A Simple Key For KGW Crystal Unveiled
A Simple Key For KGW Crystal Unveiled
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]. Mainly because of the small storage time, Ti:sapphire is typically pumped by frequency-doubled Nd:YAG or Nd:glass reliable-state lasers, which leads to a cumbersome and complicated program with superior Price. Compared with common CPA laser programs, the OPCPA technique can get hold of a shorter pulse length and the next peak electric power.
While ytterbium-doped laser obtain media frequently show a little quantum defect, ytterbium-doped tungstates make it possible for for especially tiny values. By way of example, a 1030-nm Yb:YAG laser would Generally be pumped all over 940 nm, whereas Yb:KGW or Yb:KYW may be most effectively pumped close to 981 nm.
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The purple-shifted Element of the SC is of realistic importance, specifically for what fears the overall performance of broadly tunable optical parametric amplifiers pumped by the fundamental harmonics of Yb lasers. The dearth of seed photons in the lengthy-wavelength region of your SC spectrum boundaries the amplification effectiveness and results in pulse-to-pulse Vitality fluctuations throughout the degeneracy area of the optical parametric amplifier. This factor is quantified in Fig. 6a by plotting the SC spectra regarding spectral Electrical power density, which was approximated by measuring the Power of your axial Portion of SC radiation (which happens to be the only real pretty much practical Section of SC emission). KGW crystal generates the best spectral Electrical power density inside the 1200�?450 nm selection, as famous inside a the latest study30.
In contrast, the seed laser can be amplified to above one mJ beneath the orthogonal orientation configuration.
Just before the development of Nd:YAG, Nd3+:CaWO4 was a vital rare-earth-doped laser obtain medium. It had been in reality used in read more the initial continually working crystal laser.
A number of methods have been adopted to solve this problem. An acousto-optical programmable dispersive filter is often used to modulate the seed’s spectrum to suppress the acquire-narrowing result[
The black line denotes the configuration Using the crystals placed in the identical orientation, although the crimson line is beneath the configuration of crystals positioned in orthogonal orientation.
The actual spectra were reconstructed by correcting the measured spectra having an account for that filter transmission capabilities and for that sensitivity functions on the spectrometers at the data article-processing phase. The spectral dynamics in each sample was calculated by high-quality tuning the pump pulse Power with a pc-controlled attenuator that was built-in in the laser system. Thermal Power meter EM (Ophir 3A-PF-twelve) was used to evaluate the SC energy which was thereafter utilized to work out the spectral Electricity density of your SC radiation. Every one of the measurements were performed without any translation of your sample with respect on the pump beam.
Figure 4 Beam radius variation on the two crystals while shifting the focal duration in the thermal lensing outcome.
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-switched laser output under the two crystal placement configurations. The black line denotes the configuration With all the crystals positioned in the identical orientation, although the crimson line is underneath the configuration of crystals put in orthogonal orientation.
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