Facts About Nonlinear Crystal Revealed
Facts About Nonlinear Crystal Revealed
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Unique crystalline materials are certainly diverse concerning their hardness and other Attributes, which figure out with which solutions And exactly how quickly they can be Minimize and polished with top quality.
The medium must have a substantial transparency (small absorption and scattering) in the wavelength regions of pump and laser radiation, and fantastic optical homogeneity. To some extent, this will depend on the quality of the fabric, based on details of your fabrication method.
The host crystal is a lot more than simply a method to fix the laser-active ions at specific positions in Place. Numerous Homes of your host product 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-a few-degree laser obtain media or perhaps a few-stage obtain media, just one usually should Restrict the duration to a worth which happens to be way too limited for efficient pump absorption, as reabsorption results would usually spoil the efficiency. For aspect pumping, supplemental factors occur into play; Moreover productive pump absorption, it is crucial to get an acceptable spatial condition from the acquire profile.
g. a thin disk. As A different illustration, Q-switched lasers get to the next population density during the higher laser degree and they are thus far more delicate to quenching results and Power transfer procedures; for that reason, a decrease doping density is frequently suitable for these products. For top-energy lasers, lower doping densities are often accustomed to Restrict the density of warmth generation, Whilst thin-disk lasers operate best with hugely doped crystals. Several laser products and solutions usually do not get to the entire overall performance probable for the reason that such information haven't been thoroughly labored out.
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A substantial damage threshold in terms of pulse fluence or peak intensity may be vital 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 concentration in the achieve medium are most beneficial rely upon many components. The readily available pump supply (sort of laser diode or lamp) plus the envisaged pumping arrangement are essential elements, but the fabric by itself also has some influence. Such as, titanium–sapphire lasers need to be pumped with substantial intensities, for which the form of the transversely cooled rod, operated with rather modest pump and laser beam diameter, is a lot more acceptable than e.
These tables have only the most typical host crystals; lots of Other people exist, which are less often applied.
The most typical laser-active exceptional earth ions and host media along with some common emission wavelengths are demonstrated in the subsequent desk:
A handful of laser crystal materials happen to be demonstrated exactly where some saturable absorber product is included for passive Q switching of the laser.
For different good reasons, composite crystals are getting to be preferred. These have a spatially varying chemical composition and can be designed with Distinctive styles.
You can find a wide array of crystalline media, which can be grouped in accordance to important atomic constituents and crystalline buildings. Some essential groups of crystals are:
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It is apparent that distinct applications lead to very various demands on laser obtain media. For this reason, a broad variety of various crystals are applied, and making the right preference is essential for read more constructing lasers with ideal overall performance.
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。