The best Side of KGW Crystal
The best Side of KGW Crystal
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In addition to its use being a Raman crystal, KGW can also be Utilized in other optical programs, such as in laser techniques and as being a scintillator in medical imaging.
In distinction, the seed laser might be amplified to more than 1 mJ under the orthogonal orientation configuration.
The comparison with glasses is appropriate Considering that the massive achieve bandwidth will allow e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
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Lastly, we investigated the extensive-term performances of SC technology in crystal samples below exceptional pumping circumstances at greater laser repetition charges. In doing so, the crystal samples were not translated and stored in a very stationary posture with regard towards the pump beam throughout the complete measurement. The illustrations illustrating robust extended-term performances of SC generation in KGW and YAG crystals at substantial laser repetition charges can be located elsewhere. Additional particularly, stable efficiency of KGW crystal at two MHz pulse repetition fee beneath pretty identical pump beam concentrating geometry was noted recently30, whereas YAG crystal shown stable performance for several hrs at two hundred kHz pulse repetition price Despite having extremely restricted focusing of the pump beam (NA=0.085)32. The extended-expression performance tests in LSO, LYSO and YSO exposed gradual narrowing from the SC spectra to the extensive-wavelength facet that happened just after a particular exposure time and will be attributed on the optical degradation of those components. As an illustration, in LSO, the onset of spectral narrowing was observed immediately after (sim 20) minutes in a laser repetition charge of ten kHz, whilst in a laser repetition fee of 20 kHz, stable SC generation effectiveness was observed just for approximately two min.
The particular spectra ended up reconstructed by correcting the calculated spectra using an account with the filter transmission capabilities and for your sensitivity functions in the spectrometers at the info publish-processing phase. The spectral dynamics in Just about every sample was calculated by high-quality tuning the pump pulse Electrical power with a computer-managed attenuator that was integrated inside the laser process. Thermal Electrical power meter EM (Ophir 3A-PF-twelve) was accustomed to evaluate the SC Power which was thereafter utilized to determine the spectral Power density in the SC radiation. Each of the measurements have been executed with none translation in the sample with respect for the pump beam.
The two-pump laser could present as many as a hundred and twenty W electricity. Around sixty% of the utmost pump energy was utilized within our experiment contemplating the lower functionality with the dichroic mirrors. Underneath this twin-crystal configuration, our cavity supports a a hundred W pump ability input, as mentioned in Section 2.two. High-high-quality dichroic mirrors might be utilized Sooner or later, and laser pulses will probably be stretched to an extended pulse duration.
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 from the compressor incident within the grating have been in the exact side; as a result, a slight angular tuning in the grating could possibly be built to acquire the ideal compression result. Within the compressor, the input angle over the grating and the distance involving the translation stage (S1) as well as the transmission grating (TG) ended up designed to compensate for your stretcher dispersion and all dispersion introduced from the components.
A multi-go key amplifier will further more Strengthen the Power to previously mentioned forty mJ. We're going to implement cryogenically cooled Yb:KGW technology to restrain the thermal outcome. Two levels of compression will likely be made use of following amplification. The very first stage involves a typical Treacy-type compressor, and will compress the pulse length to below three hundred fs using an effectiveness of about 70%. The 2nd phase consists of a fuel-loaded multi-go cell[
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Assembling tungsten oxide hydrate nanocrystal colloids shaped by laser ablation in liquid into rapidly-reaction electrochromic movies.