Not known Details About KGW Crystal
Not known Details About KGW Crystal
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The thermal conductivity of common double tungstates is of the get to three–4 W/(K m) �?which is not undesirable in comparison with other laser crystals (Whilst various instances less than for YAG), and reasonably substantial compared Using the thermal conductivity of standard glasses.
We applied a transmission grating (TG) for a dispersive element inside our stretcher and compressor. A compact configuration was adopted, the place the stretcher along with the compressor shared one particular grating similar to that in Ref.
The purple-shifted Component of the SC is of simple great importance, especially for what problems the general performance of broadly tunable optical parametric amplifiers pumped by the fundamental harmonics of Yb lasers. The lack of seed photons while in the lengthy-wavelength area of the SC spectrum limitations the amplification efficiency and results in pulse-to-pulse energy fluctuations round the degeneracy location from the optical parametric amplifier. This aspect is quantified in Fig. 6a by plotting the SC spectra with regard to spectral Electricity density, which was approximated by measuring the Electricity in the axial part of SC radiation (which can be the one almost handy Element of SC emission). KGW crystal creates the best spectral Strength density within the 1200�?450 nm variety, as mentioned in a the latest study30.
], but it might incorporate far more cost to this element. The intra-cavity spectral obtain curve can be modulated by inserting an etalon that lessens the actual attain for the wavelength with the most gain component[
Amplified pulses with an Power higher than two.5 mJ is usually anticipated by implementing a greater pump electricity for the regenerative amplifier and rendering it get the job done within the saturation degree. The laser fluence of ~one J/cm2 to the dichroic mirrors is thought being underneath the hurt threshold of substantial-quality dielectric-coated mirrors.
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We developed a diode-pumped Yb:KGW regenerative amplifier because the front finish from the kilohertz terawatt laser method. Wide bandwidth pulses were being received by making use of dual crystals with various orientations of their optical axes[
The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The enter with the stretcher (incident angle: fifty two°) and that on the compressor incident with the grating have been with the similar aspect; consequently, a slight angular tuning in the grating could possibly be produced to obtain the best compression result. Within the compressor, the enter angle to the grating and the gap among the translation phase (S1) along with the transmission grating (TG) have been built to compensate to the stretcher dispersion and all dispersion introduced via the elements.
Tungstates are likely to obtain significant Raman coefficients (�?Raman scattering). As a result, they might generate sizeable Raman obtain at reasonable optical intensities. It can be done to use the laser crystal by itself to be a Raman converter.
Figure four Beam radius variation on the two crystals when modifying the focal duration in the thermal lensing outcome.
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