About Laser Crystal
About Laser Crystal
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Visible good-state lasers dependant on laser crystals are compact and lightweight. Lasers from deep red to blue have already been reported. Particularly, there were many experiences on Pr3+ doped laser crystals, and continual wave lasers close to 490 nm have been obtained. Ti∶sapphire is the most crucial obtain crystal for ultrafast lasers. Superintense ultrafast lasers with peak electrical power ranging from numerous hundred terawatts to ten petawatts require large-good quality and huge-sized Ti∶sapphire crystal. The origin of defect associated optical absorption in Ti∶sapphire and the growth of large-sized large-high quality crystals are two vital challenges that urgently should be resolved. In recent years, we analyzed the system of defect linked optical absorption in Ti∶sapphire theoretically, and grew significant-sized substantial-excellent crystals as a result of heat exchange technique. The key activating ions for 1 μm laser crystals are Nd3+ and Yb3+. Nd∶YAG will be the most widely used laser crystal. In recent years, we explored several new Nd3+ doped fluoride and oxide laser crystals, and solved the emission cross section trouble of Nd∶Lu3Al5O12. SIOM described a whole new kind of laser crystal Yb∶GdScO3, of which the gain bandwidth is about eighty five nm. The generally used activation ions for 2 μm laser crystals are Tm3+ and Ho3+. Tm3+ can be specifically pumped by laser diode. Ho3+ has bigger stimulated emission cross part, and its emission wavelength is for a longer time than 2 μm. We examined the growth, spectroscopy, and laser performance of Tm∶LiYF4, Tm∶LiLuF4, Ho∶LiYF4, Tm,Ho∶LiYF4, website and Tm,Ho∶LiLuF4 crystals.
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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On top of that, some flexibility is misplaced in experiments if a single are unable to Check out absorbers with different thickness or doping concentration, for instance, without the need of exchanging the laser crystal alone.
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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。
Certainly, it is vitally fascinating that a presented crystal high quality is produced regularly, Even though various laser designs might have a special sensitivity to material parameters.
g. a skinny disk. As another illustration, Q-switched lasers get to a higher populace density during the upper laser amount and they are for that reason far more delicate to quenching effects and Vitality transfer processes; consequently, a lower doping density is frequently suitable for these units. For high-energy lasers, reduced doping densities are frequently accustomed to Restrict the density of heat technology, Despite the fact that slender-disk lasers function finest with extremely doped crystals. Numerous laser items tend not to reach the entire efficiency possible for the reason that these types of facts have not been thoroughly worked out.
Several laser crystal materials are already shown in which some saturable absorber product is incorporated for passive Q switching of a laser.
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主体材料中活性离子掺杂物的数量是关键因素。它影响了激光的效率和性能。过低的浓度可能导致低输出，过高的浓度可能导致消光效应，降低晶体的效率。
The medium ought to have a substantial transparency (reduced absorption and scattering) during the wavelength areas of pump and laser radiation, and great optical homogeneity. To some extent, this relies on the caliber of the fabric, determined by facts from the fabrication system.
There is certainly a wide array of crystalline media, that may be grouped according to special atomic constituents and crystalline structures. Some vital 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。