Top KYW Crystal Secrets
Top KYW Crystal Secrets
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In sensible terms, the Yb:KYW crystal has uncovered its market in higher-electricity laser apps due to its power to deliver substantial energy ultrashort laser pulses though protecting a compact size. The interaction of its features �?seamless ytterbium substitution, potent absorption attributes, ultrashort pulse era and efficiency in Vitality conversion �?positions the Yb:KYW crystal for a cornerstone within the laser technology, masking assorted fields ranging from scientific investigation to industrial programs.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared to its counterpart Yb:KGW, is actually a remarkable material that plays a crucial job in laser technology. Its Most important function is usually to create ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
The Yb:KYW crystal’s proficiency in light absorption at all around 981 nm can make the crystal well suited for diode pumping. It can be more enhanced by its remarkable effectiveness in this process, coupled with its minimal quantum defect.
FIG. four. Autocorrelation perform of the heartbeat 共a兲and spectrum 共b兲of a laser with a rectangular Energetic aspect for an output ability of seven-hundred mW. The width of
Optical format of a laser with immediate pumping Together with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output from the radiation, WP is usually a 50 percent-wave plate, CL is really a collimating lens, FL is usually a focusing lens, AE can be an Energetic component made out of an Yb:KYW crystal, DM is really a spherical dichroic mirror, M1-M6 are definitely the cavity mirrors, OC is definitely the output mirror, and SAM is usually a semiconductor saturable-absorber mirror.
The monoclinic crystal structures results in a all-natural birefringence, helping to steer clear of thermally induced polarization rotation and depolarization decline.
FIG. 1. Optical structure of the laser with direct pumping While using the radiation of semiconductor injection lasers. LD is undoubtedly an IPG Photonics laser diode with fiber output
5 mm aside from the center with the beam caustic. In an effort to Test the mode matching simulation, we executed the experiment with Ng-Lower crystal oscillator, which was created previously As well as in a very same affliction with simulation [11]. As demonstrated in Figure three(b) with pink dots and line, the CW output electricity is very dependent on the posture of laser crystal as well as the experimental consequence coincides nicely with simulation end result. To be a Observe, multimode operation occurred in experiment when the size from the pump beam is more substantial than TEM00 cavity method and it triggers greater CW output electrical power from the displacement region beneath three.five mm.
... at 50 %-height were being generated in a learn oscillator with selfsynchronization of the axial modes, described within our earlier post. 21 The new version from the laser, as opposed to that described in our previously short article, made use of an Yb:KYW crystal having an N pcut (optical axis N p of your index ellipsoid was parallel to your propagation course with the laser radiation), Along with the polarization of your created radiation directed alongside the N m axis.
Even so, the moment Nd3+:YAG became commercially offered, the interest in CaWO4 dropped sharply. In later on years, sure other tungstate crystals began to entice lots of attention.
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Li2WO4-WO3 flux was correctly applied lowering The expansion temperature down below 900 oC. In accordance with solitary crystal x-ray measurements, the crystal corresponds into the P2/n space group.
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