Nonlinear Crystal - An Overview
Nonlinear Crystal - An Overview
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Laser modeling and simulation can be employed to reliably determine the the best possible crystal Proportions, doping density And perhaps values of supplemental 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 crystal is considerably more than just a method to fix the laser-Energetic ions at particular positions in Area. Numerous Attributes with the host materials are very important:
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 attain media or even three-stage obtain media, one particular typically should limit the length to a worth which is much too small for effective pump absorption, as reabsorption outcomes would or else spoil the effectiveness. For aspect pumping, further considerations arrive into play; Apart from efficient pump absorption, it is important to obtain a suitable spatial shape of your obtain profile.
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Furthermore, some adaptability is dropped in experiments if just one are unable to Check out absorbers with different thickness or doping focus, one example is, without exchanging the laser crystal itself.
These ions empower the crystal to amplify light-weight with the laser wavelength by using stimulated emission, when Vitality get more info is equipped towards the crystal through absorption of pump light-weight (�?optical pumping
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It may be oriented for close to perpendicular incidence on the laser beam, or at Brewster's angle. It could be preset in certain solid mount which also acts as being a heat sink. Greater crystals are frequently employed for aspect pumping e.g. with significant-ability diode bars.
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Individuals surfaces which are passed by the laser beam are Generally either oriented at Brewster's angle or have an anti-reflection coating.
Needless to say, it's very desirable that a provided crystal excellent is produced constantly, While distinctive laser styles may have a unique sensitivity to product parameters.
There's an array of crystalline media, which may be grouped according to special atomic constituents and crystalline constructions. Some significant teams of crystals are:
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Laser crystals are optical crystals �?ordinarily single crystals (monocrystalline optical elements) �?that are applied as gain media for sound-point out lasers. Generally, They can be 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。