The smart Trick of KYW Crystal That No One is Discussing
The smart Trick of KYW Crystal That No One is Discussing
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is extremely massive when compared with that of Yb:YAG. This permits for vast wavelength tunability and for A great deal shorter pulse durations from manner-locked lasers. Values effectively underneath a hundred fs happen to be obtained with passive manner locking.
This one of a kind characteristic of ultrafast pulses enables nonlinear optical conversation with tissue at reduced General publicity, and drives apps like deep-tissue multiphoton microscopy and superior-precision eye surgical procedure
Femtosecond laser based on Yb:KYW crystals with suppression of spectral narrowing inside of a regenerative amplifier by spectral profiling of the heartbeat
FIG. four. Autocorrelation perform of the heartbeat 共a兲and spectrum 共b兲of the laser with a rectangular active element for an output ability of seven hundred mW. The width of
This paper describes a femtosecond laser regenerative amplifier depending on two Yb:KYW crystals with immediate longitudinal pumping by potent linear arrays of semiconductor injection lasers owning fiber output. To circumvent spectral narrowing throughout amplification plus the corresponding lengthening of your amplified pulse when it's compressed, a combination of two Yb:KYW crystals have been utilized, Along with the spectral maxima in the amplification shifted relative to one another and with spectral profiling in the amplified radiation.
The monoclinic crystal buildings results in a normal birefringence, assisting to steer clear of thermally induced polarization rotation and depolarization decline.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and therefore are utilised as lasing components to generate ultrashort (~ 100-two hundred fs) substantial energy pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes working at 981 nm supports compact laser methods.
5 mm aside from the middle on the beam caustic. In an effort to Verify the method matching simulation, we executed the experiment with Ng-Lower crystal oscillator, which was produced Earlier and in a exact same problem with simulation [eleven]. As proven in Determine 3(b) with pink dots and line, the CW output electric power is very depending on the posture of laser crystal and also the experimental outcome coincides well with simulation outcome. Being a note, multimode Procedure occurred in experiment if the dimensions of the pump beam is much larger than TEM00 cavity manner and it triggers better CW output electricity while in the displacement area underneath three.5 mm.
... at fifty percent-height were being generated within a master oscillator with selfsynchronization on the axial modes, described within our before write-up. 21 The new edition from the laser, compared with that described inside our before posting, utilised an Yb:KYW crystal having an N pcut (optical axis N p in the index ellipsoid was parallel for the propagation course from the laser radiation), Along with the polarization of your produced radiation directed along the N m axis.
... Not simply the posture of crystal while in the cavity but will also the amplification axis of crystal has an effect on the laser Procedure significantly, as the absorption and emission cross sections with the crystal are very distinct based on the orientation of your crystal.
When ytterbium-doped laser get media commonly exhibit a little quantum defect, ytterbium-doped tungstates let for especially tiny values. Such as, a 1030-nm Yb:YAG laser would Ordinarily be pumped all-around 940 nm, While Yb:KGW or Yb:KYW may very well be most successfully pumped all around 981 nm.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) in comparison to its counterpart Yb:KGW, can be a amazing materials that plays a vital role in laser technology. Its Major operate is usually to deliver ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
Simultaneously, a shorter laser wavelength is often obtained; it is possible to operate which has a quantum defect here well down below one%. As a consequence, the heat era might be so little this partly compensates the lessen thermal conductivity.