Laser Crystal - An Overview
Laser Crystal - An Overview
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Visible strong-condition lasers based on laser crystals are compact and lightweight. Lasers from deep crimson to blue happen to be documented. Specially, there were a great deal of stories on Pr3+ doped laser crystals, and continual wave lasers all over 490 nm are actually realized. Ti∶sapphire is the most crucial acquire crystal for ultrafast lasers. Superintense ultrafast lasers with peak energy starting from a number of hundred terawatts to ten petawatts have to have high-good quality and huge-sized Ti∶sapphire crystal. The origin of defect related optical absorption in Ti∶sapphire and the growth of huge-sized higher-good quality crystals are two important concerns that urgently need to be dealt with. In recent years, we analyzed the system of defect associated optical absorption in Ti∶sapphire theoretically, and grew significant-sized substantial-high-quality crystals via warmth Trade process. The key activating ions for 1 μm laser crystals are Nd3+ and Yb3+. Nd∶YAG may be the most widely utilized laser crystal. In recent years, we explored several new Nd3+ doped fluoride and oxide laser crystals, and solved the emission cross section challenge of Nd∶Lu3Al5O12. SIOM described a brand new type of laser crystal Yb∶GdScO3, of which the achieve bandwidth is about 85 nm. The typically utilized activation ions for 2 μm laser crystals are Tm3+ and Ho3+. Tm3+ is often right pumped by laser diode. Ho3+ has larger sized stimulated emission cross segment, and its emission wavelength is lengthier than two μm. We studied the growth, spectroscopy, and laser overall performance of Tm∶LiYF4, Tm∶LiLuF4, Ho∶LiYF4, Tm,Ho∶LiYF4, and Tm,Ho∶LiLuF4 crystals.
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激光晶体中活性离子的作用是什么？ 活性离子在激光晶体中负责通过受激发射产生激光光线。
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：
激光晶体由发光中心和基质晶体两部分组成。大部分激光晶体的发光中心由激活离子构成，激活离子部分取代基质晶体中的阳离子形成掺杂型激光晶体。激活离子成为基质晶体组分的一部分时，则构成自激活激光晶体。
A significant area good quality is needless to say critical. Specifications of area flatness are sometimes better than . This aids to stay away from equally scattering losses and wavefront distortions which can degrade the laser's beam good quality. Additionally, scratch and dig specs
g. a thin disk. As A further case in point, Q-switched lasers get to an increased inhabitants density in the upper laser level and therefore are as a result additional delicate to quenching results and Strength transfer processes; as a result, a decrease doping density is frequently suitable for these products. For prime-electric power lasers, lessen doping densities tend to be used to limit the density of warmth technology, Whilst slender-disk lasers do the job ideal with hugely doped crystals. A lot of laser products never get to the total efficiency possible because these types of facts have not been properly labored out.
The host crystal is a great deal more than just a means to repair the laser-Energetic ions at particular positions in space. Many Qualities from the host substance are important:
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。
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For various good reasons, composite crystals are becoming common. These Have a very spatially different chemical composition and will be created with Distinctive styles.
There is certainly an array of crystalline media, which can be more info grouped according to important atomic constituents and crystalline structures. Some significant teams 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。