Detailed Notes on KYW Crystal
Detailed Notes on KYW Crystal
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The gain bandwidth e.g. of Yb:KGW and Yb:KYW is very substantial as opposed with that of Yb:YAG. This enables for vast wavelength tunability and for Significantly shorter pulse durations from method-locked lasers. Values effectively underneath a hundred fs are already realized with passive manner locking.
The comparison with glasses is appropriate Considering that the big attain bandwidth permits e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
We existing a twin-crystal Yb:KGW laserthat iscapable to operate for a Q-switched oscillator with output ability nearly 24 W and pulse length of 20 ns,or like a regenerative amplifier with output energy up to 21 W and pulse period under two hundred fs following compression of chirped pulses. Equally lasers have superb beam quality with beam parameter M2
FIG. 4. Autocorrelation functionality of the heartbeat 共a兲and spectrum 共b兲of a laser with an oblong Lively ingredient for an output power of 700 mW. The width of
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW as a result of very similar sizes of those chemical elements approximately a hundred% of Yb-doping may be attained. This exceptional characteristic permits ytterbium to take the location of yttrium with virtually no disruption on the crystal’s lattice.
The monoclinic crystal buildings brings about a pure birefringence, assisting to stay away from thermally induced polarization rotation and depolarization reduction.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and they are utilised as lasing components to produce ultrashort (~ 100-200 fs) high power pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes operating at 981 nm supports compact laser techniques.
5 mm other than the middle of your beam caustic. So as to Look at the mode matching simulation, we performed the experiment with Ng-Minimize crystal oscillator, which was designed Earlier As well as in a identical situation with simulation [11]. As shown in Figure three(b) with pink dots and line, the CW output ability is very dependent on the place of laser crystal along with the experimental end result coincides nicely with simulation consequence. Being a Notice, multimode operation transpired in experiment in the event the sizing of your pump beam is bigger than TEM00 cavity method and it will cause bigger CW output electric power in the displacement area below three.five mm.
... at 50 percent-height had been generated within a master oscillator with selfsynchronization of your axial modes, explained within our before post. 21 The new version of your laser, as opposed to that explained within our before article, utilised an Yb:KYW crystal using an N pcut (optical axis N p from the index ellipsoid was parallel into the propagation way of the laser radiation), With all the polarization in the generated radiation directed along the N m axis.
Having said that, at the time Nd3+:YAG grew to become commercially obtainable, the more info desire in CaWO4 dropped sharply. In later on decades, specific other tungstate crystals started to draw in a great deal of notice.
The thermal conductivity of frequent double tungstates is on the buy to 3–4 W/(K m) �?which isn't lousy as opposed with other laser crystals (Though quite a few instances below for YAG), and relatively big in contrast Using the thermal conductivity of typical Eyeglasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) when compared to its counterpart Yb:KGW, is really a impressive product that performs an essential part in laser technological know-how. Its Main perform would be to create ultrashort pulses of light, spanning just a few hundred femtoseconds.
Check with RP Photonics for any suggestions regarding tungstate lasers, such as femtosecond lasers and higher-power lasers.