Yb:KGW laserthat iscapable to function like a Q-switched oscillator with output electrical power nearly 24 W and pulse size of 20 ns,or being a regenerative amplifier with output electricity as many as 21 W and pulse period down below 200 fs immediately after compression of chirped pulses. Both equally lasers have outstanding beam excellent with beam parameter M2
Colour-coded reflectivity of the Bragg mirror for a perform of wavelength and angle of your incident beam.
By substituting yttrium with ytterbium within the crystal lattice of Yb:KYW as a result of equivalent sizes of such chemical components approximately one hundred% of Yb-doping can be attained. This unique characteristic permits ytterbium to go ahead and take place of yttrium with almost no disruption into the crystal’s lattice.
The monoclinic crystal buildings brings about a purely natural birefringence, helping to keep away from thermally induced polarization rotation and depolarization reduction.
FIG. one. Optical format of a laser with direct pumping Together with the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output
Tungstates tend to obtain significant Raman coefficients (�?Raman scattering). Consequently, they could crank out significant Raman gain at moderate optical intensities. It is achievable to utilize the laser crystal itself like a Raman converter.
... at half-height had been produced inside of a grasp oscillator with selfsynchronization of your axial modes, described inside our before short article. 21 The new version on the laser, compared with that explained within our before article, used an Yb:KYW crystal using an N pcut (optical axis N p of your index ellipsoid was parallel for the propagation route of your laser radiation), With all the polarization with the created radiation directed alongside the N m axis.
... Not simply the place of crystal during the cavity but will also the amplification axis of crystal impacts the laser operation tremendously, as the absorption and emission cross sections of the crystal are really different according to the orientation in the crystal.
Though ytterbium-doped laser attain media usually show a small quantum defect, click here ytterbium-doped tungstates let for notably modest values. For example, a 1030-nm Yb:YAG laser would Commonly be pumped all-around 940 nm, whereas Yb:KGW or Yb:KYW can be most effectively pumped all-around 981 nm.
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Simultaneously, a shorter laser wavelength might be acquired; it can be done to operate which has a quantum defect perfectly under 1%. As a consequence, the warmth era could be so little this partly compensates the reduce thermal conductivity.