Laser Crystal - An Overview
Laser Crystal - An Overview
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Unique crystalline supplies are incredibly different regarding their hardness and various properties, which decide with which methods And just how simply they are often Lower and polished with high quality.
The medium ought to have a higher transparency (very low absorption and scattering) in the wavelength locations of pump and laser radiation, and excellent optical homogeneity. To some extent, this depends on the quality of the fabric, determined by particulars in the fabrication process.
The host medium influences strongly the wavelength, bandwidth and transition 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-three-level laser obtain media or simply three-amount attain media, just one generally has to limit the duration to a price and that is far too quick for economical pump absorption, as reabsorption outcomes would or else spoil the effectiveness. For aspect pumping, added criteria appear into Perform; In addition to successful pump absorption, it is crucial to acquire an acceptable spatial form from the get profile.
g. a skinny disk. As Yet another case in point, Q-switched lasers achieve an increased population density from the upper laser degree and they are therefore far more delicate to quenching effects and Strength transfer procedures; therefore, a reduced doping density is commonly suitable for these gadgets. For high-energy lasers, lessen doping densities are sometimes utilized to Restrict the density of warmth generation, Though slim-disk lasers get the job done best with very doped crystals. A lot of laser solutions never reach the full functionality probable for the reason that such particulars have not been correctly worked out.
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A higher problems threshold with regards to pulse fluence or peak depth may be vital for high-Electricity amplifiers.
These ions allow the crystal to amplify light-weight in the laser wavelength by means of stimulated emission, when Power is provided to the crystal through absorption of pump light-weight (�?optical pumping
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These tables incorporate only the most typical host crystals; several Other folks exist, that happen to be considerably less regularly employed.
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A handful of laser crystal components are demonstrated wherever some saturable absorber material is integrated for passive Q switching of the laser.
For different explanations, composite crystals have become well known. These have a spatially various chemical composition and click here will be made with Specific styles.
There is a wide range of crystalline media, which may be grouped according to special atomic constituents and crystalline constructions. Some critical teams of crystals are:
With that concept, one particular won't will need yet another saturable absorber crystal, to make sure that one may make more compact Q-switched laser setups with lower interior parasitic losses. However, unwelcome Unwanted side effects might also happen, such as getting undesired valence states on the concerned ions or Power transfers.
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Laser crystals are optical crystals �?typically solitary crystals (monocrystalline optical products) �?which can be applied as gain media for reliable-point out lasers. In most cases, These are 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。