Indicators on Laser Crystal You Should Know
Indicators on Laser Crystal You Should Know
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Laser modeling and simulation can be used to reliably determine the the best possible crystal dimensions, doping density And maybe values of added parameters.
The medium should have a substantial transparency (small absorption and scattering) in the wavelength regions of pump and laser radiation, and very good optical homogeneity. To some extent, this relies on the quality of the material, determined by facts of your fabrication procedure.
The host medium influences strongly the wavelength, bandwidth and changeover cross-sections of pump and laser transitions and likewise the higher-condition life time.
激光晶体由发光中心和基质晶体两部分组成。大部分激光晶体的发光中心由激活离子构成，激活离子部分取代基质晶体中的阳离子形成掺杂型激光晶体。激活离子成为基质晶体组分的一部分时，则构成自激活激光晶体。
The most feasible doping focus can depend strongly about the host material and its fabrication strategy.
g. a thin disk. As One more example, Q-switched lasers achieve the next population density from the upper laser level and are for that reason additional sensitive to quenching results and Electrical power transfer processes; for that reason, a lessen doping density is usually appropriate for these products. For high-electrical power lasers, decrease doping densities are often used to limit the density of warmth generation, Though slim-disk lasers do the job very best with very doped crystals. Quite a few laser products and solutions don't reach the total functionality opportunity because this kind of specifics have not been effectively worked out.
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A large damage threshold with regard to pulse fluence or peak intensity is often crucial for top-Vitality amplifiers.
These ions help the crystal to amplify mild within the laser wavelength through stimulated emission, when Electrical power is supplied to your crystal by way of absorption of pump gentle (�?optical pumping
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It may be oriented for around perpendicular incidence on the laser beam, or at Brewster's angle. It might be preset in certain solid mount which also functions to be a warmth sink. More substantial crystals usually are useful for facet pumping e.g. with significant-ability diode bars.
The commonest laser-Lively rare earth ions and host media together with some common emission wavelengths are shown in the next table:
A few laser crystal materials happen to be demonstrated where by some saturable absorber material is included for passive Q switching of the laser.
For many reasons, composite crystals are becoming popular. These have a spatially different chemical composition and will be produced with Unique styles.
There exists a wide range of crystalline media, that may be grouped according to important atomic constituents and crystalline structures. Some important teams of crystals are:
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It is apparent that diverse apps lead to quite different requirements on laser acquire media. For get more info that reason, a wide array of various crystals are made use of, and creating the best alternative is essential for constructing lasers with ideal performance.
激光晶体（laser crystal），可将外界提供的能量通过光学谐振腔转化为在空间和时间上相干的具有高度平行性和单色性激光的晶体材料。是晶体激光器的工作物质。