Laser Crystal - An Overview

Laser Crystal - An Overview

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The most typical laser-Energetic rare earth ions and host media together with some common emission wavelengths are demonstrated in the subsequent desk:

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。

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。

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Which geometry, dopant and doping concentration from the acquire medium are most beneficial rely on several components. The offered pump resource (type of laser diode or lamp) and the envisaged pumping arrangement are important aspects, but the material itself also has some impact. One example is, titanium–sapphire lasers need to be pumped with superior intensities, for which the shape of a transversely cooled rod, operated with comparatively small pump and laser beam diameter, is more proper than e.

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。

A high surface area good quality is certainly essential. Requirements of area flatness will often be a lot better than . This helps to avoid both equally scattering losses and wavefront distortions which can degrade the laser's beam high quality. Additionally, scratch and dig technical specs

g. a thin disk. As A different instance, Q-switched lasers get to the next inhabitants density while in the upper laser stage and so are hence a lot more delicate to quenching effects and Vitality transfer processes; consequently, a reduced doping density is usually appropriate for these gadgets. For top-energy lasers, reduce doping densities are frequently accustomed to limit the density of heat technology, Whilst slender-disk lasers do the job most effective with remarkably doped crystals. Several laser items usually do not reach the complete overall performance possible simply because this kind of details haven't been adequately worked out.

A few laser crystal products are demonstrated in which some saturable absorber material is included 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-3-amount laser gain media as well as a few-amount gain media, a single generally really should limit the length to a value that's far too short for productive pump absorption, as reabsorption outcomes would if not spoil the performance. For aspect pumping, added criteria occur into play; In addition to effective pump absorption, it is vital to get an appropriate spatial shape from the acquire profile.

Distinct crystalline supplies are very distinct relating to their hardness as well as other Attributes, which establish with which techniques And exactly how very easily they may be Lower and polished with top quality.

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With that concept, one won't need to have an additional saturable absorber crystal, to make sure that one particular may make additional compact Q-switched laser setups with reduced interior parasitic losses. Even so, unwanted Unintended effects may additionally happen, for instance obtaining undesired valence states from the associated ions or Power transfers.

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。