The smart Trick of Laser Crystal That Nobody is Discussing
The smart Trick of Laser Crystal That Nobody is Discussing
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Laser modeling and simulation can be used to reliably ascertain the ideal crystal dimensions, doping density and possibly values of more parameters.
The medium must have a large transparency (low absorption and scattering) within the wavelength regions of pump and laser radiation, and good optical homogeneity. To some extent, this is dependent upon the quality of the fabric, determined by aspects in the fabrication approach.
The host medium influences strongly the wavelength, bandwidth and changeover cross-sections of pump and laser transitions as well as the higher-point out life span.
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-amount laser gain media or maybe a few-level obtain media, just one often has to limit the size to a worth that is also small for productive pump absorption, as reabsorption effects would in any other case spoil the efficiency. For facet pumping, supplemental considerations occur into Participate in; Moreover effective pump absorption, it can be crucial to get a suitable spatial condition in the get profile.
g. a thin disk. As An additional instance, Q-switched lasers arrive at a better inhabitants density from the upper laser amount and are therefore much more delicate to quenching consequences and Electricity transfer processes; hence, a decrease doping density is often suitable for these devices. For top-electrical power lasers, lower doping densities will often be used to Restrict the density of heat era, Even though slim-disk lasers perform greatest with highly doped crystals. A lot of laser items never reach the complete effectiveness likely since these types of information have not been effectively worked out.
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A superior destruction threshold concerning pulse fluence or peak depth might be important for prime-Electrical power 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 concentration on the obtain medium are most beneficial depend upon a number of variables. The accessible pump source (sort of laser diode or lamp) as well as envisaged pumping arrangement are crucial variables, but the material itself also has some influence. One example is, titanium–sapphire lasers ought to be pumped with large intensities, for which the form of a transversely cooled rod, operated with somewhat compact pump and laser beam diameter, is more ideal than e.
These tables consist of only the commonest host crystals; quite a few Many others exist, which might be significantly less often used.
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All those surfaces which happen to be handed with the laser beam are normally both oriented at Brewster's angle or have an anti-reflection coating.
For numerous good reasons, composite crystals are becoming common. These have a spatially various chemical composition and might be made with Specific styles.
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, one doesn't need to have yet another saturable absorber crystal, in order that one particular may possibly make additional compact Q-switched laser setups with decreased inside parasitic losses. Having said that, unwelcome Unwanted side effects might also happen, like obtaining unwelcome valence states of your included ions or Strength transfers.
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Laser crystals are optical crystals �?typically solitary crystals (monocrystalline optical products) �?that are applied as gain media for sound-point out lasers. In most cases, They may be doped with possibly trivalent rare earth ions or transition 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。