Facts About Laser Crystal Revealed
Facts About Laser Crystal Revealed
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The most typical laser-Lively rare earth ions and host media together with some usual emission wavelengths are demonstrated in the next table:
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。
Additionally, some versatility is missing in experiments if a person can not try out absorbers with distinct thickness or doping concentration, by way of example, with no exchanging the laser crystal by itself.
作为工业上使用较多的都是高掺钇铝石榴石，也就是说掺入不同的元素来达到不同的效果；作为工业激光，关注以下性能：
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A high area top quality is not surprisingly important. Specifications of surface area flatness are sometimes a lot better than . This can help in order to avoid the two scattering losses and wavefront distortions which could degrade the laser's beam good quality. Moreover, scratch and dig specs
g. a thin disk. As A further example, Q-switched lasers get to a higher inhabitants density within the upper laser degree and so are hence much more sensitive to quenching results and Electricity transfer procedures; hence, more info a lower doping density is often appropriate for these gadgets. For high-electrical power lasers, reduced doping densities are sometimes accustomed to Restrict the density of warmth era, While slim-disk lasers operate greatest with very doped crystals. Numerous laser goods do not get to the full performance opportunity mainly because this sort of details haven't been correctly labored out.
The host crystal is considerably more than simply a method to repair the laser-Lively ions at particular positions in Room. A variety of Attributes of your host materials are essential:
热膨胀和收缩系数对确定激光晶体的热透镜特性至关重要。最小化热透镜效应对于在广泛的操作温度范围内保持光束质量至关重要。
All those surfaces that happen to be passed via the laser beam are Generally either oriented at Brewster's angle or have an anti-reflection coating.
材料 激光晶体 晶体生长 光学性能 稀土离子 过渡族离子 products laser crystal crystal advancement optical functionality unusual earth ions transition group ions
The medium should have a significant transparency (minimal absorption and scattering) in the wavelength areas of pump and laser radiation, and great optical homogeneity. To some extent, this relies on the quality of the material, based on details on the fabrication system.
It could be oriented for in the vicinity of perpendicular incidence of the laser beam, or at Brewster's angle. It can be fixed in certain good mount which also functions for a heat sink. Greater crystals are frequently utilized for side pumping e.g. with high-power diode bars.
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。