This efficiency is important, especially when just one considers the technology of your 266nm wavelength, where by even small inefficiencies can result in major energy losses.
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Once the Rayleigh vary is lower than the crystal thickness, the space about which the beam is optimally intense is lower than the crystal thickness.
The elemental area now driving the kind-I SHG system would be the Eoγ element of the incident discipline. At γ = 90°, there can be zero SHG output, since the travel subject Eoγ = 0.
Hygroscopic crystal materials deteriorate when they are not always saved in adequately dry air (or maybe a dry purge gas). This applies e.g. to KDP and BBO, and in a lesser extent to LBO. It may be useful to maintain this kind of crystal in a fairly elevated temperature, which makes it easier to keep it dry.
Many things can influence the overall performance of BBO crystals. These include things like temperature, humidity, and the caliber of the incident light-weight. Correct handling and storage may also help maintain the crystal’s overall performance. Temperature can affect the phase-matching circumstances of BBO crystals, which subsequently has an effect on their efficiency in frequency conversion applications.
The vast majority of standard nonlinear crystals like BBO, LBO, BiBO or KTP for frequency doubling, tripling and quadrupling of the basic laser radiation can be obtained from inventory. Consumer-distinct Proportions and AR coatings can also be available at competitive charges.
We also gauge the here enhanced pulses�?temporal pulse form and spectral transmission capability. We Be certain that our products fulfill the requirements for OPCPA purposes.
The group velocities of the basic and second harmonic pulses can also be distinct, even when phase-matched, along with the magnitude of the team velocity mismatch relies on the crystal Attributes as well as the optical frequencies in the pulses.
Any scratches can degrade the optical efficiency of your crystal and most likely result in damage below high laser electricity. For stubborn stains, an answer of gentle detergent or isopropyl Alcoholic beverages can be Carefully applied to the crystal surface and after that rinsed off with distilled h2o.
Pumped through the fourth harmonic of a Nd:YAG laser (at 266nm), a tunable OPO with sign wavelength assortment amongst 422nm and 477nm has become observed by angle-tuning a type I BBO crystal. Pumped by a 1mJ, 80fs Dye laser at 615nm, the OPA with two BBO crystals yields more than fiftyµJ (utmost one hundred thirtyµJ),
The spectrally narrowed SHG pulse spectrum is claimed for being apodized, considering that an impact of the fundamental pulse exceeding the maximum enter bandwidth Restrict could be the removal of the highest and cheapest frequencies within the SHG pulse spectrum.
Here is the so-named oo-e arrangement, as the two photons from the basic are polarization-oriented together the common axis and the 2nd harmonic photon's polarization is while in the incredible plane.
When choosing a supplier, take into consideration factors such as the supplier’s practical experience, product high quality, customer service, and pricing. It’s also a smart idea to request a sample or perhaps a check report back to verify the quality of the crystals before making a purchase.