The KYW Crystal Diaries
The KYW Crystal Diaries
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This exclusive characteristic of ultrafast pulses permits nonlinear optical interaction with tissue at small Over-all exposure, and drives apps including deep-tissue multiphoton microscopy and high-precision eye surgical procedures
The Yb:KYW crystal’s proficiency in light-weight absorption at about 981 nm can make the crystal well matched for diode pumping. It really is additional Improved by its outstanding effectiveness in this method, coupled with its low quantum defect.
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This paper describes a femtosecond laser regenerative amplifier depending on two Yb:KYW crystals with direct longitudinal pumping by potent linear arrays of semiconductor injection lasers having fiber output. To circumvent spectral narrowing all through amplification plus the corresponding lengthening on the amplified pulse when it's compressed, a mix of two Yb:KYW crystals have been used, While using the spectral maxima in the amplification shifted relative to one another and with spectral profiling of your amplified radiation.
In advance of the development of Nd:YAG, Nd3+:CaWO4 was a very important uncommon-earth-doped laser obtain medium. It absolutely was in truth Employed in the 1st consistently running crystal laser.
FIG. one. Optical layout of the laser with direct pumping While using the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
5 mm apart from the center with the beam caustic. So as to Check out the mode matching simulation, we performed the experiment with Ng-Slice crystal oscillator, which was designed Beforehand As well as in a exact same ailment with simulation [11]. As shown in Figure three(b) with crimson dots and line, the CW output power is extremely depending on the situation of laser crystal along with the experimental result coincides very well with simulation outcome. click here For a note, multimode operation transpired in experiment in the event the sizing in the pump beam is larger sized than TEM00 cavity mode and it triggers better CW output power inside the displacement area under three.5 mm.
For tungstates, the ytterbium doping concentration can be extremely large without the need of considerable quenching since the changed ions have a really very similar ion radius, and the inter-ion distance is pretty big.
Higher-ability repetitively pulsed ytterbium lasers with supershort pulse width and direct diode pumping for technological and biomedical programs
Even though ytterbium-doped laser get media frequently show a little quantum defect, ytterbium-doped tungstates make it possible for for especially compact values. For example, a 1030-nm Yb:YAG laser would normally be pumped around 940 nm, Whilst Yb:KGW or Yb:KYW may very well be most successfully pumped all around 981 nm.
This tandem of characteristics has far-reaching implications, significantly in the construction of compact nevertheless powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at area temperature have been measured. The emission spectrum and lifetime of the three File 4 energized point out were identified. Utilizing standard and modified Judd–Ofelt theories, the depth parameters and the radiative lifetimes ended up calculated and very good settlement While using the experimental effects was attained for the two theories.
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