The Laser Crystal Diaries
The Laser Crystal Diaries
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Noticeable sound-point out lasers based upon laser crystals are compact and lightweight. Lasers from deep crimson to blue are documented. Specially, there have been many reviews on Pr3+ doped laser crystals, and ongoing wave lasers close to 490 nm have been realized. Ti∶sapphire is the most crucial get crystal for ultrafast lasers. Superintense ultrafast lasers with peak ability ranging from numerous hundred terawatts to 10 petawatts require significant-excellent and enormous-sized Ti∶sapphire crystal. The origin of defect linked optical absorption in Ti∶sapphire and the growth of huge-sized large-excellent crystals are two crucial problems that urgently have to be addressed. In recent times, we analyzed the mechanism of defect similar optical absorption in Ti∶sapphire theoretically, and grew huge-sized superior-excellent crystals by way of heat exchange process. The most crucial activating ions for 1 μm laser crystals are Nd3+ and Yb3+. Nd∶YAG would be the most generally utilized laser crystal. In recent times, we explored a number of new Nd3+ doped fluoride and oxide laser crystals, and solved the emission cross area trouble of Nd∶Lu3Al5O12. SIOM described a different form of laser crystal Yb∶GdScO3, of which the achieve bandwidth is about 85 nm. The normally employed activation ions for 2 μm laser crystals are Tm3+ and Ho3+. Tm3+ is usually instantly pumped by laser diode. Ho3+ has larger sized stimulated emission cross part, and its emission wavelength is for a longer time than two μm. We studied The expansion, spectroscopy, and laser functionality of Tm∶LiYF4, Tm∶LiLuF4, Ho∶LiYF4, Tm,Ho∶LiYF4, 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。
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。
Furthermore, some flexibility is shed in experiments if 1 cannot try out absorbers with various thickness or doping focus, for example, with no exchanging the laser crystal 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：
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。
活性离子在激光晶体内发生的能量跃迁对激光操作至关重要。大多数激光操作都是通过四能级系统原理进行的，确保连续操作并防止浪费的非辐射衰变。
亚稳态寿命也起着重要作用。较长的寿命允许更多的储能和实现粒子数反转的更高潜力，这对激光动作至关重要。
A few laser crystal resources have been shown the place some saturable absorber materials is integrated for passive Q switching of the laser.
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。
For quasi-a few-level laser acquire media as well as 3-degree get media, a single frequently has to limit the duration to a value which can be too quick for economical pump absorption, as reabsorption consequences would usually spoil the functionality. For side pumping, extra considerations come into Engage in; Apart from successful pump absorption, it is vital to acquire a suitable spatial form from the attain profile.
材料 激光晶体 晶体生长 光学性能 稀土离子 过渡族离子 components laser crystal crystal advancement optical overall performance exceptional earth ions transition team ions
The medium must have a substantial transparency Laser Crystal (reduced absorption and scattering) while in the wavelength areas of pump and laser radiation, and very good optical homogeneity. To some extent, this depends on the quality of the material, determined by particulars with the fabrication course of action.
With That idea, 1 will not require an extra saturable absorber crystal, to make sure that one particular may perhaps make extra compact Q-switched laser setups with decrease internal parasitic losses. However, unwelcome Uncomfortable side effects can also take place, for example getting unwanted valence states on the associated ions or Strength 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。