The Definitive Guide to KYW Crystal
The Definitive Guide to KYW Crystal
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The acquire bandwidth e.g. of Yb:KGW and Yb:KYW is rather huge compared with that of Yb:YAG. This enables for large wavelength tunability and for A great deal shorter pulse durations from mode-locked lasers. Values effectively underneath a hundred fs are actually achieved with passive mode locking.
This exclusive attribute of ultrafast pulses enables nonlinear optical interaction with tissue at small General publicity, and drives purposes including deep-tissue multiphoton microscopy and substantial-precision eye surgical procedure
time. Crystals in the compound melts congruently at 1007 oC, even so melt crystallization of high quality crystal is impossible due to section transition at ~920 oC. The top seeded Resolution approach from
The absorption and emission spectra of Yb:KYW Crystals Show solid peaks at 980 nm and 1030 nm, respectively, making sure efficient Power conversion and large general performance in laser units.
Ultrafast lasers, with pulse widths of a few picoseconds (ten−twelve s) or considerably less, permit time resolution necessary in laser-thrilled fluorescence lifetime spectroscopy and imaging procedures.Also, they supply large pulse peak powers at higher repetition costs and reasonable average output powers.
The monoclinic crystal constructions leads to a pure birefringence, assisting to keep away from thermally induced polarization rotation and depolarization reduction.
PDF Yb:KGW and Yb:KYW crystals have broad emission bandwidths and they are applied as lasing elements to create ultrashort (~ 100-two hundred fs) higher power pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes operating at 981 nm supports compact laser units.
5 mm apart from the middle with the beam caustic. So as to Look at the method matching simulation, we done the experiment with Ng-Slash crystal oscillator, which was developed previously and in a exact same affliction with simulation [eleven]. As demonstrated in Determine three(b) with pink dots and line, the CW output energy is extremely dependent on the situation of laser crystal plus the experimental consequence coincides perfectly with simulation outcome. As being a Observe, multimode Procedure occurred in experiment in the event the dimensions from the pump beam is bigger than TEM00 cavity mode and it brings about larger CW output electrical power from the displacement area underneath 3.5 mm.
... at 50 %-peak were being produced in a very learn website oscillator with selfsynchronization with the axial modes, explained inside our previously post. 21 The new version in the laser, as opposed to that explained in our earlier short article, utilized an Yb:KYW crystal with an N pcut (optical axis N p on the index ellipsoid was parallel towards the propagation course from the laser radiation), While using the polarization on the created radiation directed along the N m axis.
... Not only the place of crystal inside the cavity but in addition the amplification axis of crystal influences the laser operation tremendously, because the absorption and emission cross sections from the crystal are fairly various according to the orientation of your crystal.
The thermal conductivity of popular double tungstates is in the get to three–4 W/(K m) �?which isn't negative compared with other laser crystals (Whilst many times a lot less than for YAG), and pretty significant in contrast While using the thermal conductivity of standard Eyeglasses.
This tandem of characteristics has much-reaching implications, significantly in the construction of compact nevertheless powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at space temperature ended up calculated. The emission spectrum and lifetime in the three File four thrilled condition ended up identified. Utilizing common and modified Judd–Ofelt theories, the depth parameters as well as radiative lifetimes were calculated and great agreement With all the experimental benefits was received for equally theories.
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