About Laser Crystal
About Laser Crystal
Blog Article
The most typical laser-active exceptional earth ions and host media along with some typical emission wavelengths are proven in the next desk:
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。
On top of that, some versatility is dropped in experiments if just one cannot try out absorbers with various thickness or doping concentration, as an example, with no exchanging the laser crystal by itself.
Which geometry, dopant and doping focus with the attain medium are most beneficial depend upon numerous things. The available pump resource (style of laser diode or lamp) along with the envisaged pumping arrangement are essential elements, but the fabric by itself also has some influence. Such as, titanium–sapphire lasers should be pumped with large intensities, for which the shape of a transversely cooled rod, operated with rather smaller pump and laser beam diameter, is more acceptable than e.
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。
Certainly, it is very attractive that a specified crystal quality is manufactured regularly, although distinctive laser types can have another sensitivity to content parameters.
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。
Laser modeling and simulation can be used to reliably ascertain the the best possible crystal dimensions, doping density And perhaps values of additional parameters.
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For quasi-a few-degree laser gain media or maybe three-amount obtain media, a person typically must Restrict the size to a value that's too small for effective pump absorption, as reabsorption outcomes would or else spoil the effectiveness. For facet pumping, extra things to consider occur into Perform; Aside from successful pump absorption, it is important to obtain a suitable spatial shape in the achieve 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 expansion optical general performance rare website earth ions transition group ions
The medium must have a high transparency (very low absorption and scattering) inside the wavelength locations of pump and laser radiation, and excellent optical homogeneity. To some extent, this depends upon the caliber of the fabric, determined by facts from the fabrication course of action.
With that concept, 1 doesn't have to have yet another saturable absorber crystal, so that one particular could make much more compact Q-switched laser setups with reduce internal parasitic losses. However, undesirable Unwanted effects might also come about, for instance getting unwanted valence states of the involved ions or Electricity transfers.
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