Not known Facts About KGW Crystal
Not known Facts About KGW Crystal
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Previous do the job showed that the twin-crystal configuration can be utilized to compensate with the thermal lensing effect[
Whilst ytterbium-doped laser acquire media usually exhibit a little quantum defect, ytterbium-doped tungstates make it possible for for particularly compact values. Such as, a 1030-nm Yb:YAG laser would Ordinarily be pumped all-around 940 nm, Whilst Yb:KGW or Yb:KYW may be most competently pumped all over 981 nm.
The obtain bandwidth e.g. of Yb:KGW and Yb:KYW may be very big in contrast with that of Yb:YAG. This allows for broad wavelength tunability and for Significantly shorter pulse durations from method-locked lasers. Values effectively under 100 fs are actually reached with passive mode locking.
The purple-shifted Section of the SC is of functional importance, especially for what problems the general performance of broadly tunable optical parametric amplifiers pumped by the basic harmonics of Yb lasers. The lack of seed photons in the long-wavelength area from the SC spectrum limits the amplification effectiveness and leads to pulse-to-pulse Power fluctuations across the degeneracy region on the optical parametric amplifier. This factor is quantified in Fig. 6a by plotting the SC spectra with regards to spectral Power density, which was estimated by measuring the Electrical power on the axial part of SC radiation (and that is the sole basically useful Section of SC emission). KGW crystal makes the very best spectral Electrical power density within the 1200�?450 nm array, as mentioned inside of a new study30.
], but it will include much more cost to this element. The intra-cavity spectral achieve curve may be modulated by inserting an etalon that reduces the particular attain on the wavelength with the utmost attain element[
Amplified pulses having an Vitality over two.5 mJ is often anticipated by making use of a better pump ability towards the regenerative amplifier and rendering it work on the saturation amount. The laser fluence of ~1 J/cm2 to the dichroic mirrors is believed to get beneath the problems threshold of significant-good quality dielectric-coated mirrors.
The other was positioned with its Np -axis parallel With all the s-polarized direction. A comparison was designed between a configuration Using the crystals positioned in the same orientation (
Comparison of spectral Electrical power densities of supercontinua developed from the ailments of exceptional pumping from the investigated components.
The particular spectra had been reconstructed by correcting the calculated spectra with an account for that filter transmission capabilities and to the sensitivity capabilities with the spectrometers at the data put up-processing phase. The spectral dynamics in Every sample was measured by fantastic tuning the pump pulse Electricity with a computer-managed attenuator which was built-in inside the laser system. Thermal Electricity meter EM (Ophir 3A-PF-twelve) was used to evaluate the SC Vitality which was thereafter utilized to estimate the spectral energy density of the SC radiation. The many measurements have been done with no translation on the sample with respect to your pump beam.
The 2-pump laser could supply around one hundred twenty W electrical power. Somewhere around 60% of the maximum pump energy was utilized within our experiment thinking of the minimal effectiveness from the dichroic mirrors. Below this dual-crystal configuration, our cavity supports a one hundred W pump electricity input, as discussed in Section 2.two. Substantial-high quality dichroic click here mirrors might be utilized Later on, and laser pulses will be stretched to an extended pulse duration.
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-switched output spectrum of the regenerative amplifier supports a sub-160 fs pulse amplification. Therefore, pulses with energies of nearly 2 mJ and length below two hundred fs may be attained employing greater-high-quality dichroic mirrors plus a broader-spectrum laser seed. This regenerative amplifier operates as a very good pre-amplifier for more laser amplification.
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