Facts About Laser Crystal Revealed
Facts About Laser Crystal Revealed
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Visible solid-condition lasers based upon laser crystals are compact and light-weight. Lasers from deep red to blue have been noted. Especially, there have been lots of experiences on Pr3+ doped laser crystals, and constant wave lasers around 490 nm are attained. Ti∶sapphire is the primary achieve crystal for ultrafast lasers. Superintense ultrafast lasers with peak electrical power starting from quite a few hundred terawatts to 10 petawatts demand high-high quality and enormous-sized Ti∶sapphire crystal. The origin of defect associated optical absorption in Ti∶sapphire and The expansion of large-sized high-high-quality crystals are two vital challenges that urgently need to be tackled. Lately, we analyzed the mechanism of defect similar optical absorption in Ti∶sapphire theoretically, and grew large-sized significant-high quality crystals by way of heat Trade strategy. The key activating ions for one μm laser crystals are Nd3+ and Yb3+. Nd∶YAG is the most generally made use of laser crystal. Recently, we explored quite a few new Nd3+ doped fluoride and oxide laser crystals, and solved the emission cross segment dilemma of Nd∶Lu3Al5O12. SIOM described a whole new variety of laser crystal Yb∶GdScO3, of which the get bandwidth is about 85 nm. The normally utilized activation ions for here two μm laser crystals are Tm3+ and Ho3+. Tm3+ could be instantly pumped by laser diode. Ho3+ has much larger stimulated emission cross segment, and its emission wavelength is extended than 2 μm. We analyzed the growth, spectroscopy, and laser performance 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。
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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。
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。
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。
The most attainable doping focus can rely strongly on the host substance and its fabrication method.
A couple of laser crystal components have been shown in which some saturable absorber content is incorporated for passive Q switching of the laser.
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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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 should have a superior transparency (lower absorption and scattering) inside the wavelength locations of pump and laser radiation, and excellent optical homogeneity. To some extent, this depends on the caliber of the fabric, determined by facts in the fabrication system.
There is certainly a wide array of crystalline media, which may be grouped in accordance to special atomic constituents and crystalline constructions. Some significant teams of crystals are:
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