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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。

Which geometry, dopant and doping focus of your gain medium are most beneficial rely upon various variables. The offered pump supply (kind of laser diode or lamp) and also the envisaged pumping arrangement are important things, but the fabric itself also has some impact. By way of example, titanium–sapphire lasers ought to be pumped with significant intensities, for which the form of the transversely cooled rod, operated with rather modest pump and laser beam diameter, is more correct than e.

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。

激光晶体的损伤阈值与其能承受的最大光强有关，而不会遭受物理或结构损伤。高损伤阈值对于确保高功率激光应用的耐久性和长寿命至关重要。

The maximum probable doping focus can depend strongly about the host material and its fabrication strategy.

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。

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材料 激光晶体 晶体生长 光学性能 稀土离子 过渡族离子 materials laser crystal crystal progress optical general performance rare earth ions transition group ions 

In 2017, we created the earth’s biggest Ti∶sapphire crystal (Φ235 mm), which supported the 10 PW laser output of Shanghai Superintense Ultrafast Laser Facility. The event of Yb and Tm doped GdScO3 laser crystals with extremely vast emission spectra drives the click here event of laser diode pumped ultrafast good-condition lasers. With the increase in pulse Electricity, peak power, and repetition charge of reliable-condition lasers, laser crystals will establish to bigger sizes, larger crystal good quality, and controllable essential effectiveness.

It may be oriented for close to perpendicular incidence in the laser beam, or at Brewster's angle. It may be mounted in a few strong mount which also acts as being a heat sink. Bigger crystals are often used for aspect pumping e.g. with substantial-electrical 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。