The Definitive Guide to KGW Crystal
The Definitive Guide to KGW Crystal
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We utilized a transmission grating (TG) as being a dispersive part in our stretcher and compressor. A compact configuration was adopted, where by the stretcher as well as compressor shared a person grating much like that in Ref.
Consequently There is certainly tiny liberty for optimizing the dispersion compensation influence. Sub-200 fs pulses is usually expected which has a broader bandwidth seed enter. Due to the twin-crystal configuration, the laser cavity delivers a in close proximity to diffraction limited laser beam with M
-switched mode. The bandwidth during the orthogonal orientation was Plainly Considerably broader. The calculated Fourier rework limited pulse period was as short as sub-a hundred and sixty fs. Underneath the configuration the place The 2 crystals ended up put in exactly the same orientation, Using the seed enter, the amplified pulse bandwidth was only three nm with one hundred eighty μJ Power when it broke the dichroic mirrors.
]. Etalon insertion would bring on added decline, nonetheless, time-to-time optimization would introduce the risk of part harm and instability on the process. A nonlinear regenerative amplifier could instantly supply pulses with a period as low as ninety seven fs plus a spectral bandwidth of 19 nm[
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The threshold Vitality for SC technology (hbox E _ textrm th ) was described as the pump pulse Power, in which the blue-shifted spectral broadening promptly settles to a certain Lower-off wavelength That continues to be Nearly regular In spite of further improve with the pump pulse Electricity. The optimum energy (hbox E _textrm decide ), was defined as the pump pulse Strength, which makes the largest purple-shifted spectral broadening ahead of the onset of periodic modulation while in the SC spectrum resulting from filament refocusing.
The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The input of the stretcher (incident angle: fifty two°) and that with the compressor incident in the grating were being from the similar aspect; therefore, a slight angular tuning in the grating could be manufactured to acquire the top compression result. Inside the compressor, the input angle about the grating and the gap in between the interpretation phase here (S1) as well as the transmission grating (TG) were being made to compensate for that stretcher dispersion and all dispersion launched through the supplies.
A multi-move key amplifier will further more Strengthen the Electrical power to higher than forty mJ. We'll use cryogenically cooled Yb:KGW engineering to restrain the thermal impact. Two stages of compression will be used just after amplification. The main phase requires a common Treacy-type compressor, and could compress the pulse period to underneath 300 fs having an effectiveness of around 70%. The second phase requires a fuel-stuffed multi-pass cell[
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