What Does Laser Crystal Mean?
What Does Laser Crystal Mean?
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Laser modeling and simulation can be employed to reliably establish the ideal crystal Proportions, doping density And maybe values of additional parameters.
The medium should have a high transparency (low absorption and scattering) during the wavelength regions of pump and laser radiation, and good optical homogeneity. To some extent, this is determined by the quality of the material, based on aspects of the fabrication procedure.
The host crystal is far more than just a means to fix the laser-active ions at particular positions in House. Many Houses in the host product are very 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-a few-level laser get media as well as a few-level get media, one normally must limit the size to a worth which is way too quick for economical pump absorption, as reabsorption effects would otherwise spoil the general performance. For aspect pumping, additional considerations come into Enjoy; Apart from productive pump absorption, it can be crucial to obtain an appropriate spatial shape in the acquire profile.
g. a thin disk. As Yet another case in point, Q-switched lasers arrive at a higher populace density inside the upper laser stage and therefore are hence additional delicate to quenching outcomes and Electricity transfer procedures; therefore, a lessen doping density is often appropriate for these units. For high-energy lasers, reduced doping densities are frequently used to limit the density of heat generation, Though slender-disk lasers operate very best with hugely doped crystals. Several laser items usually do not reach the whole general performance probable due to the fact these types of details have not been adequately labored out.
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On top of that, some versatility is misplaced in experiments if a single are unable to Check out absorbers with unique thickness or doping focus, one example is, without exchanging the laser crystal alone.
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 obtain medium are most beneficial count on quite a few factors. The out there pump source (sort of laser diode or lamp) as well as envisaged pumping arrangement are essential aspects, but the fabric alone also has some affect. Such as, titanium–sapphire lasers have to be Nonlinear Crystal pumped with higher intensities, for which the form of the transversely cooled rod, operated with relatively tiny pump and laser beam diameter, is much more ideal than e.
These tables comprise only the commonest host crystals; numerous others exist, which happen to be much less frequently used.
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Several laser crystal resources are actually demonstrated wherever some saturable absorber materials is included for passive Q switching of the laser.
For different motives, composite crystals are getting to be popular. These Use a spatially various chemical composition and will be designed with Exclusive designs.
You can find an array of crystalline media, which may be grouped in accordance to big atomic constituents and crystalline constructions. Some vital groups of crystals are:
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It is obvious that different programs produce really diverse needs on laser acquire media. This is why, a wide range of different crystals are utilised, and earning the proper alternative is important for constructing lasers with ideal overall 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。