5 Easy Facts About Nonlinear Crystal Described
5 Easy Facts About Nonlinear Crystal Described
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Laser modeling and simulation can be employed to reliably decide the optimum crystal Proportions, doping density And perhaps values of further parameters.
The medium must have a large transparency (reduced absorption and scattering) while in the wavelength areas of pump and laser radiation, and fantastic optical homogeneity. To some extent, this depends on the quality of the material, determined by specifics of your fabrication course of action.
The host crystal is considerably more than simply a way to fix the laser-active ions at sure positions in Area. Quite a few Attributes of the host content are very important:
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。
For quasi-3-degree laser gain media or simply 3-stage obtain media, one particular frequently ought to limit the length to a worth that's far too limited for successful pump absorption, as reabsorption results would normally spoil the efficiency. For facet pumping, added criteria occur into Perform; Moreover economical pump absorption, it is important to get an appropriate spatial condition of your attain profile.
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Furthermore, some flexibility is shed in experiments if 1 are not able to Check out absorbers with diverse thickness or doping focus, one example is, without exchanging the laser crystal alone.
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：
Which geometry, dopant and doping focus with the attain medium are most beneficial depend on various variables. The accessible pump supply (kind of laser diode or lamp) as well as envisaged pumping arrangement are essential components, but the material itself also has some impact. Such as, titanium–sapphire lasers need to be pumped with significant intensities, for which the form of a transversely cooled rod, operated with somewhat small pump and laser beam diameter, is much more ideal than e.
It may be oriented for around perpendicular incidence with the laser beam, or at Brewster's angle. It may be fastened in certain good mount which also functions like a heat sink. More substantial crystals usually are employed for aspect pumping e.g. with significant-electric power diode bars.
The most common laser-Lively unusual earth ions and host media together with some regular emission wavelengths are proven in the subsequent table:
These surfaces which might be passed because of the laser beam are Usually possibly oriented at Brewster's angle or have an anti-reflection coating.
Not surprisingly, it is vitally fascinating that a specified crystal top quality is generated consistently, Though unique laser layouts might have a distinct sensitivity to content parameters.
There may be a variety of crystalline media, that may be grouped in accordance to special atomic constituents and crystalline constructions. Some significant teams of crystals are:
With that concept, just one does not need yet another saturable absorber crystal, to make sure that one may perhaps website make much more compact Q-switched laser setups with lower inner parasitic losses. Having said that, unwelcome Unwanted side effects can also happen, including obtaining unwelcome valence states with the involved ions or energy transfers.
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Laser crystals are optical crystals �?typically single crystals (monocrystalline optical products) �?which can be utilized as obtain media for reliable-state lasers. Generally, they are 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。