Laser Crystal Secrets
Laser Crystal Secrets
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These tables contain only the most typical host crystals; many Some others exist, which might be significantly less routinely employed.
激光晶体的极化性能可能会影响输出激光束的质量和特性。有些激光晶体产生线性偏振光，这对某些应用可能有益。
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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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晶体的光学质量对激光器的有效运行至关重要。晶体中的缺陷或杂质可能导致光散射、吸收甚至损坏晶体。高光学质量确保了稳定和高质量的激光束。
活性离子在激光晶体内发生的能量跃迁对激光操作至关重要。大多数激光操作都是通过四能级系统原理进行的，确保连续操作并防止浪费的非辐射衰变。
亚稳态寿命也起着重要作用。较长的寿命允许更多的储能和实现粒子数反转的更高潜力，这对激光动作至关重要。
A number of laser crystal supplies happen to be shown in which some saturable absorber product is incorporated for passive Q switching of a laser.
量子效率是发射光子数量与吸收光子数量的比率。高量子效率表明更大部分吸收能量被转化为激光光束，有助于提高激光的整体效率。
For quasi-a few-stage laser obtain media or perhaps a few-stage acquire media, one normally should limit the size to a value and that is also short for economical pump absorption, as reabsorption results would in any other case spoil the performance. For aspect pumping, more concerns arrive into Enjoy; besides productive pump absorption, it can be crucial to acquire a suitable spatial shape in the achieve profile.
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The medium must have a high transparency (very low absorption and scattering) in the wavelength locations of pump and laser radiation, and excellent optical homogeneity. To some extent, this depends upon the standard of the material, based on specifics of the fabrication approach.
With That idea, a person would not have to have yet another saturable absorber crystal, making sure that just one may possibly make a lot more compact Q-switched laser setups with reduce internal parasitic losses. On the other hand, unwanted Unwanted effects may manifest, such as acquiring undesirable get more info valence states from the involved ions or Vitality transfers.
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。