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If the crystal surfaces remain “soiled�?after the above mentioned cleaning methods, the surfaces might need been weakened. You should Call us for rework of your crystals.
Inspect the crystal surface area for dust and stains by Keeping it in the vicinity of a bright seen-light-weight source. Viewing at distinctive angles can assist see scattering from dust and stains. The crystal floor has to be cleaned as explained underneath if dust and stains are located.
The level of the solvent is often adjusted for various crystal dimensions Therefore the lens tissue is saved damp for the whole drag but there is not any noticeable trace of solvent on the crystal area once the drag is finished. Inspect the surface area and repeat if needed, but only use Every single sheet of lens tissue once.
Also, it could be hugely fascinating to make use of a crystal substance which can be critically phase-matched at space temperature mainly because noncritical stage matching often entails the operation with the crystal in a very temperature-stabilized crystal oven. Having said that, the feasibility of critical period matching could be presented just for adequately high peak powers.
Even if the crystal content or coating is just not sensitive to drinking water, compact water droplets could aim laser more info radiation far more tightly than beneath regular operation, and so hurt the crystal product.
At this time, as A sort of excellent nonlinear 2nd harmonic crystal, it can be used to make large efficiency crystal of inexperienced or blue laser.
Operation of nonlinear crystals at temperatures down below area temperature (to realize section matching) is generally problematic, as it may well produce condensation of drinking water on the crystal surfaces if the surrounding air isn't really dry.
rystal surface area is horizontal and a little previously mentioned your fingers. Have a refreshing, clean up sheet of lens tissue and place it about the crystal. Be sure the lens tissue could be drawn throughout the crystal area. Future, area a small fall of pure isopropyl alcohol (IPA) on the lens tissue in addition to the crystal surface.
Abnormal optical intensities in the course of Procedure may possibly instantaneously injury a crystal. Sadly, nonlinear crystals normally have to be operated not considerably from their optical injury threshold to obtain a sufficiently significant conversion efficiency. This means a trade-off concerning conversion efficiency and crystal life time.
In many instances, a nonlinear crystal useful for nonlinear frequency conversion has an extremely lengthy life span, that's longer than that of The full laser system. The crystal content is actually not modified in the course of Procedure. However, a lowered crystal life time can manifest under a variety of situation:
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Optical crystals can exhibit different varieties of optical nonlinearities, which can be used in various strategies:
flux-developed KTP and RTP with its higher nonlinearity, also in variants with large grey tracking resistance