About Laser Crystal
About Laser Crystal
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The most typical laser-Energetic scarce earth ions and host media together with some standard emission wavelengths are demonstrated in the subsequent desk:
These ions help the crystal to amplify light-weight on the laser wavelength by way of stimulated emission, when Electricity is provided on the crystal by way of absorption of pump light-weight (�?optical pumping
为了使激光器有效运作，需要有效管理运行过程中产生的热量。具有良好热导率的激光晶体可以更有效地散热，防止热透镜效应或断裂。
In addition, some versatility is lost in experiments if a person are unable to try out absorbers with unique thickness or doping concentration, for instance, without the need of exchanging the laser crystal itself.
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Naturally, it is very desirable that a offered crystal top quality is developed continually, While unique laser layouts might have a unique sensitivity to substance parameters.
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。
The host crystal is a lot more than just a method to fix the laser-Lively ions at sure positions in space. Numerous Houses from the host substance are crucial:
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 attain media or even three-degree gain media, 1 usually should Restrict the duration to a value which happens to be as well small for effective pump absorption, as reabsorption results would otherwise spoil the functionality. For facet pumping, extra concerns arrive into Participate in; besides effective pump absorption, it is necessary to get an appropriate spatial form on the acquire profile.
Diverse crystalline resources are incredibly various concerning their hardness as well as other website Attributes, which ascertain with which approaches and how conveniently they are often cut and polished with high quality.
The medium must have a high transparency (low absorption and scattering) in the wavelength locations of pump and laser radiation, and very good optical homogeneity. To some extent, this is dependent upon the standard of the material, determined by aspects of your fabrication approach.
You can find a wide array of crystalline media, that may be grouped according to special atomic constituents and crystalline buildings. Some important groups of crystals are:
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。