Fascination About KGW Crystal
Fascination About KGW Crystal
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We utilized a transmission grating (TG) to be a dispersive element in our stretcher and compressor. A compact configuration was adopted, where by the stretcher as well as the compressor shared a person grating comparable to that in Ref.
In summary, we shown that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are productive nonlinear materials for broadband SC generation while in the close to-infrared and short-wave infrared spectral ranges, when pumped by 180 fs basic harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO generated two octave-spanning SC spectra, which Examine to SC spectra generated in YAG. These products show really comparable performances to YAG also concerning threshold and optimum pump pulse energies for SC era. Nevertheless, for what worries the likelihood to operate at superior laser pulse repetition level, YSO, LSO and LYSO clearly show resilient operation only at 10 kHz and quickly degrade (in just a few minutes) at twenty kHz. Besides the reasonably reduced SC era threshold (169 nJ), GGG demonstrated exceptional effectiveness qualities while in the brief-wave infrared Using the ideal pump pulse Vitality of 464 nJ, that is two instances decrease than in YAG: the biggest pink-shifted spectral broadening and the highest spectral energy density, outperforming KGW and YAG crystals in that aspect.
The monoclinic crystal structures results in a organic birefringence, helping to stay clear of thermally induced polarization rotation and depolarization reduction.
Amplified pulses using an Vitality higher than 2.5 mJ is usually predicted by making use of a greater pump electrical power to the regenerative amplifier and rendering it work with the saturation degree. The laser fluence of ~one J/cm2 within the dichroic mirrors is thought to generally be beneath the damage threshold of substantial-quality dielectric-coated mirrors.
Sooner or later, We're going to adopt a laser seed with a broader spectral bandwidth and apply an acousto-optical programmable dispersive filter to modulate the seed’s spectrum to produce full use in the acquire bandwidth of our regenerative amplifier.
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We strategy to spice up the heart beat Strength to above 40 mJ in two-stage multi-pass amplifiers, corresponding to a obtain component of twenty. In Every amplifier, we may also undertake two cascaded crystals put below orthogonal orientation to decrease the thermal load on Just about every crystal and click here compensate for the attain-narrowing effect.
We designed a diode-pumped Yb:KGW regenerative amplifier as being the entrance conclude of your kilohertz terawatt laser procedure. Broad bandwidth pulses have been obtained by implementing twin crystals with distinct orientations of their optical axes[
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KGW crystals are employed as Raman scattering resources as they have sturdy Raman scattering at a amount of different wavelengths. Any time a laser beam is directed onto the crystal, the photons within the laser beam interact with the crystal lattice, triggering many of the photons to scatter in a unique direction.