5 Simple Statements About KGW Crystal Explained
5 Simple Statements About KGW Crystal Explained
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The purple-shifted Component of the SC is of simple value, specifically for what problems the performance of broadly tunable optical parametric amplifiers pumped by the elemental harmonics of Yb lasers. The shortage of seed photons from the very long-wavelength area in the SC spectrum limits the amplification performance and brings about pulse-to-pulse Electrical power fluctuations round the degeneracy area from the optical parametric amplifier. This aspect is quantified in Fig. 6a by plotting the SC spectra concerning spectral Electricity density, which was estimated by measuring the energy with the axial Component of SC radiation (which can be the sole virtually useful Component of SC emission). KGW crystal generates the highest spectral energy density during the 1200�?450 nm assortment, as observed within a current study30.
], but it would incorporate considerably more cost to this part. The intra-cavity spectral gain curve could possibly be modulated by inserting an etalon that reduces the actual gain within the wavelength with the utmost achieve component[
For tungstates, the ytterbium doping concentration can be extremely significant without having important quenching as the replaced ions have an extremely identical ion radius, plus the inter-ion length is relatively significant.
Various methods happen to be adopted to unravel this problem. An acousto-optical programmable dispersive filter is often used to modulate the seed’s spectrum to suppress the achieve-narrowing result[
Eventually, we investigated the extended-time period performances of SC era in crystal samples less than optimum pumping ailments at better laser repetition fees. In doing so, the crystal samples were not translated and held inside a stationary placement with respect to the pump beam in the complete measurement. The examples illustrating robust extensive-time period performances of SC generation in KGW and YAG crystals at substantial laser repetition charges could be observed in other places. Extra specially, secure general performance of KGW crystal at two MHz check here pulse repetition rate underneath quite related pump beam concentrating geometry was described recently30, Whilst YAG crystal demonstrated steady overall performance for several several hours at two hundred kHz pulse repetition level Despite extremely tight focusing on the pump beam (NA=0.085)32. The prolonged-time period efficiency checks in LSO, LYSO and YSO exposed gradual narrowing of the SC spectra on the lengthy-wavelength side that occurred soon after a particular publicity time and could be attributed to the optical degradation of these resources. For example, in LSO, the onset of spectral narrowing was observed right after (sim 20) minutes at a laser repetition rate of ten kHz, whilst at a laser repetition rate of twenty kHz, secure SC generation effectiveness was observed just for about two min.
Request RP Photonics for any guidance concerning tungstate lasers, such as femtosecond lasers and high-energy lasers.
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]. The dual-crystal configuration lowers the thermal load on Each individual crystal even though sustaining a large achieve, and facilitates the payment of every one’s thermal lensing result. As a result, the laser cavity can operate with a substantial balance assortment over the thermal lensing result variation.