An Unbiased View of KGW Crystal
An Unbiased View of KGW Crystal
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Figure eight Intra-cavity pulse amplification course of action monitored by an oscilloscope. The heartbeat underwent an unsaturated amplification because of the mirror damage limitation.
Hence There may be small flexibility for optimizing the dispersion compensation result. Sub-two hundred fs pulses might be expected with a broader bandwidth seed input. Thanks to the twin-crystal configuration, the laser cavity delivers a near diffraction restricted laser beam with M
In distinction, the seed laser may be amplified to around one mJ underneath the orthogonal orientation configuration.
The measured Reduce-off wavelengths for the quick-wavelength side are consistent with the general craze of blue-shifted spectral broadening on the bandgap of nonlinear materials. All of the nonlinear products developed acceptable purple-shifted spectral broadenings underneath situations of best pump pulse energies, with the biggest red-shift exceeding 2000 nm measured in GGG crystal. Our final results exposed that GGG and BGO (which also had the bottom supercontinuum technology threshold) provide strong, optical destruction-no cost general performance at a laser repetition rate of two hundred kHz, suggesting that these components are very good options to YAG and KGW for low threshold, large ordinary power supercontinuum generation while in the around- and small-wave infrared spectral ranges. We also shown that scintillating Qualities of bulk products could possibly be commonly studied from the filamentation regime, by way of multiphoton excitation utilizing around-infrared femtosecond laser pulses.
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The actual spectra have been reconstructed by correcting the measured spectra with the account for your filter transmission features and to the sensitivity functions on the spectrometers at the information submit-processing stage. The spectral dynamics in Just about every sample was measured by fantastic tuning the pump pulse Power with a pc-controlled attenuator which was integrated from the laser program. Thermal energy meter EM (Ophir 3A-PF-12) was utilized to measure the SC Electricity which was thereafter used to estimate the spectral energy density in the SC radiation. All the measurements ended up performed with no translation with the sample with regard towards the pump beam.
The two-pump laser could provide around one hundred twenty W electric power. Close to sixty% of the most pump ability was used within our experiment thinking of the small overall performance from the dichroic mirrors. Below this dual-crystal configuration, our cavity supports a 100 W pump electrical power input, as talked about in Area 2.2. Large-good quality dichroic mirrors might be applied Later on, and laser pulses will likely be stretched to a longer pulse length.
The Martinez stretcher stretched the seed pulses to ~250 ps with 1600 grooves/mm grating. The enter from the stretcher (incident angle: fifty two°) and that with the compressor incident in the grating have been in the similar facet; that's why, a slight angular tuning in the grating can be created to get the top compression consequence. During the compressor, the input angle on the grating and the distance amongst the translation phase (S1) and also the transmission grating (TG) ended up designed to get more info compensate for the stretcher dispersion and all dispersion released because of the resources.
-switched output spectrum on the regenerative amplifier supports a sub-a hundred and sixty fs pulse amplification. Thus, pulses with energies of as much as two mJ and length under two hundred fs is often attained using higher-high-quality dichroic mirrors in addition to a broader-spectrum laser seed. This regenerative amplifier works as a good pre-amplifier for additional laser amplification.
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]. The dual-crystal configuration lowers the thermal load on Every single crystal though sustaining a significant gain, and facilitates the compensation of every one’s thermal lensing influence. Consequently, the laser cavity can get the job done with a sizable security vary more than the thermal lensing result variation.