The 5-Second Trick For Nonlinear Crystal
The 5-Second Trick For Nonlinear Crystal
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Laser modeling and simulation may be used to reliably identify the ideal crystal dimensions, doping density And perhaps values of extra parameters.
人造红宝石激光晶体是首次实现激光输出的材料。可用焰熔法、提拉法或助熔剂法生产单晶。用提拉法容易获得大尺寸优质晶体。
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 maximum doable doping concentration can rely strongly on the host content and its fabrication process.
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A superior injury threshold in terms of pulse fluence or peak intensity can be critical for top-Vitality 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 with the gain medium are most beneficial rely upon several aspects. The readily available pump resource (kind of laser diode or lamp) along with the envisaged pumping arrangement are crucial factors, but the material by itself also has some affect. One example is, titanium–sapphire lasers here ought to be pumped with high intensities, for which the form of a transversely cooled rod, operated with comparatively modest pump and laser beam diameter, is a lot more correct than e.
It could be oriented for near perpendicular incidence of the laser beam, or at Brewster's angle. It can be set in some sound mount which also acts like a heat sink. Greater crystals are frequently utilized for aspect pumping e.g. with substantial-electric power diode bars.
The most common laser-Lively exceptional earth ions and host media together with some common emission wavelengths are shown in the subsequent table:
A few laser crystal resources have been demonstrated where by some saturable absorber materials is included for passive Q switching of the laser.
For different explanations, composite crystals have become well known. These have a spatially varying chemical composition and might be built with Unique designs.
There may be a variety of crystalline media, that may be grouped in accordance to big atomic constituents and crystalline buildings. Some vital teams of crystals are:
With that concept, a single isn't going to need to have a further saturable absorber crystal, to ensure one particular may well make additional compact Q-switched laser setups with decreased inside parasitic losses. Even so, undesired Unwanted effects may additionally arise, including obtaining unwelcome valence states of your included ions or Vitality transfers.
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It is obvious that distinctive applications result in incredibly distinctive specifications on laser obtain media. For that reason, a wide vary of various crystals are used, and creating the proper selection is essential for setting up lasers with ideal effectiveness.
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。