About Laser Crystal
About Laser Crystal
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The most typical laser-Energetic unusual earth ions and host media together with some standard emission wavelengths are shown in the subsequent table:
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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。
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。
Which geometry, dopant and doping focus with the get medium are most beneficial rely on a number of factors. The obtainable pump resource (style of laser diode or lamp) and also the envisaged pumping arrangement are very important things, but the material itself also has some influence. By way of example, titanium–sapphire lasers must be pumped with substantial intensities, for which the shape of a transversely cooled rod, operated with reasonably compact pump and laser beam diameter, is more suitable than e.
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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。
g. a skinny disk. As A further case in point, Q-switched lasers reach a higher population density in the upper laser level and are consequently much more delicate to quenching outcomes and Power transfer procedures; thus, a lessen doping density is often appropriate for these equipment. For top-electric power lasers, decreased doping densities are frequently accustomed to limit the density of warmth generation, Even though slim-disk lasers perform best with remarkably doped crystals. Several laser items will not get to the full general performance potential since these kinds of details have not been properly worked out.
激光晶体的效率在很大程度上依赖于某些属性，这些属性不仅限于其基本组成。这些特性决定了产生的激光光束的质量和随后的应用。
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-three-stage laser obtain click here media and even 3-stage obtain media, a person normally has to Restrict the size to a worth which is as well limited for effective pump absorption, as reabsorption outcomes would normally spoil the effectiveness. For aspect pumping, more considerations occur into Enjoy; Moreover productive pump absorption, it is vital to obtain an appropriate spatial condition with the obtain profile.
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The medium ought to have a significant transparency (lower absorption and scattering) while in the wavelength areas of pump and laser radiation, and great optical homogeneity. To some extent, this will depend on the caliber of the material, based on information in the fabrication procedure.
You can find an array of crystalline media, which may be grouped in accordance to important atomic constituents and crystalline structures. Some significant teams of crystals are:
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。