Laser Crystal - An Overview
Laser Crystal - An Overview
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Diverse crystalline supplies are very distinctive relating to their hardness together with other Houses, which decide with which methods and how easily they may be cut and polished with high quality.
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 medium influences strongly the wavelength, bandwidth and transition 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。
For quasi-three-stage laser acquire media and even 3-amount obtain media, 1 generally really should Restrict the duration to a worth which can be as well small for efficient pump absorption, as reabsorption consequences would otherwise spoil the overall performance. For facet pumping, added issues arrive into Enjoy; besides successful pump absorption, it's important to get an acceptable spatial form on the acquire profile.
g. a skinny disk. As Yet another example, Q-switched lasers reach a better inhabitants density inside the higher laser level and they are consequently additional sensitive to quenching results and Vitality transfer processes; for that reason, a reduced doping density is usually appropriate for these devices. For top-electrical power lasers, lower doping densities are often accustomed to limit the density of heat generation, Even though thin-disk lasers do the job best with really doped crystals. Several laser solutions don't reach the entire functionality possible mainly because such information haven't been appropriately labored out.
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A significant damage threshold regarding pulse fluence or peak intensity can be important for prime-energy amplifiers.
These ions allow the crystal to amplify mild in the laser wavelength by way of stimulated emission, when Vitality is supplied towards the crystal by using absorption of pump gentle (�?optical pumping
Which geometry, dopant and doping concentration of the get medium are most advantageous depend upon quite a few aspects. The accessible pump resource (style of laser diode or lamp) along with the envisaged pumping arrangement are very important factors, but the fabric itself also has some affect. By way of example, titanium–sapphire lasers must be pumped with higher intensities, for which the form of a transversely cooled rod, operated with rather tiny pump and laser beam diameter, is much more correct than e.
These tables incorporate only the commonest host crystals; numerous Other people exist, which can be much less often click here used.
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Some laser crystal materials have already been demonstrated where by some saturable absorber content is integrated for passive Q switching of a laser.
Needless to say, it is rather attractive that a specified crystal top quality is manufactured constantly, Even though diverse laser models may have another sensitivity to content parameters.
There is certainly a variety of crystalline media, which can be grouped according to important atomic constituents and crystalline constructions. Some vital teams of crystals are:
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Laser crystals are optical crystals �?typically single crystals (monocrystalline optical supplies) �?that happen to be utilised as get media for stable-condition lasers. Usually, They can be doped with either trivalent uncommon earth ions or transition metallic 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。