Laser Crystal - An Overview
Laser Crystal - An Overview
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Laser modeling and simulation can be utilized to reliably ascertain the ideal crystal Proportions, doping density And perhaps values of supplemental parameters.
The medium should have a large transparency (very low absorption and scattering) in the wavelength locations of pump and laser radiation, and fantastic optical homogeneity. To some extent, this is determined by the quality of the fabric, based on specifics of the fabrication approach.
The host crystal is way more than just a means to fix the laser-Energetic ions at certain positions in House. Many Houses in the host material are essential:
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 utmost attainable doping focus can rely strongly to the host product and its fabrication approach.
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A superior damage threshold in terms of pulse fluence or peak intensity may be essential 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 focus of your acquire medium are most advantageous depend upon various things. The accessible pump source (type of laser diode or lamp) plus the envisaged pumping arrangement are important elements, but the material by itself also has some affect. One example is, titanium–sapphire lasers ought to be pumped with high intensities, for which the shape of the transversely cooled rod, operated with rather compact pump and laser beam diameter, is more suitable than e.
It may be oriented for close to perpendicular incidence in the laser beam, or at Brewster's angle. It might be fastened in certain stable mount which also acts to be a heat sink. Bigger crystals are frequently utilized for side pumping e.g. with high-electric power diode bars.
The most common laser-active unusual earth ions and host media together with some regular emission wavelengths are demonstrated in the subsequent table:
Individuals surfaces which are handed from the laser beam are Commonly either oriented at Brewster's angle or have an anti-reflection coating.
Of course, it is rather fascinating that a given crystal top quality is developed continuously, Even though distinct laser models might have a different sensitivity to material parameters.
There exists a wide array of crystalline media, that may be grouped in accordance to big atomic constituents and crystalline Nonlinear Crystal buildings. Some vital teams of crystals are:
With that concept, a single isn't going to will need a further saturable absorber crystal, making sure that a person may perhaps make more compact Q-switched laser setups with reduced inner parasitic losses. Even so, undesirable Unwanted effects may additionally arise, including obtaining unwanted valence states of the associated ions or Electricity transfers.
GWU offers all popular laser crystals (Nd:YVO4, Nd:YAG, Yb:YAG and many others.) by using a broad variety of requirements. Besides the perfectly-recognized components, innovative crystals with superb Homes like Yb:CALGO can open new horizons for demanding laser apps. Irrespective of whether particular person pieces for R & D applications are essential or cost-successful numbers in smaller, medium or big batches with in-time supply for your generation line are required: GWU’s committed services helps you to locate the greatest Main components on your software.
It is obvious that distinctive applications bring about quite distinctive requirements on laser obtain media. This is why, a wide array of various crystals are used, and creating the ideal decision is important for developing lasers with the best possible 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。