About Laser Crystal
About Laser Crystal
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激光晶体的极化性能可能会影响输出激光束的质量和特性。有些激光晶体产生线性偏振光，这对某些应用可能有益。
Laser crystals are optical crystals �?typically single crystals (monocrystalline optical components) �?which happen to be used as gain media for good-condition lasers. Normally, they are doped with either trivalent unusual earth ions or changeover steel ions.
Furthermore, some adaptability is dropped in experiments if one particular are unable to Check out absorbers with distinct thickness or doping concentration, for instance, with out exchanging the laser crystal itself.
The host medium influences strongly the wavelength, bandwidth and changeover cross-sections of pump and laser transitions and in addition the higher-point out lifetime.
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A significant area high quality is naturally vital. Specifications of surface flatness are frequently a lot better than . This can help in order to avoid both equally scattering losses and wavefront distortions that may degrade the laser's beam high quality. Furthermore, scratch and dig specs
g. a thin disk. As A further instance, Q-switched lasers arrive at a greater populace density in the upper laser stage and they are therefore a lot more delicate to quenching outcomes and Power transfer processes; thus, a lessen doping density is frequently suitable for these products. For top-energy lasers, reduced doping densities in many cases are accustomed to Restrict the density of heat era, Though skinny-disk lasers perform greatest with very doped crystals. Several laser items don't get to the whole effectiveness probable for the reason that these kinds of specifics haven't been effectively worked out.
Laser modeling and simulation may be used to reliably decide the the best possible crystal dimensions, doping density And perhaps values of extra parameters.
量子效率是发射光子数量与吸收光子数量的比率。高量子效率表明更大部分吸收能量被转化为激光光束，有助于提高激光的整体效率。
For quasi-three-amount laser achieve media or perhaps a few-degree attain media, one particular frequently really should Restrict the duration to a price which is far too brief for successful pump absorption, as reabsorption effects would usually spoil the overall performance. For aspect pumping, additional factors occur into play; Aside from economical pump absorption, it is crucial to acquire an acceptable spatial shape from the obtain profile.
主体材料中活性离子掺杂物的数量是关键因素。它影响了激光的效率和性能。过低的浓度可能导致低输出，过高的浓度可能导致消光效应，降低晶体的效率。
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There's an array of crystalline media, which can be grouped in accordance to big atomic constituents and crystalline structures. Some essential groups of crystals are:
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