What Does Laser Crystal Mean?
What Does Laser Crystal Mean?
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Distinctive crystalline components are incredibly distinctive regarding their hardness and other Homes, which identify with which strategies And exactly how easily they are often Slice and polished with good quality.
The medium must have a significant transparency (low absorption and scattering) inside the wavelength areas of pump and laser radiation, and superior optical homogeneity. To some extent, this relies on the quality of the material, determined by information of your fabrication process.
The host crystal is considerably more than simply a method to repair the laser-active ions at specific positions in Place. Many Houses of the host product are very important:
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For quasi-3-stage laser get media or maybe 3-amount gain media, one particular normally needs to Restrict the size to a price which is far too shorter for efficient pump absorption, as reabsorption results would or else spoil the functionality. For facet pumping, additional criteria appear into Perform; besides successful pump absorption, it's important to get an acceptable spatial shape in the get profile.
g. a thin disk. As An additional example, Q-switched lasers reach the next inhabitants density within the higher laser degree and are consequently extra delicate to quenching effects and Electricity transfer procedures; therefore, a decreased doping density is usually suitable for these units. For high-power lasers, reduce doping densities are frequently utilized to limit the density of warmth generation, While skinny-disk lasers work ideal with highly doped crystals. Numerous laser goods do not reach the entire overall performance prospective because this sort of facts haven't been properly labored out.
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A significant hurt threshold with regards to pulse fluence or peak depth is often essential for top-energy amplifiers.
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 concentration in the achieve medium are most advantageous rely on many variables. The readily available pump resource (variety of laser diode or lamp) and the envisaged pumping arrangement are important aspects, here but the fabric by itself also has some influence. As an example, titanium–sapphire lasers ought to be pumped with higher intensities, for which the shape of the transversely cooled rod, operated with relatively compact pump and laser beam diameter, is a lot more acceptable than e.
It could be oriented for near perpendicular incidence from the laser beam, or at Brewster's angle. It can be set in a few solid mount which also functions being a heat sink. Greater crystals tend to be utilized for side pumping e.g. with superior-ability diode bars.
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All those surfaces which are passed by the laser beam are Ordinarily both oriented at Brewster's angle or have an anti-reflection coating.
For a variety of causes, composite crystals have become well known. These Use a spatially varying chemical composition and may be designed with Unique designs.
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。
With that concept, 1 isn't going to need an additional saturable absorber crystal, to make sure that a person may make additional compact Q-switched laser setups with lessen interior parasitic losses. Having said that, unwelcome side effects could also manifest, for instance acquiring undesirable valence states from the involved ions or Electrical power transfers.
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Laser crystals are optical crystals �?usually solitary crystals (monocrystalline optical materials) �?that happen to be made use of as obtain media for stable-state lasers. Normally, These are doped with possibly trivalent uncommon earth ions or transition 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。