The smart Trick of KGW Crystal That No One is Discussing

The smart Trick of KGW Crystal That No One is Discussing

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Although ytterbium-doped laser obtain media typically exhibit a little quantum defect, ytterbium-doped tungstates enable for specially small values. For example, a 1030-nm Yb:YAG laser would Usually be pumped close to 940 nm, While Yb:KGW or Yb:KYW could be most proficiently pumped all-around 981 nm.

The gain bandwidth e.g. of Yb:KGW and Yb:KYW may be very substantial in comparison with that of Yb:YAG. This enables for broad wavelength tunability and for Substantially shorter pulse durations from method-locked lasers. Values well down below a hundred fs are actually realized with passive mode locking.

Simultaneously, a shorter laser wavelength may be attained; it is possible to work that has a quantum defect well underneath 1%. Being a consequence, the warmth generation might be so little that this partly compensates the reduced thermal conductivity.

-switched method. The bandwidth during the orthogonal orientation was Evidently Significantly broader. The calculated Fourier transform limited pulse period was as limited as sub-a hundred and sixty fs. Beneath the configuration wherever The 2 crystals were being positioned in a similar orientation, While using the seed enter, the amplified pulse bandwidth was only three nm with 180 μJ Electricity when it broke the dichroic mirrors.

For tungstates, the ytterbium doping concentration can be very higher without having major quenching because the replaced ions have a really equivalent ion radius, as well as the inter-ion distance is relatively big.

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Eventually, we investigated the extended-term performances of SC technology in crystal samples less than best pumping circumstances at greater laser repetition fees. In doing so, the crystal samples weren't translated and retained in the stationary placement with regard towards the pump beam in the whole measurement. The illustrations illustrating strong prolonged-term performances of SC generation in KGW and YAG crystals at large laser repetition costs might be observed elsewhere. Additional especially, stable overall performance of KGW crystal at 2 MHz pulse repetition fee underneath extremely equivalent pump beam concentrating geometry was reported recently30, While YAG crystal shown secure efficiency for a number of hours at two hundred kHz pulse repetition amount Despite having very tight concentrating in the pump beam (NA=0.085)32. The extensive-expression efficiency assessments in LSO, LYSO and YSO unveiled gradual narrowing with the SC spectra about the prolonged-wavelength facet that happened following a certain exposure time and will be attributed for the optical degradation of those products. As an example, in LSO, the onset of spectral narrowing was observed soon after (sim 20) minutes at a laser click here repetition amount of ten kHz, when at a laser repetition level of twenty kHz, steady SC era effectiveness was noticed just for approximately 2 min.

The actual spectra were reconstructed by correcting the calculated spectra having an account for your filter transmission capabilities and for the sensitivity features of your spectrometers at the information post-processing phase. The spectral dynamics in each sample was measured by wonderful tuning the pump pulse Strength with a pc-managed attenuator which was built-in within the laser procedure. Thermal Vitality meter EM (Ophir 3A-PF-12) was utilized to measure the SC Electrical power which was thereafter accustomed to estimate the spectral Vitality density with the SC radiation. All of the measurements were done with none translation with the sample with respect on the pump beam.

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Whilst BGO, GGG, YSO, LSO and LYSO often function laser hosts37, they are primarily identified as effective scintillators, whose scintillation Homes are studied quite well38. Even so, the nonlinear optical properties of those crystals and so their probable to serve as nonlinear materials for SC generation particularly, and almost every other experiments about nonlinear propagation of rigorous femtosecond laser pulses, keep on being incredibly badly analyzed. So far, GGG, LT23,twenty five and YSO24 have been only sketchily examined for SC generation with Ti:sapphire laser pumping, on the other hand, to the most effective of our expertise, none of the investigated elements ended up examined with Yb-laser pumping, especially for what problems their functionality at incredibly superior (tens to countless kHz) pulse repetition prices.

KGW has a powerful Raman spectrum that extends in the ultraviolet for the in close proximity to infrared, rendering it beneficial for A selection of purposes. The crystal can be employed like a reference product for Raman spectroscopy, as well as a sample for learning Raman scattering during the stable condition.

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]. The twin-crystal configuration lowers the thermal load on Each and every crystal while keeping a significant get, and facilitates the payment of every one’s thermal lensing impact. Hence, the laser cavity can get the job done with a substantial balance range about the thermal lensing influence variation.