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Hence There is certainly small flexibility for optimizing the dispersion payment result. Sub-200 fs pulses is usually envisioned using a broader bandwidth seed input. Because of the twin-crystal configuration, the laser cavity delivers a around diffraction minimal laser beam with M

], but it will add a great deal more Value to this component. The intra-cavity spectral obtain curve may be modulated by inserting an etalon that minimizes the particular acquire in the wavelength with the maximum gain aspect[

The calculated Lower-off wavelengths at the small-wavelength aspect are in line with the overall development of blue-shifted spectral broadening over the bandgap of nonlinear product. Each of the nonlinear elements produced affordable pink-shifted spectral broadenings under conditions of exceptional pump pulse energies, with the biggest red-change exceeding 2000 nm calculated in GGG crystal. Our success disclosed that GGG and BGO (which also had the lowest supercontinuum era threshold) offer long lasting, optical hurt-no cost performance in a laser repetition price of two hundred kHz, suggesting that these materials are good solutions to YAG and KGW for lower threshold, high ordinary energy supercontinuum technology in the around- and short-wave infrared spectral ranges. We also shown that scintillating Qualities of bulk supplies could be commonly studied while in the filamentation routine, by means of multiphoton excitation using near-infrared femtosecond laser pulses.

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KGW (potassium gadolinium tungstate) is really a crystal that is usually made use of being a Raman click here crystal in Raman spectroscopy. It's really a colorless, transparent crystal that features a large Raman scattering efficiency and a strong Raman spectrum, rendering it appropriate for An array of Raman purposes.

We approach to spice up the pulse Electricity to above 40 mJ in two-stage multi-go amplifiers, similar to a gain aspect of twenty. In Each individual amplifier, we will also undertake two cascaded crystals positioned less than orthogonal orientation to lessen the thermal load on Every crystal and compensate to the attain-narrowing effect.

The edge Electrical power for SC generation (hbox E _ textrm th ) was defined as the pump pulse Electrical power, where the blue-shifted spectral broadening quickly settles to a particular cut-off wavelength that remains Just about consistent even with additional raise in the pump pulse Power. The ideal Power (hbox E _textrm choose ), was outlined as the pump pulse energy, which generates the most important pink-shifted spectral broadening before the onset of periodic modulation during the SC spectrum as a result of filament refocusing.

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-switched output spectrum in the regenerative amplifier supports a sub-160 fs pulse amplification. As a result, pulses with energies of around two mJ and period down below 200 fs is often attained working with higher-quality dichroic mirrors along with a broader-spectrum laser seed. This regenerative amplifier functions as a great pre-amplifier for additional laser amplification.

Determine eight Intra-cavity pulse amplification approach monitored by an oscilloscope. The heart beat underwent an unsaturated amplification due to mirror damage limitation.

The two energies are marked through the dashed lines as well as their values are labeled during the plots. The identical features were also observed in KGW and YAG crystals, whose spectral broadening dynamics are proven for the comparison in Fig. 4.