The Laser Crystal Diaries
The Laser Crystal Diaries
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Visible solid-state lasers depending on laser crystals are compact and light-weight. Lasers from deep crimson to blue are actually claimed. Especially, there have been loads of experiences on Pr3+ doped laser crystals, and steady wave lasers close to 490 nm are already reached. Ti∶sapphire is the most crucial get crystal for ultrafast lasers. Superintense ultrafast lasers with peak power ranging from quite a few hundred terawatts to 10 petawatts need significant-excellent and large-sized Ti∶sapphire crystal. The origin of defect similar optical absorption in Ti∶sapphire and The expansion of large-sized substantial-high quality crystals are two vital troubles that urgently must be tackled. Lately, we analyzed the system of defect relevant optical absorption in Ti∶sapphire theoretically, and grew substantial-sized superior-good quality crystals by warmth exchange method. The main activating ions for 1 μm laser crystals are Nd3+ and Yb3+. Nd∶YAG is definitely the most widely made use of laser crystal. Lately, we explored a number of new Nd3+ doped fluoride and oxide laser crystals, and solved the emission cross part challenge of Nd∶Lu3Al5O12. SIOM reported a whole new kind of laser crystal Yb∶GdScO3, of which the attain bandwidth is about 85 nm. The typically employed activation ions for 2 μm laser crystals are Tm3+ and Ho3+. Tm3+ could be straight pumped by laser diode. Ho3+ has larger stimulated emission cross section, and its emission wavelength is more time than two μm. We examined the growth, spectroscopy, and laser general performance of Tm∶LiYF4, Tm∶LiLuF4, Ho∶LiYF4, Tm,Ho∶LiYF4, and Tm,Ho∶LiLuF4 crystals.
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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。
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。
The host medium influences strongly the wavelength, bandwidth and changeover cross-sections of pump and laser transitions and also the higher-point out lifetime.
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。
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 attainable doping focus can count strongly around the host content and its fabrication system.
Laser modeling and simulation can be used to reliably identify the ideal crystal dimensions, doping density And maybe values of added parameters.
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For quasi-three-level laser achieve media or maybe a few-amount gain media, 1 usually should Restrict the size to a price and that is much too short for efficient pump absorption, as reabsorption effects would or else spoil the efficiency. For side pumping, further factors arrive into Perform; Apart from effective pump absorption, it's important to obtain an acceptable spatial condition with the achieve profile.
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。
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You can find an array of crystalline media, which may be grouped according to important atomic constituents and crystalline constructions. Some critical groups of crystals are:
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