Laser Crystal - An Overview
Laser Crystal - An Overview
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The most common laser-Lively exceptional earth ions and host media together with some standard emission wavelengths are revealed in the next table:
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Laser crystals are optical crystals �?generally single crystals (monocrystalline optical elements) �?which happen to be made use of as attain media for stable-state lasers. In most cases, They're doped with possibly trivalent uncommon earth ions or changeover metal ions.
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 and likewise the higher-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。
A substantial floor high quality is naturally important. Requirements of surface flatness tend to be much better than . This allows to prevent each scattering losses and wavefront distortions which could degrade the laser's beam excellent. On top of that, scratch and dig specifications
g. a skinny disk. As another instance, Q-switched lasers arrive at a better populace density while in the higher laser degree and therefore are as a result a lot more delicate to quenching outcomes and energy transfer procedures; consequently, a decreased doping density is often suitable for these gadgets. For prime-ability lasers, reduce doping densities will often be used to limit the density of warmth era, Even though skinny-disk lasers operate finest with hugely doped crystals. A lot of laser solutions do not reach the total performance prospective due to the fact these types check here of aspects haven't been appropriately worked out.
Some laser crystal supplies have been demonstrated where some saturable absorber materials is included 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。
It is clear that different purposes produce extremely diverse demands on laser obtain media. Due to this, a broad vary of different crystals are utilised, and producing the proper preference is essential for setting up lasers with the best possible effectiveness.
材料 激光晶体 晶体生长 光学性能 稀土离子 过渡族离子 products laser crystal crystal growth optical functionality uncommon earth ions changeover team ions
For different factors, composite crystals are getting to be popular. These Have a very spatially different chemical composition and can be manufactured with special designs.
It may be oriented for in close proximity to perpendicular incidence of the laser beam, or at Brewster's angle. It could be fixed in a few reliable mount which also functions as being a warmth sink. Greater crystals are often used for side pumping e.g. with large-electrical power diode bars.
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