Nonlinear Crystal Secrets
Nonlinear Crystal Secrets
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Laser modeling and simulation can be used to reliably figure out the ideal crystal Proportions, doping density And maybe values of additional parameters.
人造红宝石激光晶体是首次实现激光输出的材料。可用焰熔法、提拉法或助熔剂法生产单晶。用提拉法容易获得大尺寸优质晶体。
The host crystal is considerably more than simply a means to fix the laser-active ions at specified positions in Room. Many properties of the host materials are important:
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。
For quasi-three-degree laser attain media and even 3-amount obtain media, a person usually ought to Restrict the length to a value that's much too short for productive pump absorption, as reabsorption outcomes would if not spoil the overall performance. For side pumping, supplemental concerns come into Perform; Aside from productive pump absorption, it is crucial to get an appropriate spatial shape of your attain profile.
g. a thin disk. As An additional case in point, Q-switched lasers access a better population density from the upper laser amount and so are as a result a lot more delicate to quenching results and Electrical power transfer processes; hence, a decrease doping density is commonly appropriate for these products. For top-electricity lasers, decreased doping densities tend to be accustomed to Restrict the density of warmth generation, Even though thin-disk lasers perform finest with extremely doped crystals. Several laser solutions do not reach the total performance possible due to the fact these types of aspects haven't been thoroughly worked out.
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A higher damage threshold concerning pulse fluence or peak intensity could be important for prime-energy amplifiers.
作为工业上使用较多的都是高掺钇铝石榴石，也就是说掺入不同的元素来达到不同的效果；作为工业激光，关注以下性能：
Which geometry, dopant and doping focus from the achieve medium are most beneficial count on several elements. The obtainable pump supply (variety of laser diode or lamp) and also the envisaged pumping arrangement are very important factors, but the material by itself also has some affect. Such as, titanium–sapphire lasers ought to be pumped with higher check here intensities, for which the form of a transversely cooled rod, operated with comparatively smaller pump and laser beam diameter, is a lot more correct than e.
These tables incorporate only the most typical host crystals; numerous Many others exist, which can be fewer usually applied.
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Those surfaces which happen to be handed with the laser beam are Generally either oriented at Brewster's angle or have an anti-reflection coating.
Not surprisingly, it is rather desirable that a specified crystal good quality is created consistently, Whilst distinct laser designs may have a different sensitivity to content parameters.
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。
With That idea, 1 won't have to have an additional saturable absorber crystal, making sure that a person might make a lot more compact Q-switched laser setups with decrease inside parasitic losses. Having said that, unwelcome Unwanted effects may come about, for instance acquiring undesirable valence states in the concerned ions or Vitality transfers.
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Laser crystals are optical crystals �?generally solitary crystals (monocrystalline optical components) �?that happen to be applied as achieve media for reliable-condition lasers. Normally, They may be doped with either trivalent rare earth ions or changeover steel ions.
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。