About Laser Crystal

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

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激光晶体是固态激光器的核心。它们是光放大发生的媒介，产生激光束。在这篇全面指南中，我们深入探讨激光晶体的世界。

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。

The host medium influences strongly the wavelength, bandwidth and changeover cross-sections of pump and laser transitions in addition to the upper-state life time.

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 concentration can rely strongly around the host content and its fabrication process.

The host crystal is a great deal more than just a method to repair the laser-Energetic ions at selected positions in Place. A number of Houses of the host substance are very 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。

For quasi-a few-degree laser achieve media or even a few-degree obtain media, 1 frequently ought to limit the duration to a value which happens to be also short for efficient pump absorption, as reabsorption consequences would usually spoil the overall performance. For aspect pumping, supplemental issues arrive into play; Apart from successful pump absorption, it is vital to obtain an appropriate spatial more info form from the achieve profile.

Unique crystalline components are quite unique relating to their hardness together with other Homes, which decide with which procedures And exactly how quickly they can be Minimize and polished with high quality.

For many explanations, composite crystals have become well-known. These Use a spatially varying chemical composition and can be produced with Unique shapes.

With that concept, just one will not need a further saturable absorber crystal, so that one could make much more compact Q-switched laser setups with lessen inside parasitic losses. Nevertheless, unwanted Unwanted side effects could also take place, which include obtaining unwanted valence states with the concerned ions or Power transfers.

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。