Fascination About KGW Crystal
Fascination About KGW Crystal
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The thermal conductivity of widespread double tungstates is with the purchase to three–4 W/(K m) �?which isn't negative compared with other laser crystals (although various instances below for YAG), and reasonably big compared with the thermal conductivity of standard glasses.
We used a transmission grating (TG) for a dispersive element inside our stretcher and compressor. A compact configuration was adopted, exactly where the stretcher plus the compressor shared a person grating just like that in Ref.
As a result You can find tiny freedom for optimizing the dispersion compensation impact. Sub-two hundred fs pulses may be anticipated by using a broader bandwidth seed enter. Due to the dual-crystal configuration, the laser cavity provides a near diffraction minimal laser beam with M
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For tungstates, the ytterbium doping concentration can be very high without the need of considerable quenching as the changed ions have an extremely related ion radius, and the inter-ion distance is relatively massive.
The opposite was put with its Np -axis parallel Together with the s-polarized direction. A comparison was designed in between a configuration Along with the crystals put in exactly the same orientation (
KGW (potassium gadolinium tungstate) is a crystal that is usually made use of to be a Raman crystal in Raman spectroscopy. It's really a colorless, transparent crystal that has a superior Raman scattering performance and a robust Raman spectrum, which makes it ideal for An array of Raman apps.
]. This process was depending on The truth that the spectral emission cross-section curves differ from each other when laser polarization is paralleled to the different optical axis of Yb-doped double tungstates[
The 2-pump laser could offer you as many as one hundred twenty W power. Somewhere around 60% of the utmost pump ability was applied inside our experiment thinking of the lower overall performance of your dichroic mirrors. Beneath this twin-crystal configuration, our cavity supports a 100 W pump electric power input, as talked over in Segment 2.2. Significant-quality dichroic mirrors are going to be utilized Later on, and laser pulses is going to be stretched to a longer pulse period.
The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The input from the stretcher (incident angle: fifty two°) and that in the compressor incident on the grating had been in the very same aspect; consequently, a slight angular tuning of the grating can be made to acquire the very best compression result. During the compressor, the input angle about the grating and the distance involving the translation stage (S1) as well as transmission grating (TG) had been created to compensate with the stretcher dispersion and all dispersion introduced because of the supplies.
-switched laser output beneath the two crystal placement configurations. The black line denotes the configuration Using the crystals positioned in the same orientation, although the red line is beneath the configuration of crystals positioned in orthogonal orientation.
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