5 Easy Facts About Laser Crystal Described
5 Easy Facts About Laser Crystal Described
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Laser modeling and simulation can be employed to reliably establish the the best possible crystal dimensions, doping density And perhaps values of added 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 medium influences strongly the wavelength, bandwidth and changeover cross-sections of pump and laser transitions and likewise the upper-condition life span.
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For quasi-a few-amount laser gain media and even 3-degree achieve media, 1 generally ought to Restrict the length to a price which can be far too small for successful pump absorption, as reabsorption consequences would otherwise spoil the functionality. For facet pumping, further issues come into play; Apart from efficient pump absorption, it is vital to obtain an acceptable spatial form on the attain profile.
g. a skinny disk. As A further case in point, Q-switched lasers arrive at the next inhabitants density from the upper laser level and they are thus far more delicate to quenching results and Electricity transfer processes; hence, a lessen doping density is often appropriate for these units. For high-ability lasers, decreased doping densities in many cases are utilized to limit the density of heat generation, Even though slender-disk lasers function ideal with highly doped crystals. Lots of laser solutions tend not to reach the whole functionality possible because this kind of facts have not been properly worked out.
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Additionally, some flexibility is missing in experiments if one particular can not Check out absorbers with diverse thickness or doping concentration, read more by way of example, with out 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 concentration with the acquire medium are most advantageous rely upon several variables. The offered pump resource (type of laser diode or lamp) and also the envisaged pumping arrangement are essential variables, but the material itself also has some affect. Such as, titanium–sapphire lasers have to be pumped with high intensities, for which the shape of the transversely cooled rod, operated with comparatively modest pump and laser beam diameter, is more appropriate than e.
It might be oriented for close to perpendicular incidence of the laser beam, or at Brewster's angle. It can be fastened in a few solid mount which also functions as a warmth sink. Bigger crystals are frequently useful for side pumping e.g. with high-energy diode bars.
The most common laser-active scarce earth ions and host media together with some common emission wavelengths are proven in the subsequent desk:
People surfaces that are passed via the laser beam are Ordinarily both oriented at Brewster's angle or have an anti-reflection coating.
For different factors, composite crystals have become popular. These Have got a spatially varying chemical composition and can be built with Particular styles.
There is certainly an array of crystalline media, that may be grouped in accordance to big atomic constituents and crystalline buildings. Some important teams of crystals are:
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It is obvious that diverse programs produce extremely diverse requirements on laser attain media. This is why, a broad array of different crystals are used, and making the ideal alternative is important for constructing lasers with the best possible functionality.
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。