The 2-Minute Rule for KGW Crystal
The 2-Minute Rule for KGW Crystal
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]. Due to short storage time, Ti:sapphire is often pumped by frequency-doubled Nd:YAG or Nd:glass reliable-condition lasers, which leads to a bulky and complicated program with superior Charge. As opposed with traditional CPA laser programs, the OPCPA procedure can get hold of a shorter pulse length and the next peak electricity.
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Besides its use to be a Raman crystal, KGW can be Utilized in other optical applications, such as in laser programs and being a scintillator in health care imaging.
], but it could incorporate way more Price tag to this element. The intra-cavity spectral acquire curve could possibly be modulated by inserting an etalon that reduces the actual obtain in the wavelength with the maximum obtain variable[
Amplified pulses with an Vitality above 2.five mJ is often predicted by applying a better pump power to your regenerative amplifier and making it get the job done within the saturation stage. The laser fluence of ~one J/cm2 over the dichroic mirrors is considered to generally be down below the injury threshold of high-high-quality dielectric-coated mirrors.
Having said that, once Nd3+:YAG turned commercially available, the fascination in CaWO4 dropped sharply. In afterwards years, specified other tungstate crystals started to catch the attention of a KGW Crystal great deal of interest.
In its elemental sort, gadolinium incorporates a silvery-white overall look. Gadolinium is often a unusual earth or lanthanide ingredient that possesses exclusive Qualities useful to specialised programs for example semiconductor fabrication and nuclear reactor shielding. It is actually used for both equally its higher magnetic second (seven.94μ B) and in phosphors and scintillator crystals. When complexed with EDTA ligands, it is made use of as an injectable distinction agent for MRIs. The factor is named after the Finnish chemist and geologist Johan Gadolin.
We prepare to boost the pulse Electrical power to earlier mentioned 40 mJ in two-phase multi-pass amplifiers, similar to a acquire element of twenty. In Just about every amplifier, we can even undertake two cascaded crystals placed below orthogonal orientation to reduce the thermal load on Every single crystal and compensate with the achieve-narrowing influence.
Figure 4 Beam radius variation on The 2 crystals though modifying the focal duration of your thermal lensing effect.
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-switched output spectrum on the regenerative amplifier supports a sub-a hundred and sixty fs pulse amplification. As a result, pulses with energies of as many as 2 mJ and period down below 200 fs can be received employing better-good quality dichroic mirrors plus a broader-spectrum laser seed. This regenerative amplifier will work as a great pre-amplifier for further more laser amplification.
Determine 4 Beam radius variation on the two crystals while modifying the focal size from the thermal lensing result.
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