Nonlinear Crystal Options
Nonlinear Crystal Options
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Laser modeling and simulation may be used to reliably decide the ideal crystal dimensions, doping density and possibly values of further parameters.
The medium ought to have a higher transparency (lower absorption and scattering) in the wavelength regions of pump and laser radiation, and very good optical homogeneity. To some extent, this depends upon the caliber of the material, based on aspects of the fabrication method.
The host crystal is much more than simply a method to repair the laser-Lively ions at specified positions in House. Many properties of the host material are 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-3-amount laser acquire media or maybe three-level get media, just one frequently should Restrict the duration to a price which can be far too shorter for effective pump absorption, as reabsorption outcomes would in any other case spoil the functionality. For side pumping, more considerations occur into Perform; Aside from efficient pump absorption, it is important to get an appropriate spatial shape of the gain profile.
g. a thin disk. As A further illustration, Q-switched lasers access a better population density in the higher laser degree and therefore are consequently much more delicate to quenching effects and energy transfer procedures; therefore, a reduce doping density is usually suitable for these devices. For prime-ability lasers, decreased doping densities tend to be used to Restrict the density of heat technology, Even though slender-disk lasers get the job done ideal with very doped crystals. Lots of laser products will not get to the comprehensive general performance possible due to the fact this kind of particulars haven't been properly worked out.
蓝宝�?柱面�?球罩 偏振�?棱镜 红外光学元件 反射�?光学窗口 非球面镜 波片 分光镜
Furthermore, some overall flexibility is lost in experiments if a single can't try out absorbers with distinctive thickness or doping focus, as an example, with no exchanging the laser crystal by itself.
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 from the gain medium are most useful depend upon a number of things. The offered pump source (form of laser diode or lamp) and also the envisaged pumping arrangement are crucial factors, but the material alone also has some impact. For instance, titanium–sapphire lasers should be pumped with high intensities, for which the form of the transversely cooled rod, operated with relatively modest pump and laser beam diameter, is a lot more suitable than e.
These tables have only the most common host crystals; lots of Many others exist, which are considerably less routinely used.
The most common laser-Lively unusual earth ions and host media together with some usual emission wavelengths are demonstrated in get more info the next table:
A handful of laser crystal components are demonstrated where by some saturable absorber materials is integrated for passive Q switching of a laser.
For numerous reasons, composite crystals have gotten well-known. These have a spatially varying chemical composition and might be built with Distinctive 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 idea, one particular isn't going to want an extra saturable absorber crystal, making sure that 1 might make much more compact Q-switched laser setups with decreased internal parasitic losses. However, undesired side effects could also occur, such as acquiring undesired valence states in the concerned ions or Electricity transfers.
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Laser crystals are optical crystals �?normally single crystals (monocrystalline optical components) �?which might be utilised as achieve media for solid-state lasers. In most cases, They are really doped with both trivalent uncommon earth ions or changeover 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。