Considerations To Know About KYW Crystal
Considerations To Know About KYW Crystal
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The comparison with Eyeglasses is suitable Considering that the large attain bandwidth will allow e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
We present a twin-crystal Yb:KGW laserthat iscapable to work for a Q-switched oscillator with output electric power approximately 24 W and pulse length of twenty ns,or for a regenerative amplifier with output electrical power as much as 21 W and pulse period beneath two hundred fs right after compression of chirped pulses. Each lasers have fantastic beam good quality with beam parameter M2
Colour-coded reflectivity of the Bragg mirror like a purpose of wavelength and angle of the incident beam.
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with immediate longitudinal pumping by powerful linear arrays of semiconductor injection lasers having fiber output. To forestall spectral narrowing through amplification along with the corresponding lengthening in the amplified pulse when it really is compressed, a combination of two Yb:KYW crystals have been used, With all the spectral maxima with the amplification shifted relative to one another and with spectral profiling of the amplified radiation.
Following air drying and subsequent cleaning which has a cotton fabric soaked in alcohol, the movie surface confirmed no signs of peeling or scratches.
FIG. one. Optical format of the laser with direct pumping with the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output
5 mm apart from the middle with the beam caustic. So as to Examine the mode matching simulation, we performed the experiment with Ng-Slash crystal oscillator, which was made Earlier and in a exact affliction with simulation [11]. As revealed in Figure three(b) with pink dots and line, the CW output electric power is highly depending on the placement of laser crystal and also the experimental final result coincides very well with simulation end result. As a Observe, multimode operation transpired in experiment when the dimension of your pump beam is greater than TEM00 cavity manner and it causes larger CW output electric power in the displacement region beneath 3.5 mm.
For tungstates, the ytterbium doping focus can be very substantial with out important quenching as the replaced ions have an extremely identical ion radius, and also the inter-ion distance is fairly significant.
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW due to the similar dimensions of those chemical factors check here as much as a hundred% of Yb-doping may very well be reached.
While ytterbium-doped laser gain media commonly show a little quantum defect, ytterbium-doped tungstates make it possible for for significantly small values. For instance, a 1030-nm Yb:YAG laser would Usually be pumped about 940 nm, Whilst Yb:KGW or Yb:KYW could be most proficiently pumped close to 981 nm.
This tandem of attributes has far-reaching implications, specially in the construction of compact but powerfull lasers.
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Simultaneously, a shorter laser wavelength is usually attained; it can be done to function having a quantum defect well down below one%. Being a consequence, the warmth era may be so smaller that this partly compensates the reduce thermal conductivity.