KYW Crystal Secrets
KYW Crystal Secrets
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The acquire bandwidth e.g. of Yb:KGW and Yb:KYW is rather large in comparison with that of Yb:YAG. This enables for large wavelength tunability and for much shorter pulse durations from mode-locked lasers. Values effectively underneath 100 fs have been attained with passive method locking.
This one of a kind attribute of ultrafast pulses enables nonlinear optical conversation with tissue at lower All round publicity, and drives applications like deep-tissue multiphoton microscopy and high-precision eye surgical procedures
We present a dual-crystal Yb:KGW laserthat iscapable to operate like a Q-switched oscillator with output electrical power approximately 24 W and pulse duration of twenty ns,or as being a regenerative amplifier with output energy approximately 21 W and pulse duration underneath 200 fs after compression of chirped pulses. Both lasers have superb beam high quality with beam parameter M2
Color-coded reflectivity of a Bragg mirror like a functionality of wavelength and angle of the incident beam.
This paper describes a femtosecond laser regenerative amplifier determined by 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 in the amplified pulse when it's compressed, a mix of two Yb:KYW crystals were made use of, Along with the spectral maxima from the amplification shifted relative to one another and with spectral profiling from the amplified radiation.
Just before the event of Nd:YAG, Nd3+:CaWO4 was a vital unusual-earth-doped laser attain medium. It was the truth is Employed in the very first continually running crystal laser.
FIG. one. Optical format of the laser with direct pumping While using the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output
five mm other than the center of the beam caustic. In order to Look at the method matching simulation, we performed the experiment with Ng-Minimize crystal oscillator, which was created Beforehand As well as in a exact same ailment with simulation [11]. As demonstrated in Determine 3(b) with crimson dots and line, the CW output energy is extremely depending on the place of laser crystal along with the experimental final result coincides nicely with simulation final result. As a Be aware, multimode operation happened in experiment once the sizing of your pump beam is larger than TEM00 cavity method and it will cause bigger CW output electric power inside the displacement region underneath three.five mm.
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By substituting yttrium with ytterbium while in the crystal lattice of Yb:KYW a result of the comparable dimensions of those chemical components nearly one hundred% of Yb-doping might be obtained.
Though ytterbium-doped laser attain media generally show a little quantum defect, ytterbium-doped tungstates make it possible for for significantly compact values. For example, a 1030-nm Yb:YAG more info laser would Ordinarily be pumped around 940 nm, Whilst Yb:KGW or Yb:KYW may very well be most successfully pumped all around 981 nm.
Li2WO4-WO3 flux was correctly applied lowering the growth temperature down below 900 oC. Based on solitary crystal x-ray measurements, the crystal corresponds on the P2/n Place team.
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