The smart Trick of Laser Crystal That No One is Discussing
The smart Trick of Laser Crystal That No One is Discussing
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The most typical laser-active uncommon earth ions and host media together with some common emission wavelengths are shown in the subsequent desk:
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Which geometry, dopant and doping concentration on the gain medium are most beneficial count on numerous elements. The readily available pump resource (kind of laser diode or lamp) as well as envisaged pumping arrangement are very important factors, but the material alone also has some impact. One example is, titanium–sapphire lasers should be pumped with substantial intensities, for which the form of the transversely cooled rod, operated with relatively smaller pump and laser beam diameter, is more proper than e.
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A large floor high-quality is needless to say critical. Technical specs of area flatness tend to be better than . This aids to stop both of those scattering losses and wavefront distortions which may degrade the laser's beam top quality. Moreover, scratch and dig requirements
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。
The host crystal is considerably more than simply a method to repair the laser-active ions at particular positions in Area. Quite a few Houses of the host materials are essential:
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-three-level laser attain media or maybe three-amount gain media, a person normally should Restrict the size to a worth which can be much too small for productive pump absorption, as reabsorption consequences would in any other case spoil the performance. For aspect pumping, more concerns arrive into Enjoy; In addition to productive pump absorption, it can be crucial to obtain a suitable spatial condition of your acquire 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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It might be oriented for in the vicinity of perpendicular incidence of the laser beam, or at Brewster's angle. It can be fixed in some good mount which also functions for a warmth sink. Much larger crystals are usually useful for aspect pumping e.g. with large-power diode bars.
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