What Does Laser Crystal Mean?
What Does Laser Crystal Mean?
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Laser modeling and simulation may be used to reliably identify the the best possible crystal dimensions, doping density And maybe values of further 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 transition cross-sections of pump and laser transitions as well as the upper-state lifetime.
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-stage laser obtain media or perhaps a few-stage obtain media, 1 often really should Restrict the length to a worth and that is way too brief for economical pump absorption, as reabsorption outcomes would in any other case spoil the performance. For aspect pumping, further considerations appear into Perform; Other than productive pump absorption, it's important to acquire a suitable spatial form from the get profile.
g. a skinny disk. As Yet another example, Q-switched lasers reach the next populace density within the upper laser stage and they are as a result extra sensitive to quenching results and Electricity transfer procedures; consequently, a decrease doping density is commonly appropriate for these gadgets. For prime-electric power lasers, lower doping densities are sometimes utilized to Restrict the density of warmth generation, Even though skinny-disk lasers get the job done most effective with very doped crystals. Several laser goods tend not to get to the total effectiveness possible because these kinds of aspects have not been correctly worked out.
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A high destruction threshold regarding pulse fluence or peak depth could be vital 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 with the achieve medium are most beneficial depend on quite a few aspects. The offered pump resource (type of laser diode or lamp) as well as envisaged pumping arrangement are important elements, but the material itself also has some impact. For example, titanium–sapphire lasers have to be pumped with higher intensities, for which the shape of a transversely cooled rod, operated with somewhat small pump and laser beam diameter, is a lot more appropriate than e.
It could be oriented for in close proximity to perpendicular incidence with the laser beam, or at Brewster's angle. It might be fastened in some strong mount which also functions being a warmth sink. Much larger crystals are frequently employed for side pumping e.g. with substantial-electricity diode bars.
The commonest laser-Lively uncommon earth ions and host media along with some normal emission wavelengths are shown in the next desk:
Those surfaces that are passed with the laser beam are Usually possibly oriented at Brewster's angle or have an anti-reflection coating.
Needless to say, it is vitally desirable that a given crystal top quality is produced continuously, Whilst different laser layouts can have a different sensitivity to click here content parameters.
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, a person would not will need a further saturable absorber crystal, so that a single may possibly make additional compact Q-switched laser setups with reduce internal parasitic losses. Nevertheless, undesired Unintended effects can also arise, for instance obtaining unwelcome valence states from the concerned ions or Electricity transfers.
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It is clear that various apps cause pretty different requirements on laser obtain media. Because of this, a wide range of different crystals are employed, and earning the appropriate decision is important for setting up lasers with the best possible 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。