The KYW Crystal Diaries
The KYW Crystal Diaries
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We current a twin-crystal Yb:KGW laserthat iscapable to work to be a Q-switched oscillator with output energy up to 24 W and pulse length of 20 ns,or as being a regenerative amplifier with output electrical power as many as 21 W and pulse length underneath 200 fs right after compression of chirped pulses. Each lasers have superb beam quality with beam parameter M2
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This paper describes a femtosecond laser regenerative amplifier dependant on two Yb:KYW crystals with immediate longitudinal pumping by impressive linear arrays of semiconductor injection lasers owning fiber output. To circumvent spectral narrowing during amplification and the corresponding lengthening of the amplified pulse when it truly is compressed, a combination of two Yb:KYW crystals were being utilised, With all the spectral maxima of the amplification shifted relative to one another and with spectral profiling in the amplified radiation.
The monoclinic crystal structures results in a all-natural birefringence, helping to avoid thermally induced polarization rotation and depolarization decline.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and so are employed as lasing supplies to generate ultrashort (~ one hundred-200 fs) superior electric power pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser programs.
5 mm apart from the middle of your beam caustic. So that you can check the manner matching simulation, we done the experiment with Ng-Lower crystal oscillator, which was produced previously As well as in a similar issue with simulation [11]. As revealed in Figure three(b) with purple dots and line, the CW output energy is very dependent on the position of laser crystal along with the experimental result coincides very well with simulation final result. Being a note, multimode operation happened in experiment when the measurement of your pump beam is greater than TEM00 cavity method and it results in greater CW output electricity during the displacement location below 3.5 mm.
... at fifty percent-height were created in a very grasp oscillator with selfsynchronization in the axial modes, described inside our previously post. 21 The new edition on the laser, compared with that explained within our earlier post, utilized an Yb:KYW crystal with the N pcut (optical axis N p of your index ellipsoid was parallel towards the propagation direction on the laser radiation), with the polarization on the created radiation directed along the N m axis.
By substituting yttrium with ytterbium within the crystal lattice of Yb:KYW as a result of comparable dimensions of those chemical factors as much as a hundred% of Yb-doping may be attained.
While ytterbium-doped laser obtain media normally exhibit a small quantum defect, ytterbium-doped tungstates allow for especially little values. As an example, a 1030-nm Yb:YAG laser would Generally be pumped all around 940 nm, While Yb:KGW or Yb:KYW could possibly be most effectively pumped close to 981 nm.
Li2WO4-WO3 flux was productively used reducing the growth temperature underneath 900 oC. According to single crystal x-ray measurements, the crystal corresponds for the P2/n Room team.
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