The Nonlinear Crystal Diaries
The Nonlinear Crystal Diaries
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Laser modeling and simulation may be used to reliably figure out the optimum crystal Proportions, doping density and possibly values of supplemental parameters.
The medium should have a substantial transparency (low absorption and scattering) inside the wavelength locations of pump and laser radiation, and good optical homogeneity. To some extent, this is determined by the standard of the fabric, determined by specifics with the fabrication procedure.
The host medium influences strongly the wavelength, bandwidth and changeover cross-sections of pump and laser transitions and likewise the higher-point out life span.
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-level laser gain media or simply a few-degree obtain media, 1 often really should Restrict the size to a value which happens to be far too limited for effective pump absorption, as reabsorption consequences would usually spoil the effectiveness. For side pumping, additional criteria appear into Perform; Other than successful pump absorption, it's important to acquire an appropriate spatial condition on the gain profile.
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A significant injury threshold concerning pulse fluence or peak intensity can be critical for high-Electricity 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 focus of your obtain medium are most useful depend on many things. The obtainable pump resource (type of laser diode or lamp) as well as the envisaged pumping arrangement are crucial factors, but the material by itself also has some impact. For example, titanium–sapphire lasers need to be pumped with substantial intensities, for which the shape of the transversely cooled rod, operated with fairly tiny pump and laser beam diameter, is much more correct than e.
It may be oriented for close to perpendicular incidence on the laser beam, or at Brewster's more info angle. It could be fastened in certain good mount which also functions as a heat sink. Bigger crystals are generally utilized for aspect pumping e.g. with large-electricity diode bars.
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Several laser crystal products happen to be demonstrated in which some saturable absorber content is integrated for passive Q switching of the laser.
Naturally, it's very appealing that a supplied crystal quality is made continually, Despite the fact that diverse laser models might have a special sensitivity to material parameters.
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, a single does not will need an extra saturable absorber crystal, to make sure that one may make additional compact Q-switched laser setups with decreased internal parasitic losses. However, undesirable Negative effects might also occur, which include obtaining undesirable valence states on the associated ions or Vitality transfers.
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Laser crystals are optical crystals �?generally solitary crystals (monocrystalline optical products) �?which can be made use of as achieve media for solid-point out lasers. Generally, These are doped with either trivalent exceptional earth ions or changeover steel 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。