Laser Crystal - An Overview
Laser Crystal - An Overview
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Various crystalline products are extremely distinctive relating to their hardness and various Homes, which figure out with which procedures And the way conveniently they can be Slice and polished with high quality.
The medium ought to have a superior transparency (minimal absorption and scattering) during the wavelength regions of pump and laser radiation, and very good optical homogeneity. To some extent, this depends upon the caliber of the fabric, based on particulars with the fabrication process.
The host medium influences strongly the wavelength, bandwidth and transition cross-sections of pump and laser transitions as well as the upper-state lifetime.
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。
The most feasible doping focus can count strongly over the host materials and its fabrication process.
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A substantial problems threshold with regards to pulse fluence or peak depth might be important for prime-Electrical power 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 beneficial depend upon many components. The out there pump resource (type of laser diode or lamp) and also the envisaged pumping arrangement Nonlinear Crystal are very important factors, but the fabric itself also has some influence. For example, titanium–sapphire lasers should be pumped with superior intensities, for which the form of a transversely cooled rod, operated with relatively small pump and laser beam diameter, is much more acceptable than e.
It might be oriented for in the vicinity of perpendicular incidence on the laser beam, or at Brewster's angle. It may be fixed in some sound mount which also acts like a heat sink. Larger crystals are generally employed for facet pumping e.g. with high-power diode bars.
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Those people surfaces that happen to be handed with the laser beam are Commonly possibly oriented at Brewster's angle or have an anti-reflection coating.
Not surprisingly, it is very attractive that a supplied crystal top quality is developed consistently, While different laser models may have a distinct sensitivity to content parameters.
You can find a wide range of crystalline media, that may be grouped according to special atomic constituents and crystalline structures. Some vital groups of crystals are:
With That idea, one won't need to have an additional saturable absorber crystal, making sure that just one may well make a lot more compact Q-switched laser setups with lessen internal parasitic losses. Even so, unwanted Unwanted side effects might also arise, for instance getting unwanted valence states in the associated ions or Electricity transfers.
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Laser crystals are optical crystals �?normally single crystals (monocrystalline optical components) �?that happen to be applied as get media for stable-condition lasers. Generally, They are really doped with either trivalent unusual earth ions or changeover metallic 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。