Detailed Notes on Laser Crystal
Detailed Notes on Laser Crystal
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Distinct crystalline materials are really distinct about their hardness and other Homes, which determine with which procedures and how simply they may be Reduce 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 changeover cross-sections of pump and laser transitions in addition to 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-amount laser get media as well as three-amount get media, one particular generally really should limit the duration to a price which can be as well small for productive pump absorption, as reabsorption effects would if not spoil the effectiveness. For side pumping, supplemental issues come into Enjoy; Apart from economical pump absorption, it is necessary to acquire an appropriate spatial condition in the gain profile.
g. a thin disk. As One more example, Q-switched lasers get to a higher populace density during the upper laser stage and are as a result extra sensitive to quenching outcomes and Electricity transfer processes; as a result, a lower doping density is frequently suitable for these gadgets. For prime-ability lasers, lower doping densities are frequently utilized to limit the density of warmth era, While slim-disk lasers do the job most effective with extremely doped crystals. A lot of laser solutions do not reach the complete effectiveness opportunity simply because this sort of information haven't been appropriately labored out.
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On top of that, some overall flexibility is misplaced in experiments if 1 simply cannot Check out absorbers with various thickness or doping focus, by way of example, without exchanging the laser crystal by itself.
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 gain medium are most beneficial count on a number of variables. The available pump source (style of laser diode or lamp) and the envisaged pumping arrangement are essential components, but the fabric itself also has some influence. By way of example, titanium–sapphire lasers should be pumped with high intensities, for which the form of a transversely cooled rod, operated with comparatively smaller pump and laser beam diameter, is a lot more appropriate than e.
It may be oriented for close to perpendicular incidence on the laser beam, or at Brewster's angle. It could be fastened in certain good mount which also functions to be a warmth sink. Larger crystals are often used for side pumping e.g. with higher-energy diode bars.
The most common laser-active scarce earth ions and host media together with some normal emission wavelengths are shown in the subsequent table:
Those surfaces which might be handed because of the laser beam are Ordinarily possibly oriented at Brewster's angle or have an anti-reflection coating.
Naturally, it's very appealing that a given crystal quality is produced regularly, Though distinct laser models can have a distinct sensitivity to 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。
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It is obvious that distinctive programs bring on pretty distinct prerequisites on laser acquire media. This is why, a wide range of different crystals are utilized, and generating the ideal decision is important for setting up lasers with optimum 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。